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DELL PowerVault MD3200i

1. Enclosure Loss Protection 0 Host to Virtual Disk Mapping Creating Host to Virtual Disk Mappings Modifying and Removing Host to Virtual DiskMapping 00 Changing Controller Ownership of the Virtual DISK misin e iaga e a ai ee Removing Host to Virtual Disk Mapping Changing the RAID Controller Module Ownership ofaDiskGroup 123 Changing the RAID LevelofaDiskGroup 124 Removing a Host to Virtual Disk Mapping UsingLinuxDMMP 00004 124 Restricted Mappings 0 126 Changing the RAID Controller Module Ownership of a Virtual Disk ora Disk Group 127 Changing the RAID Level ofa Disk Group 129 Storage Partitioning 0004 130 Disk Group and Virtual Disk Expansion 131 Disk Group Expansion 131 Virtual Disk Expansion 0 132 Using Free Capacity 132 Using Unconfigured Capacity 133 Disk Group Migration 2 2 2 133 ExportDiskGroup 133 ExportingaDiskGroup 134 Import Disk Group aaa a 134 ImportingaDiskGroup 134 Storage ArrayMediaScan 136 Changing Media Scan Settings 136 Suspending theMediaScan 137 10 Configuration Premium Feature Snapshot Virtual Disks 139 Scheduling a Snapshot Virtual Disk 140 Contents Commo
2. Installing the RAID Controller Module Backup Battery Unit 0 Power Supply CoolingFanModule Removing a Power Supply Cooling FanModule 00 Installing a Power Supply Cooling FanModule 00 ControlPanel 0 ee ee Removing the Control Panel Installing the Control Panel 0 Backplane c 2 cad x sbi eh OS AE este Removing the Backplane Installing the Backplane 0 16 Management Firmware Inventory Viewing the Firmwarelnventory 17 Management System Interfaces MicrosoftServices 0 0 00004 Virtual Disk Service 2 0 ee Volume Shadow CopyService 18 Troubleshooting Your Storage Array Software 32520650 coun aye ans Start Up Routine ee ee l Contents 225 Device Health Conditions 0 Storage Array SupportData Automatically Collect the Support Bundle Data Collecting the Physical Disk Data EVONELOGs ig waa Sw Bea Be Hs Gee ww AE Recovery GUTU s sn ewe Ha PEG ea es 4 Storage Array Profile 004 Viewing the Logical Associations Viewing the Physical Associations FindingNodes 0 0 00 ee eee Using GOTO 2 5 pe Ae te Bell tS Recovering From an Unresponsive Storage Array Condition 0 00008 Locating a Physical Disk 00 Locating anExpansionEn
3. All storage arrays Select this option to send an alert notification about events on all storage arrays e An individual storage array Select this option to send an alert notification about events that occur in only a specified storage array These results occur depending on your selection e If you selected All storage arrays the C onfigure Alerts dialog is displayed e If you selected An individual storage array the Select Storage Array dialog is displayed Select the storage array for which you want to receive alert notifications and click OK The C onfigure Alerts dialog is displayed K NOTE If you do not know which storage array to select click Blink to turn on the LEDs of the storage array Select the SNM P tab to configure the SNM P alert destinations Configuration About Your Storage Array 79 Adding an SNMP address In C ommunity name type the community name In Trap destination type the trap destination and click Add NOTE The community name is an American Standard Code for Information Interchange ASCII string that identifies a known set of network management stations and is set by the network administrator The default community name is the string public The trap destination is the IP address or the hostname of a computer running an SNMP management application An example of a SNMP enabled management application is the Dell Management Console For more information on Dell Management Console
4. Pushing the release tab toward the front of the array in PowerVault M D 3200 See Figure 15 13 Pulling the release pin toward the front of the array in PowerVault M D 3220 See Figure 15 14 Figure 15 13 Removing and Installing the Control Panel PowerVault M D3200 1 control panel 2 release tab Management Installing ArrayComponents 219 Figure 15 14 Removing and Installing the Control Panel Pow erVault M D3220 1 control panel 2 release pin Installing the Control Panel 1 Align the control panel with the slot on the array 2 Slide the control panel into the array until The release tab clicks into place in PowerVault M D 3200 See Figure 15 13 The release pin clicks into place in PowerVault M D 3220 See Figure 15 14 3 Replace the hard drives in their respective slots See Installing a Hard Drive on page 206 4 Connect all the power cables to the array 5 Turn on the array and the host server 220 Management Installing Array Components Backplane A CAUTION M any repairs may only be done by a certified service technician You must only perform troubleshooting and simple repairs as authorized in your product documentation or as directed by the online or telephone service and support team Damage due to servicing that is not authorized by Dell is not covered by your warranty Read and follow the safety instructions that came with the product Removing the Backplane 1 2 3 4 10 11
5. The newly created virtual disks created on the M D 3200 Series array are now setup and ready to be used Future reboots automatically finds multipathing devices along with their partitions Blacklist Local Drive in Multi path Driver If your multipath drivers are connecting to storage area networks SANs it may be useful to be able to exclude or blacklist certain devices in your etc multipath conf file Blacklisting prevents the multipath driver from attempting to use those local devices To blacklist alocal drive or device 1 Runthemultipath 1 command to determine the local drive or device W W ID World Wide Identifier or vendor model string 184 Configuration Device Mapper Multipath for Linux 2 Editthe etc multipath conf file as follows blacklist wwid drive_wwid or blacklist device vendor vendor_string model model_string K NOTE RedHat version 6 0 and 6 1 users must rebuild the initramfs root file image to include the updated configuration file by running the dracut force command 3 Reboot the host Important Information About Special Partitions W hen using Device M apper with the M D 3200 Series array all physical disks are assigned a disk device node This includes a special device type used for in band management of the M D 3200 Series array known as the Access Disk or Universal Xport device A CAUTION Certain commands such as Isscsi displays one or more instances of Universal Xpo
6. The power supply cooling fan module is removed or has failed See Troubleshooting Power Supply C ooling Fan M odule on page 254 If the problem is not resolved see Getting Help on page 265 Troubleshooting Expansion Enclosure Management M odules A CAUTION Many repairs may only be done by a certified service technician You must only perform troubleshooting and simple repairs as authorized in your product documentation or as directed by the online or telephone service and support team Damage due to servicing that is not authorized by Dell is not covered by your warranty Read and follow the safety instructions that came with the product CAUTION It is recommended that you turn off the host server before turning off the expansion enclosure array to prevent loss of data If the EMM status LED is solid or blinking amber 2 or 4 times per sequence a Turn off the server b RemovetheEMM and verify that the pins on backplane and EM M are not bent See Removing an EMM in the MD 1200 and M D1220 Storage Enclosures Hardware O wner s M anual Troubleshooting Your Array 255 d e f Reseat the EM M module and wait for 30 seconds See Removing an EMM in the M D1200 and M D 1220 Storage Enclosures H ardware Owner s M anual Turn on the server Check the EMM satus LED If the LED does not turn Green replacethe EMM If the problem is not resolved see Getting Help on page 265 If EMM satus LED is blinking amber
7. copy is completed Giving the copy process top priority slightly impacts I O performance while giving it lowest priority makes the copy process longer to complete You can modify the copy priority while the disk copy is in progress For more information see the online help topics Planning M D3200 Series Storage Array Terms and Concepts 53 Virtual Disk Recovery You can use the E dit host server to virtual disk mappings feature to recover data from the backup virtual disk T his functionality enables you to unmap the original source virtual disk from its host server then map the backup virtual disk to the same host server Ensure that you record the LUN used to provide access to the source virtual disk You need this information when you define a host server to virtual disk mapping for the target backup virtual disk Also be sure to stop all 1 0 activity to the source virtual disk before beginning the virtual disk recovery procedure Using Snapshot and Disk Copy Together You can use the Snapshot Virtual Disk and Virtual Disk C opy premium features together to back up data on the same storage array or to restore the data on the snapshot virtual disk to its original source virtual disk You can copy data from a virtual disk by e Taking a point in time snapshot of the data online Copying the data to another virtual disk using a virtual disk copy offline You can select a snapshot virtual disk as the source virtual disk
8. gt C hange gt Segment Size 3 Select the required segment size A message prompts you to confirm the selected segment size 4 Click Yes The segment size modification operation begins The virtual disk icon in the Logical pane shows an Operation in Progress status while the operation is taking place K NOTE To view the progress or change the priority of the modification operation selecta virtual disk in the disk group and select Virtual Disk gt Change gt M odification Priority Changing the I O Type You can specify the virtual disk I O characteristics for the virtual disks that you are defining as part of the storage array configuration The expected I O characteristics of the virtual disk is used by the system to indicate an applicable default virtual disk segment size and dynamic cache read prefetch setting For more information about the Automatic C onfiguration W izard see the PowerVault M odular Disk Storage M anager online help topics K NOTE The dynamic cache read prefetch setting can be changed later by selecting Virtual Disk gt Change Cache Settings You can change the segment size later by selecting Virtual Disk gt Change Segment Size Thel O characteristic types shown below are only presented during the create virtual disk process W hen you choose one of the virtual disk I O characteristics the corresponding dynamic cache prefetch setting and segment size that are typically well suited f
9. Check the Physical D isks to add enclosure slot area to make sure that the correct physical disks are added Either accept the final capacity or enter or select the appropriate capacity in Increase capacity by field Click OK The Logical tab is updated T he snapshot repository virtual disk that is having its capacity increased shows a status of O peration in Progress In addition the snapshot repository virtual disk shows its original capacity and the total capacity being added T he Free C apacity node involved in the increase shows a reduction in capacity If all of the free capacity is used to increase the size of the virtual disk the Free C apacity node involved is removed from the Logical tab Configuration Premium Feature Snapshot Virtual Disks A new Free C apacity node is created and shown in the Logical tab if these conditions exist A Free C apacity node did not exist prior to the addition of capacity e Not all of the capacity that is added is used to increase the capacity of the snapshot repository virtual disk On the Physical tab the unassigned physical disks or unconfigured capacity that you added to increase the capacity of the snapshot repository virtual disk change to assigned physical disks The new assigned physical disks are associated with the disk group of the snapshot repository virtual disk Disabling a Snapshot Virtual Disk Disable a snapshot virtual disk if one of the following condition
10. Physical Disk Security with Self Encrypting Disk Self encrypting disk SED technology prevents unauthorized access to the data on a physical disk that is physically removed from the storage array The storage array has a security key Self encrypting disks provide access to data only through an array that has the correct security key The self encrypting disk or a security capable physical disk encrypts data during writes and decrypts data during reads For more information see the PowerVault M odular Disk Storage M anager online help topics You can create a secure disk group from security capable physical disks W hen you create a secure disk group from security capable physical disks the physical disks in that disk group become security enabled W hen a security capable physical disk is security enabled the physical disk requires the correct security key from a RAID controller module to read or write the data All of the physical disks and RAID controller modules in a storage array share the same security key The shared security key provides read and write access to the physical disks while the physical disk encryption key on each physical disk is used to encrypt the data A security capable physical disk works like any other physical disk until it is security enabled W henever the power is turned off and turned on again all of the security enabled physical disks change to a security locked state In this state the data is inaccessib
11. Planning About Your Storage Array 25 Item Indicator Button or Connector Icon Description Split mode LED System identification button Hard drives Enclosure mode switch ge 0 8 ge ThisLED must be unlit as the split mode function is not supported by the M D 3200 Series Storage Arrays The system identification button on the front control panel can be used to locate a particular enclosure within a rack W hen the button is pushed the system status indicators on the control panel and the RAID controller module s blink blue until the button is pushed again M D 3200 Up to twelve 3 5 SAS hot swappable hard drives M D3220 Up to twenty four 2 5 SAS hot swappable hard drives The function of this switch is not applicable to your storage array However if M D 1200 Series expansion enclosures are daisy chained to the storage array the enclosure mode switches of the M D 1200 Series expansion enclosures must be set to the Unified M ode position NOTE This switch must be set before turning on the M D1200 Series expansion enclosure Changing the switch setting after the expansion enclosure is turned on has no effect on the enclosure configuration until the expansion enclosure goes through a complete power cycle 26 Planning About Your Storage Array Back Panel Features and Indicators Figure 2 4 Back Panel Features and Indicators Dell Pow erVault M D3200 Series 1 600 W p
12. Unmount any file systems on the source virtual disk and the target virtual disk In the AM W select Virtual Disk C opy M anager The C opy M anager window is displayed Configuration Premium Feature Virtual DiskCopy 175 4 Select the copy pair in the table 5 Select C opy gt Re C opy The Re C opy window is displayed 6 Set the copy priority K NOTE There are 5 copy priority rates available lowest low medium high and highest If the copy priority is set at the lowest rate I O activity is prioritized and the virtual disk copy takes longer If the copy priority is set to the highest priority rate the virtual disk copy is prioritized but 1 0 activity for the storage array may be affected Removing Copy Pairs You can remove one or more virtual disk copies by using the C opy M anager Any virtual disk copy related information for the source virtual disk and the target virtual disk is removed from the Virtual D isk Properties and the Storage Array Profile dialogs W hen you remove a virtual disk copy from the storage array the Read Only attribute for the target virtual disk is also removed After the virtual disk copy is removed from the Copy M anager you can either select the target virtual disk as a source virtual disk or the target virtual disk for a new virtual disk copy If you remove a virtual disk copy the source virtual disk and the target virtual disk no longer displays in the C opy M anager Keep these guide
13. and wait for up to 5 minutes to check if the LED has turned blue See Recovery Guru on page 235 If following the recovery guru procedures does not solve the problem complete the following procedure to further troubleshoot the array Turn off the host server as appropriate Remove the RAID controller module and verify that the pins on backplane and RAID controller module are not bent See Removing a RAID Controller M odule Blank on page 209 Reinstall the RAID controller module and wait for 30 seconds See Installing a RAID Controller M odule on page 212 Check the RAID controller module status LED Replace the RAID controller module Turn on the host server If the problem is not resolved see G etting Help on page 265 If the link status LEDs are not green see Troubleshooting Array and Expansion Enclosure C onnections on page 259 a b Turn off the server storage arrays and expansion enclosures Reseat the RAID controller module and reconnect cables on the storage array and the server Restart the storage array and wait until the array is fully booted Turn on the server Check the link status LED If the link status LED is not green replace the cables If the problem is not resolved see G etting Help on page 265 Troubleshooting Your Array 257 Troubleshooting Hard Drives A CAUTION Many repairs may only be done by a certified service technician You must only perform troubleshooting and simp
14. indicate multiple failures on the array To use the Event M onitor e Set up alert destinations for the managed device that you want to monitor A possible alert destination would be the D ell Management C onsole M ore information about the Dell Management C onsole can be found at dell com e Replicate the alert settings from a particular managed device by copying the emwdata bin file to every storage management station from which you want to receive alerts Each managed device shows a check mark that indicates that alerts are set Configuration Event M onitor 83 Enabling or Disabling the Event M onitor You can enable or disable the event monitor at any time Disable the event monitor if you do not want the system to send alert notifications If you are running the event monitor on multiple systems disabling the event monitor on all but one system prevents the sending of duplicate messages K NOTE It is recommended that you configure the event monitor to start by default on a management station that runs 24 hours a day Windows To enable or disable the event monitor 1 Click Start Administrative Tools Services or Click Start Settings C ontrol Panel Administrative Tools Services 2 From the list of services select M odular D isk Storage M anager E vent M onitor 3 Select Action Properties 4 To enable the event monitor in the Service Status area click Start 5 To disable the event monitor in the Ser
15. see dell com e Replacing an SNM P address Select the SNM P address in the C onfigured SN M P addresses area type the replacement community name in C ommunity name and the trap destination in Trap destination and click Replace Deleting an SNMP address Select the SNM P address in the C onfigured SNM P addresses area and click D elete e Validating an SNM P address Select the SNM P address in the Configured SNM P addresses area and click Test A test message is sent to the SNM P address A message box with the results of the validation and any error information is displayed 4 Click OK An alert icon is displayed next to each node in the Tree view for which an alert is set Follow these guideline for SN MP alerts 80 Any SNMP addresses that you had previously configured are displayed in the Configured SNM P addresses area The SNMP Community Name is determined by the system administrator and configured within the a management application such as the Dell Management C onsole M ore information about the D ell Management Console is available at dell com You can configure multiple SNM P addresses before you click OK Configuration About Your Storage Array Battery Settings A smart battery backup unit BBU can perform a learn cycle The smart BBU module includes the battery a battery gas gauge and a battery charger The learn cycle calibrates the smart battery gas gauge so that it provides a measurement o
16. which you want to download firmware or select Select All to select all of the expansion enclosures in the storage array Each selected expansion enclosure must have the same product ID Click Select File The Select Environmental E M M C ard Firmware File dialog is displayed Select the file to download and click OK Click Start Click Yes to continue with the firmware download Management Firmware Downloads 197 K NOTE If you click Stop while a firmware download is in progress the download in progress finishes before the operation stops The status for the remaining expansion enclosures changes to Canceled 7 Monitor the progress and completion status of the download to the expansion enclosures T he progress and status of each expansion enclosure that is participating in the download is displayed in the Status column of the Select enclosures table K NOTE Each firmware download can take several minutes to complete 8 Perform one of these actions depending on whether the download succeeded e The download succeeded The statuses of all the expansion enclosures show Complete You can close the D ownload environmental EM M Card Firmware dialog by clicking Close The expansion enclosure EM M cards are now operating with the new firmware e The download failed The status of one expansion enclosure shows Failed and the remainder of the expansion enclosures show C anceled M ake sure that the new firmware file is
17. Blinks blue when system identification switch push button on enclosure front panel is pressed Lights green when all four links are connected Lights amber when one to 3 links are disconnected Off when all links in the port are disconnected or cable is disconnected Lights green when on board controller memory contains data If AC power fails this LED changes to indicate C ache Offload status If the password reset function has successfully changed the password this LED flashes on and off briefly Lights amber when battery backup unit or battery has failed Off when battery backup unit is operating normally Activating this switch deletes the password Lights green when all four links are connected Lights amber when one to 3 links are disconnected Off when all links in the port are disconnected or cable is disconnected Planning RAID ControllerModules 33 Item Component Function 18 SASIN 3 port Lights green when all four links are connected linkffault LED Lights amber when one to 3 links are disconnected Off when all links in the port are disconnected or cable is disconnected 19 Management Lights green when ethernet connection is operating at 1000 port speed LED Mbps Lights amber when ethernet connection is operating at 100 M bps Off when ethernet connection is operating at 10 M bps or is not active 20 Management Lights green when ethernet connection is active port activity LED Off when ethernet c
18. C urrent password K NOTE If you are setting the password for the first time leave the Current password blank Type the N ew password Re type the new password in C onfirm new password K NOTE The password in Confirm new password and New password must be exactly the same Click OK NOTE You are not prompted for a password when you attempt to change the storage array configuration in the current management session Configuration About Your Storage Array 71 Password Guidelines Follow these guidelines when you create a password e Use secure passwords for your storage array A password must be easy for you to remember but difficult for others to determine C onsider using numbers or special characters in the place of letters such as a 1 in the place of the letter I or the at sign in the place of the letter a e For increased protection use a long password with at least 15 alphanumeric characters The maximum password length is 30 characters e Passwords are case sensitive K NOTE You can attempt to enter a password up to ten times before the storage array enters a lockout state Before you can try to enter a password again you must wait 10 minutes for the storage array to reset To reset the password press the password reset switch on your RAID controller module see Figure 3 1 Viewing Storage Array Connections You can use the View C onnections option to view the expansion enclosures connected to the RA
19. Cops ce seh wakes OnlineCopy Creating a Virtual Disk Copy for an MSCS SharedDisk Virtual Disk Read Write Permissions Virtual Disk Copy Restrictions Creating a Virtual Disk Copy BeforeyouBegin Virtual Disk Copy and M odification Operations 04 Create Copy Wizard Failed Virtual DiskCopy Preferred RAID Controller M odule Ow nership Failed RAID ControllerModule CopyManager Copying the Virtual Disk Storage Array Performance During Virtual Disk Copy 2 0 0 00 00 Setting Copy Priority Stopping a Virtual Disk Copy Contents 11 Recopyinga Virtual Disk 0 4 174 Preparing Host Servers to RecopyaVirtualDiskk 0 174 Re CopyingaVirtualDisk 175 Removing CopyPairs 176 12 Configuration Premium Feature Upgrading to High Performance Tier 177 13 Configuration Device Mapper M ultipath for LINUX oaaae 179 OVENVIOW Sst rs BAA ar Bee SA 179 Using DM Multipathing Devices 180 Prerequisite Steps 180 Device Mapper Configuration Steps 181 Limitations and Known Issues 187 Troubleshooting o oaaao 188 14 Management Firmware DownloadS oona aaa 189 Dow nloading RAID Controller and NVSRAM Packages 0 189 Dow
20. Dow nloading Physical Disk Firmware A CAUTION When updating physical disk firmw are you must stop all I O activity to the array to prevent data loss The physical disk firmware controls various features of the physical disk The disk array controller DAC uses this type of firmware Physical disk firmware stores information about the system configuration on an area of the physical disk called DAC store DAC store and the physical disk firmware enable easier reconfiguration and migration of the physical disks The physical disk firmware performs these functions e The physical disk firmware records the location of the physical disk in an expansion enclosure If you take a physical disk out of an expansion enclosure you must insert it back into the same physical disk slot or the physical disk firmware cannot communicate with the RAID controller module or other storage array components RAID configuration information is stored in the physical disk firmware and is used to communicate with other RAID components A CAUTION Risk of application errors Downloading the firmware may cause application errors Keep these important guidelines in mind when you download firmware to avoid the risk of application errors Downloading firmware incorrectly could result in damage to the physical disks or loss of data Perform downloads only under the guidance of your Technical Support representative Stop all 1 O to the storage array before
21. Enable write caching without batteries to permit write caching to continue even if the RAID controller module batteries are discharged completely not fully charged or are not present CAUTION Possible loss of data Selecting the Enable write caching without batteries option allows write caching to continue even when the batteries are discharged completely or are not fully charged Typically write caching is turned off temporarily by the RAID controller module until the batteries are charged If you select this option and do not have a universal power supply for protection you could lose data In addition you could lose data if you do not have RAID controller module batteries and you select the Enable write caching without batteries option K NOTE When the Optional RAID controller module batteries option is enabled Enable write caching is not displayed The Enable write caching without batteries is still available but it is not checked by default NOTE Cache is automatically flushed after the Enable write caching check box is disabled Configuration Disk Groups and Virtual Disks 5 Click OK A message prompts you to confirm the change in the virtual disk modification priority 6 Click Yes 7 Click OK Changing the Segment Size of a Virtual Disk You can change the segment size on a selected virtual disk During this operation I O performance is affected but your data remains available Guidelines to proceed with
22. Level as at a host level sets alert fir any child nodes If you set an alert at a parent node level and any of the in band storage array child nodes have a Needs U pgrade status the Alert Disables status icon is displayed next to the parent node in the tree view Troubleshooting Your Storage Array Software 231 Table 18 3 Additional Status Icons Status Icon Description Adding a Storage Array Adding a Storage Array OK Adding a Storage Array Error The Contacting Storage Array icon is shown in the Tree view and Table view until the current status of each managed storage array is known The Contacting Storage Array icon is shown in the EMW Status Bar and the AM W Status Bar and the tooltip shows C ontacting Storage arrays As each storage array is contacted its current status is obtained and shown in the Tree view and Table view T he applicable statuses are the Optimal Needs Attention Fixing or Unresponsive No problems were encountered while adding the storage array MDSM software continues to check for any status change events Displayed only when an error occurs NOTE MDSM may take a few minutes to update a status change to Unresponsive or from Unresponsive A status change from or to Unresponsive depends on the network link to the storage array All other status change updates faster Storage Array Support Data You can gather various types of inventory status and perfor
23. OK 13 In the M appings tab assign mappings between the snapshot virtual disk and the host that accesses the snapshot virtual disk 14 To register the snapshot virtual disk with the host operating system run the host based hot_add utility 15 To associate the mapping between the storage array name and the virtual disk name run the host based SM devices utility Specifying Snapshot Virtual Disk Names Choose a name that helps you associate the snapshot virtual disk and snapshot repository virtual disk with its corresponding source virtual disk The following information is useful when naming virtual disks By default the snapshot name is shown in the Snapshot virtual disk name field as lt source virtual disk name gt lt sequence number gt where sequence number is the chronological number of the snapshot relative to the source virtual disk The default name for the associated snapshot repository virtual disk that is shown in the Snapshot repository virtual disk field is lt source virtual disk name gt R lt sequence number gt For example if you are creating the first snapshot virtual disk for a source virtual disk called Accounting the default snapshot virtual disk is Accounting 1 and the associated snapshot repository virtual disk default name is Accounting R1 T he default name of the next snapshot virtual disk you create based on Accounting is Accounting 2 with the corresponding snapshot repository virtu
24. Priority The storage array supports a common configurable priority for the following RAID operations Background initialization e Rebuild Copy back e Virtual disk capacity expansion e Raid level migration Planning MD3200 Series Storage Array Terms andConcepts 47 Segment size migration e Disk group expansion Disk group defragmentation The priority of each of these operations can be changed to address performance requirements of the environment in which the operations are to be executed K NOTE Setting a high priority level impacts storage array performance It is not advisable to set priority levels at the maximum level Priority must also be assessed in terms of impact to host server access and time to complete an operation For example the longer a rebuild of a degraded virtual disk takes the greater the risk for secondary disk failure Virtual Disk Migration and Disk Roaming Virtual disk migration is moving a virtual disk or a hot spare from one array to another by detaching the physical disks and re attaching them to the new array Disk roaming is moving a physical disk from one slot to another on the same array Disk Migration You can move virtual disks from one array to another without taking the target array offline H owever the disk group being migrated must be offline before your perform disk migration If the disk group is not offline prior to migration the source array holding the physical and
25. Software Engineering GR 1 and the default repository name would be H ost Software Engineering GR R1 Snapshot Repository Capacity If you receive a warning that the capacity for the snapshot repository virtual disk is approaching its threshold you can increase the capacity of a snapshot repository virtual disk by using one of the following methods e Usethe free capacity available on the disk group of the snapshot repository virtual disk e Add unconfigured capacity to the disk group of the snapshot repository virtual disk Use this option when no free capacity exists on the disk group You cannot increase the storage capacity of a snapshot repository virtual disk if the snapshot repository virtual disk has any one of the following conditions e The virtual disk has one or more hot spare drives in use The virtual disk has a status other than Optimal e Any virtual disk in the disk group isin any state of modification e The controller that has ownership of this virtual disk is currently adding capacity to another virtual disk Each controller can add capacity to only one virtual disk at atime e No free capacity exists in the disk group e No unconfigured capacity is available to add to the disk group 152 Configuration Premium Feature Snapshot Virtual Disks K NOTE You can add a maximum of two physical disks at one time to increase snapshot repository virtual disk capacity To expand the snapshot repository virtual
26. Turn off the array and disconnect it from the electrical outlet Disconnect all the cables connected to the array Remove the hard drives See Removing a Hard Drive on page 204 Remove the RAID controller modules See Removing a RAID Controller Module on page 211 Remove the power supply cooling fan modules See Removing a Power Supply C ooling Fan M odule on page 216 Remove the control panel See Removing the C ontrol Panel on page 218 Remove the screws that secure the RAID controller module power supply cage to the chassis Grasp the cage removal ring at the bottom center of the array and pull the RAID controller module power supply cage toward the back of the chassis See Figure 15 15 Lift the RAID controller module power supply cage away from the chassis See Figure 15 15 Loosen the captive screw that secures the backplane to the chassis See Figure 15 16 for PowerVault M D 3200 or Figure 15 17 for PowerVault MD 3220 Remove the screws that secure the backplane and pull the backplane out of the array See Figure 15 16 for PowerVault M D 3200 or Figure 15 17 for PowerVault M D 3220 Management Installing ArrayComponents 221 Figure 15 15 Removing and Installing the RAID Controller M odule Pow er Supply Cage 1 screws 6 2 RAID controller module power supply cage 222 Management Installing Array Components Figure 15 16 Removing and Installing the Backplane Pow erVault M D3200 1 screws 5 2 ba
27. WV A W Import Disk Group The import disk group operation adds the imported disk group to the target storage array After you complete the import disk group operation all of the physical disks have O ptimal status Any associated virtual disks or free capacity nodes are now shown in MDSM installed on the target storage array K NOTE You lose access to your data during the export import process K NOTE You must export a disk group before you move the disk group or import the disk group Importing a Disk Group K NOTE You must insert all of the physical disks that are part of the disk group into the enclosure before the disk group can be imported 134 Configuration Disk Groups and Virtual Disks On the target storage array 1 Insert the exported physical disks into the available physical disk slots 2 Review the Import Report for an overview of the disk group that you are 3 4 importing Check for non importable components Confirm that you want to proceed with the import procedure K NOTE Some settings cannot be imported during the import disk group procedure The following settings are removed cleared during the procedure Persistent reservations H ost to virtual disk mappings Virtual disk copy pairs Snapshot virtual disks and snapshot repository virtual disks Remote mirror pairs M irror repositories Non Importable Components Some components cannot be imported during the import disk group proc
28. a multipathing node may be created for the root disk The command multipath 11 lists vendor product ID which can help identify this issue Configuration Device Mapper Multipath for Linux 187 Troubleshooting Question Answer How can check if multipathd Run the following command is running etc init d multipathd status W hy does the multipath First verify if the devices are discovered or not The 11 command output not command cat proc scsi scsi displays all show any devices the devices that are already discovered Then verify the multipath conf to ensure that it is updated with proper settings After this run multipath Then run multipath 11 the new devices must be displayed W hy isanewly mapped LUN Run rescan_dm_devs in any directory This must not assigned a multipathing bring up the devices device node haveno LUNsmapped before Run rescan_dm_devs instead of rescan Then map afew LUNs After scsi bus for LUN 0 reconfiguration running rescan scsi bus sh LUN 0 does not show up removed a LUN but the The multipathing device is still there after you multipathing mappingisstill remove the LUNs Run multipath f lt device present node for the deleted LUN gt to remove the multipathing mapping For example if device devices related with dev dm 1 is deleted you must run multipath f dev dm 1 to remove dev dm 1 from DM mapping table If multipathing daemon is stopped restarted run mult
29. and dual RAID controller configuration The Dell PowerVault M D 3200 Series storage array provides 6 0 G bps SAS connectivity to the host server and enables access for up to eight non redundant servers or four redundant servers The M D 3200 Series storage array includes a number of components T hese are RAID controller module s PSU Fan modules e Disk drives also called physical disk drives in this document e A front bezel optional e A system enclosure into which the other components are plugged Planning About Your Storage Array 23 Hardw are Features Front Panel Features and Indicators Figure 2 1 Front Panel Features and Indicators Dell Pow erVault M D3200 24 Planning About Your Storage Array Figure 2 3 Front Bezel Features and Indicators Item Indicator Button or Icon Connector Description 1 2 Enclosure status LED Power LED O The enclosure satus LED lights when the enclosure power is on Lights blue during normal operation Blinks blue when a host server is identifying the enclosure or when the system identification button is pressed Lights amber as enclosure boots or is reset Blinks amber when the enclosure is either in a fault state or the hosts are not using the preferred path to a virtual disk The power LED lights green when at least one power supply is supplying power to the enclosure
30. and guidelines apply to performing a snapshot rollback e Rolling back a base virtual disk to a snapshot virtual disk does not affect the contents of the snapshot virtual disks e Only one snapshot rollback operation can be performed at atime e While a base virtual disk that is undergoing a rollback you cannot create a new snapshot virtual disks from that base virtual disk A snapshot rollback cannot be started while any of these operations are underway Virtual Disk Capacity Expansion Virtual Disk Expansion VDE RAID Level Migration Segment Size M igration Virtual Disk Copy Role Reversal in remote replication e f the base virtual disk is a secondary virtual disk in a remote replication you cannot perform a snapshot rollback e If any capacity used in the associated snapshot repository virtual disk contains unreadable sectors the snapshot rollback fails 158 Configuration Premium Feature Snapshot Virtual Disks If an error occurs during the rollback the operation is paused and the base virtual disk and snapshot virtual disk displays N eeds Attention icons The RAID controller module also logs the event to the M ajor Event Log MEL Follow the Recovery Guru procedure to correct the error and repeat the rollback operation A WARNING Risk of data loss If you cancel a snapshot rollback in progress the base virtual disk may remain in an unusable state and the snapshot virtual disk is displayed
31. area select either Offline or O nline C opy Type K NOTE An online virtual disk copy overwrites data on the target virtual disk and automatically makes the target virtual disk read only to hosts After the online virtual disk copy completes use Copy M anager to disable the Read Only attribute for the target virtual disk If you have used the target virtual disk in a virtual disk copy before make sure that you no longer need that data or have backed it up in an accessible location The Select Target Virtual Disk window is displayed Configuration Premium Feature Virtual DiskCopy 171 7 In the Select target virtual disk area select the appropriate virtual disk 8 Inthe Select copy priority area select the relevant copy priority and click Next The Confirmation window displays the summary of your selections 9 Type yes and click Finish K NOTE Operation in Progress icons are displayed on the source virtual disk and the target virtual disk while the virtual disk copy has a status of In Progress or Pending For more information see the PowerVault M odular Disk Storage M anager online help topics Storage Array Performance During Virtual Disk Copy The following factors contribute to the overall performance of the storage array e 1 0 activity e Virtual disk RAID level e Virtual disk configuration Number of drives in the virtual disk groups e Virtual disk type Snapshot virtual disks may take more time to copy than
32. array is using 108 Configuration Disk Groups and Virtual Disks To create a security key 1 Inthe AM W toolbar select Storage Array gt Physical D isk Security gt C reate Security Key The C reate Security Key window is displayed Enter a string that becomes part of the secure key identifier in Security key identifier You can enter up to 189 alphanumeric characters without spaces punctuation or symbols Additional characters is generated automatically and is appended to the end of the string that you enter The generated characters help to ensure that the secure key identifier is unique Edit the default path by adding a file name to the end of the path or click Browse navigate to the required folder and enter the name of the file Enter a string for the pass phrase in Pass phrase The pass phrase must be between 8 and 32 characters long e contain at least 1 uppercase letter e contain at least 1 lowercase letter e contain at least 1 number e contain at least 1 non alphanumeric character for example lt gt The pass phrase that you enter is masked K NOTE Create Key is active only if the pass phrase meets the above mentioned criterion In C onfirm pass phrase re enter the exact string that you entered in Pass phrase M ake a record of the pass phrase that you entered and the security key identifier that is associated with the pass phrase You need this information for later secure op
33. as failed in the M D storage management softw are Therefore do not cancel a snapshot rollback unless reliable recovery options exist for restoring the content of the base virtual disk Command Line Options Optionally you also can use the command line interface CLI to start cancel resume or modify priority of a snapshot rollback For more information see the CLI Guide Protecting Against a Failed Snapshot Rollback To protect your base virtual disk data it is recommended that you create a new snapshot virtual disk from the base virtual disk before beginning a rollback operation If the snapshot rollback fails use this new snapshot virtual disk to restore your base virtual disk Previous Versions of the MD Storage M anager Snapshot virtual disks created using previous versions of M D Storage M anager that did not support snapshot rollback do not have to be recreated or changed to be used in a subsequent rollback operation Once the latest versions of the M D storage management software and RAID controller module firmware are installed snapshot virtual disks created under previous versions support the snapshot rollback feature H owever if you revert to an older version of the MD storage management software after you have performed a snapshot rollback the older MD storage management software does not support the snapshot virtual disk Starting a Snapshot Rollback To start a snapshot rollback 1 Inthearray management window sel
34. before troubleshooting any external devices To locate the back panel connectors on your array see Figure 3 1 Ensure that all the cables are securely attached to the external connectors on your array For information on cabling see the D ell PowerVault M D 3200 Deployment Guide at dell com support manuals Troubleshooting YourArray 253 Troubleshooting Power Supply Cooling Fan Module ZX CAUTION Many repairs may only be done by a certified service technician You must only perform troubleshooting and simple repairs as authorized in your product documentation or as directed by the online or telephone service and support team Damage due to servicing that is not authorized by Dell is not covered by your warranty Read and follow the safety instructions that came with the product A CAUTION Itis recommended that you turn off the host server before turning off the array to prevent loss of data 1 Locate the faulty power supply and determine the status of the LEDs e ftheAC power LED isnot lit check the power cord and power source into which the power supply is plugged e Connect another device to the power source to verify if it is working e Connect the cable to a different power source e Replace the power cable If the problem is not resolved see Getting H elp on page 265 e IftheDC power LED isnot lit verify that the power switch is turned on If the power switch is turned on see step 2 f the power supply
35. can change the failover alert delay for a storage array T he failover alert delay lets you delay the logging of a critical event if the multi path driver transfers virtual disks to the non preferred controller If the multi path driver transfers the virtual disks back to the preferred controller within the specified delay period a critical event is not logged If the transfer exceeds this delay period then a virtual disk not on preferred path alert is issued as a critical event You can also use this option to minimize multiple alerts when more than one virtual disk fails over because of a system error such as a failed host adapter For more information see the PowerVault M odular Disk Storage M anager online help topics 74 Configuration About Your Storage Array Changing the Cache Settings on the Storage Array To change the storage array cache settings 1 Inthe AMW select Storage Array C hange C ache Settings The C hange C ache Settings window is displayed 2 Select or enter the percentage of unwritten data in the cache to trigger a cache flush in Start flushing 3 Select or enter the percentage of unwritten data in the cache to stop a cache flush in progress in Stop flushing 4 Select the appropriate C ache block size A smaller cache size is a good choice for filesystem use or database application use A larger cache size is a good choice for applications that generate sequential 1 0 such as multimedia 5 Inthe Enter Pa
36. changing the segment size e You cannot cancel this operation after it starts e Donot start this operation unless the disk group is in Optimal status e MDSM determines the segment size transitions that are allowed Segment sizes that are inappropriate transitions from the current segment size are unavailable on the menu Allowed transitions usually are double or half of current segment size For example if the current virtual disk segment size is 32 KB anew virtual disk segment size of either 16 KB or 64 KB is allowed K NOTE The operation to change the segment size is slower than other modification operations for example changing RAID levels or adding free capacity to a disk group This slowness is the result of how the data is reorganized and the temporary internal backup procedures that occur during the operation The amount of time that a change segment size operation takes depends on e Thel O load from the host e The modification priority of the virtual disk e Thenumber of physical disks in the disk group e Thenumber of physical disk ports e The processing power of the storage array RAID controller modules If you want this operation to complete faster you can change the modification priority although this may decrease system I O performance Configuration Disk Groups and Virtual Disks 103 To change the segment size of a virtual disk 1 Inthe AMW select the Logical tab and select a virtual disk 2 Select Virtual D isk
37. chose a Free C apacity node the The Introduction C reate Virtual Disk window is displayed 2 Click Next The Specify C apacity N ame window is displayed 3 Select the appropriate unit for memory in Units and enter the capacity of the virtual disk in New virtual disk capacity 4 Enter an up to 30 character name for the virtual disk in Virtual disk name Configuration Disk Groups and Virtual Disks 99 10 In Advanced virtual disk parameters you can select Use recommended settings e Customize settings Click Next In the C ustomize Advanced Virtual D isk Parameters window select the appropriate Virtual Disk I O characteristics type You can select e File system typical Database e Multimedia e Custom K NOTE If you select Custom you must select an appropriate segment size Select the appropriate Preferred RAID controller module ownership and click Next T he Specify Virtual D isk to LUN M apping window is displayed In the Specify Virtual D isk to LUN M apping window you can select e Default M apping e The appropriate H ost type e Map later Using M appings View Click Finish The virtual disks are created Changing the Virtual Disk Modification Priority You can specify the modification priority setting for a single virtual disk or multiple virtual disks on a storage array Guidelines to change the modification priority of a virtual disk 100 If more than one virtual disk is selected
38. configuration of the storage array Create a new copy of the storage array profile if your configuration changes 1 To open the storage array profile in the AM W perform one of the following actions e Select Storage Array View Profile e Select the Summary tab and click Storage Array Profile in the Status area e Select the Support tab and click View Storage Array Profile The Storage Array Profile dialog is displayed The Storage Array Profile dialog contains several tabs and the title of each tab corresponds to the subject of the information contained 2 Perform one of these actions in the Storage Array Profile dialog e View detailed information Go to step 3 e Search the storage array profile Go to step 4 Save the storage array profile Go to step 5 e Close the storage array profile Go to step 6 3 Select one of the tabs and use the horizontal scroll bar and the vertical scroll bar to view the storage array profile information You can use the other steps in this procedure to search the storage array profile to save the storage array profile or to close the storage array profile 236 Troubleshooting Your Storage Array Software 4 To search the storage array profile a b Click al Type the term that you want to search for in the Find text box If the term is located on the current tab the term is highlighted in the storage array profile information K NOTE The search is limited to the cur
39. controller module of the source virtual disk W hen the virtual disk copy is completed or is stopped ownership of the target virtual disk is restored to its preferred RAID controller module If ownership of the source virtual disk is changed during the virtual disk copy ownership of the target virtual disk is also changed Failed RAID Controller Module You must manually change RAID controller module ownership to the alternate RAID controller module to allow the virtual disk copy to complete under all of these conditions e A virtual disk copy has a status of In Progress e The preferred RAID controller module of the source virtual disk fails e The ownership transfer does not occur automatically in the failover Copy M anager After you create a virtual disk copy by using the C reate C opy W izard you can monitor the virtual disk copy through the C opy M anager From the Copy M anager a virtual disk copy may be re copied stopped or removed You can also modify the attributes such as the copy priority and the target virtual disk Read Only attribute You can view the status of a virtual disk copy in the Copy M anager Also if you need to determine which virtual disks are involved in a virtual disk copy you can use the C opy M anager or the storage array profile 170 Configuration Premium Feature Virtual Disk Copy Copying the Virtual Disk You can create a virtual disk copy by using the Create C opy W izard CAUTION Possibl
40. disk from M DSM 1 IntheAM W select the Logical tab 2 Select the snapshot repository virtual disk for which you want to increase the capacity 3 Select Virtual D isk Increase C apacity K NOTE If no free capacity or unconfigured capacity is available the Increase Capacity option is disabled The Increase Snapshot Repository C apacity window displays the Virtual disk attributes T he snapshot repository virtual disk name the associated snapshot virtual disk name the associated source virtual disk capacity and name the current capacity and the amount of free capacity that is available for the selected snapshot repository virtual disk is displayed If free capacity is available the maximum free space is displayed in the Increase capacity by field If free capacity does not exist on the disk group the free space that is displayed in the Increase capacity by spinner box is 0 You must add physical disks to create free capacity on the disk group 4 To increase capacity of the snapshot repository virtual disk use one of these methods e Usethe free capacity on the disk group of the snapshot repository virtual disk Go to step 5 e Add unconfigured capacity or physical disks to the disk group of the snapshot repository virtual disk Go to step 7 5 In Increase capacity by enter or select the appropriate capacity 6 Click OK The Logical tab is updated T he snapshot repository virtual disk having its capacity increased s
41. disks on the Physical tab e Manually unassign individual physical disks to unassign the selected hot spare physical disks on the Physical tab See step 12 To assign hot spares in the H ot Spare C overage window select a disk group in the H ot spare coverage area Review the information about the hot spare coverage in the D etails area Click Assign The Assign H ot Spare window is displayed Select the relevant physical disks in the U nassigned physical disks area as hot spares for the selected disk and click OK To unassign hot spares in the H ot Spare C overage window select the physical disks in the H ot spare physical disks area Review the information about the hot spare coverage in the D etails area Click Unassign A message prompts you to confirm the operation Type yes and click OK Hot Spares and Rebuild A valuable strategy to protect data is to assign available physical disks in the storage array as hot spares A hot spare adds another level of fault tolerance to the storage array Configuration Disk Groups and Virtual Disks 115 A hot spare is an idle powered on stand by physical disk ready for immediate use in case of disk failure If a hot spare is defined in an enclosure in which a redundant virtual disk experiences a physical disk failure a rebuild of the degraded virtual disk is automatically initiated by the RAID controller modules If no hot spares are defined the rebuild process is initiated b
42. firmware and the current NVSRAM versions respectively To locate the directory in which the file to download resides click Select File In the File Selection area select the file to download By default only the downloadable files that are compatible with the current storage array configuration are displayed W hen you select a file in the File Selection area of the dialog applicable attributes if any of the file are displayed in the File Information area The attributes indicate the version of the file If you want to download an NVSRAM file with the firmware select Transfer NVSRAM file with RAID controller module firmware and click Select File next to Selected NVSRAM file To transfer the files to the RAID controller module without activating them click Transfer files but don t activate them activate later M anagement Firmware Downloads 7 10 11 Click Transfer Keep these guidelines in mind If the Transfer button is inactive ensure that you either select an NVSRAM file or deselect the Transfer NVSRAM file with RAID controller module firmware option If the file selected is not valid or isnot compatible with the current storage array configuration the File Selection E rror dialog is displayed Click OK to close it and choose a compatible firmware or NVSRAM file In the C onfirm D ownload dialog click Yes The download starts Perform one of these actions Select Tools U pgrade RAID C ontroll
43. in cache sizes is detected by the RAID controller module After the condition is cleared the cache properties selected in the dialog become active If the selected cache properties do not become active contact your Technical Support representative If you select more than one virtual disk the cache settings default to no settings selected The current cache settings are displayed only if you select a single virtual disk If you change the cache settings by using this option the priority of all of the virtual disks that you selected is modified Configuration Disk Groups and Virtual Disks 101 To change the virtual disk cache settings 102 1 2 In the AM W select the Logical tab and select a virtual disk In the toolbar select Virtual D isk gt C hange gt C ache Settings The C hange C ache Settings window is displayed Select one or more virtual disks To select nonadjacent virtual disks press lt Ctrl gt click To select adjacent virtual disks press lt Shift gt click To select all of the available virtual disks click Select All In the Select cache properties area you can select Enable read caching to enable read caching Enable dynamic cache read prefetch to enable dynamic cache read prefetch Enable write caching to enable write caching Enable write caching with mirroring to mirror cached data across two redundant RAID controller modules that have the same cache size e
44. in the storage array After locating the storage array click OK The LEDs stop blinking If the LEDs do not stop blinking select Storage Array Blink Stop All Indications Configuration About Your Storage Array 69 4 A confirmation message is displayed Click OK Naming or Renaming Storage Arrays Each storage array must be assigned a unique up to 30 character alphanumeric name A name can consist of letters numbers and the special characters underscore _ dash and pound sign No other special characters are allowed To rename a selected storage array 1 70 Perform one of these actions e IntheAMW Setup tab select Rename Storage Array e IntheEMW Devices tab Tree view select Edit Rename e IntheEMW Devicestab Table view select Edit Rename e IntheEMW Devices tab Tree view right click on the desired array icon and select Rename The Name Rename Storage Arrays dialog is displayed Select the relevant storage array from the Select storage array table If you do not know the name or physical location of the storage array click Blink After locating the storage array click OK to turn off the LEDs The name of the storage array is displayed in the Storage array name In Storage array name type the new name of the storage array If applicable add a comment for the storage array in Additional comment Click Apply A message is displayed warning you about the implications of changing
45. locks option to synchronize the storage array RAID controller module clocks with the storage management station This option makes sure that the event timestamps written by the RAID controller modules to the Event Log match the event timestamps written to host log files The RAID controller modules remain available during synchronization To synchronize the RAID controller module clocks with the storage management station 1 Inthe AMW select Storage Array Synchronize RAID C ontroller M odule C locks 2 If apassword is set in the E nter Password dialog type the current password for the storage array and click Synchronize The RAID controller module clocks are synchronized with the storage management station 82 Configuration About Your Storage Array Configuration Event M onitor An event monitor is provided with D ell PowerVault M odular Disk Storage M anager M D SM The event monitor runs continuously in the background and monitors activity on the managed storage arrays If the event monitor detects any critical problems it can notify a host or remote system using e mail Simple Network M anagement Protocol SNM P trap messages or both For the most timely and continuous notification of events enable the event monitor on a management station that runs 24 hours a day Enabling the event monitor on multiple systems or having a combination of an event monitor and MDSM active can result in duplicate events but this does not
46. more information see Defining a Host on page 86 You can also move a host to a different host group For more information see M oving a Host to a Different H ost Group on page 89 Removing a Host From a Host Group You can remove a host from the Topology pane on the M appings tab of the Array M anagement Window For more information see Removing a H ost Group on page 90 M oving a Host to a Different Host Group To move a host to a different host group 1 IntheAMW select the Mappings tab select the host node in the Topology pane 2 Perform one of these actions Select M appings M ove e Right click the host node and select M ove from the pop up menu The M ove H ost dialog is displayed 3 Inthe Select host group select the host group to which you want to move the host The M ove H ost C onfirmation dialog is displayed Configuration About YourHost 89 4 Click Yes The host is moved to the selected host group with the following mappings e The host retains the specific virtual disk mappings assigned to it e Thehost inherits the virtual disk mappings assigned to the host group to which it is moved e The host loses the virtual disk mappings assigned to the host group from which it was moved Removing a Host Group To remove a host group 1 In the AM W select the M appings tab select the host node in the Topology pane Perform one of these actions e Select Mappings Remove e Right c
47. nloading Both RAID Controller and NVSRAM Firmware 190 Downloading Only NVSRAM Firmware 192 12 Contents Downloading Physical Disk Firmware 195 Dow nloading M D1200 Series Expansion Module EMM Firmware 0 0 197 Self M onitoring Analysis and Reporting Technology SMART 0 000 198 Media Errors and UnreadableSectors 198 15 Management Installing Array Components 0 us eer Dekh sere eas 201 Recommended Tools 04 201 Front Bezel Optional 000 202 Removing the Front Bezel 202 Installing the FrontBezel 202 Hard Drives aaa aaa ee 203 Removing aHard DriveBlank 203 Installing a Hard Drive Blank 0 204 RemovingaHardDrive 204 InstallingaHardDrive 0 206 Removing a Hard Drive Froma Hard Drive Carrier 2 ee 207 Installing a Hard Drive Into a Hard Drive Carrier 2 ee ee 209 RAID ControllerModule 0 209 Removing a RAID Controller Module Blank 209 Installing a RAID Controller Module Blank 210 Removing a RAID ControllerModule 211 Installing a RAID ControllerModule 212 Opening the RAID ControllerModule 212 Closing the RAID ControllerModule 213 Contents 13 RAID Controller Module Backup Battery Unit Removing the RAID Controller Module Backup Battery Unit 0
48. not covered by your warranty Read and follow the safety instructions that came with the product 1 Turn off the array and host server 2 Disconnect all the power cables connected to the array 3 Removethe RAID controller module See Removing a RAID Controller M odule Blank on page 209 4 Remove the screws from the sides of the RAID controller module See Figure 15 9 5 While pressing the indent slide the cover in the direction of the arrow and lift it away from the RAID controller module See Figure 15 9 212 Management Installing Array Components Figure 15 9 Opening and Closing the RAID Controller Module 1 3 screws 2 2 RAID controller module indent Closing the RAID Controller Module A CAUTION M any repairs may only be done by a certified service technician You mn SP WwW N must only perform troubleshooting and simple repairs as authorized in your product documentation or as directed by the online or telephone service and support team Damage due to servicing that is not authorized by Dell is not covered by your warranty Read and follow the safety instructions that came with the product Place the cover onto the RAID controller module and offset it slightly towards the back so that the hooks on the cover fit over the corresponding slots on the RAID controller module Slide the cover toward the front till it snaps into place See Figure 15 9 Replace the screws on the RAID controller module See Figu
49. number of physical disks are available to support the virtual disk RAID Levels RAID levels determine the way in which data is written to physical disks Different RAID levels provide different levels of accessibility redundancy and capacity 40 Planning M D3200 Series Storage Array Terms and Concepts Using multiple physical disks has the following advantages over using a single physical disk e Placing data on multiple physical disks striping allows input output 1 0 operations to occur simultaneously and improve performance e Storing redundant data on multiple physical disks using mirroring or parity supports reconstruction of lost data if an error occurs even if that error is the failure of a physical disk Each RAID level provides different performance and protection You must select a RAID level based on the type of application access fault tolerance and data you are storing The storage array supports RAID levels 0 1 5 6 and 10 The maximum number of physical disks that can be used in a disk group depends on the RAID level e 192 for RAID levels 0 1 and 10 e 30 for RAID levels 5 and 6 RAID Level Usage To ensure best performance you must select an optimal RAID level when you create a system physical disk The optimal RAID level for your disk array depends on e Number of physical disks in the disk array e Capacity of the physical disks in the disk array e Need for redundant access to the data f
50. omponents dialog click C lose 238 Troubleshooting Your Storage Array Software Finding Nodes You can use the Find option to search for a particular node on the Logical tab the Physical tab or the M appings tab of the AM W The search may be based on a particular node name the RAID level virtual disk capacity or specific free capacity nodes T he search may be based also on one of these combinations e Thenodenameand the RAID level e Thenode name and the virtual disk capacity To find nodes 1 IntheAMW select View Find 2 Based on the type of search select one of these options and go to the indicated step Search by name see step 3 e Search by special criteria see step 4 3 Typethe name of the node to be found in Find Node See step 8 4 Based on the search criteria select one of these options and go to the indicated step e Find all virtual disks with RAID level Go to step 5 e Find all virtual disks with capacity Go to step 6 e Find all free capacity nodes Go to step 7 5 To search for all nodes based on their RAID level perform these steps a Select Find all virtual disks with RAID level b Select the RAID level from the list c Goto step 8 Troubleshooting Your Storage Array Software 239 6 To search for all nodes based on their virtual disk capacity perform these steps a Select Find all virtual disks with capacity b Typethe capacity in the GB box c Specify that the capacity to
51. on the target virtual disk K NOTE If you ordered this feature you received a Premium Feature Activation card that shipped in the same box as your Dell PowerVault M D storage array Follow the directions on the card to obtain a key file and to enable the feature K NOTE The preferred method for creating a virtual disk copy is to copy from a snapshot virtual disk This allows the original virtual disk used in the snapshot operation to remain fully available for read write activity while the snapshot is used as the source for the virtual disk copy operation W hen you create a virtual disk copy you create a copy pair that has a source virtual disk and a target virtual disk on the same storage array The source virtual disk is the virtual disk that contains the data you want to copy The source virtual disk accepts the host I O read activity and stores the data until it is copied to the target virtual disk The source virtual disk can be a standard virtual disk a snapshot virtual disk or the source virtual disk of a snapshot virtual disk W hen you start a virtual disk copy all data is copied to the target virtual disk and the source virtual disk permissions are set to read only until the virtual disk copy is complete The target virtual disk is a virtual disk to which you copy data from the source virtual disk The target virtual disk can be a standard virtual disk or the source virtual disk of a failed or disabled snapshot virtual d
52. port identifier and the associated host To manage a host port identifier 1 Perform one of these actions e Right click the host in the Topology pane and select M anage H ost Port Identifiers in the pop up menu From the menu bar select M appings M anage H ost Port Identifiers The M anage H ost Port Identifiers dialog is displayed You can choose to manage the host port identifiers for a specific host or all of the host port identifiers for all of the hosts in Show host port identifiers associated with 2 If you want to manage the host port identifiers for a specific host select the host from the list of hosts that are associated with the storage array If you want to manage the host port identifiers for all hosts select All hosts from the list of hosts that are associated with the storage array 3 If you are adding a new host port identifier go to step 4 If you are managing an existing host port identifier go to step 8 4 Click Add The Add H ost Port Identifier dialog is displayed Configuration About YourHost 93 5 Select the method to add a host port identifier to the host You can select Add by selecting a know unassociated host port identifier Select the appropriate host port identifier from the existing list of Known unassociated host port identifiers Add by creating a new host port identifier n New host port identifier enter the name of the new host port identifier 6 In User label enter
53. processes the processes on the failed controller are transferred to the peer controller A transferred process is placed in a suspended state if there are four active processes on the peer controller The suspended processes are resumed on the peer controller when the number of active processes falls below four Disk Group Operations RAID Level Migration You can migrate from one RAID level to another depending on your requirements For example fault tolerant characteristics can be added to a stripe set RAID 0 by converting it to a RAID 5 set M DSM provides information about RAID attributes to assist you in selecting the appropriate RAID level You can perform a RAID level migration while the system is still running and without rebooting which maintains data availability Segment Size Migration Segment size refers to the amount of data in KB that the storage array writes on asingle physical disk in a virtual disk before writing data on the next physical disk Valid values for the segment size are 8 KB 16 KB 32 KB 64KB 128 KB 256 KB and 512 KB Planning MD3200 Series Storage Array Terms andConcepts 45 Dynamic segment size migration enables the segment size of a given virtual disk to be changed A default segment size is set when the virtual disk is created based on such factors as the RAID level and expected usage You can change the default value 128 KB if segment size usage does not match your needs W hen considerin
54. redundancy data to reconstruct the data from the failed physical disk to the hot spare physical disk W hen you have physically replaced the failed physical disk a copyback operation occurs from the hot spare physical disk to the replaced physical disk 116 Configuration Disk Groups and Virtual Disks If there are secure disk groups and security capable disk groups in the storage array the hot spare physical disk must match the security capability of the disk group For example anon security capable physical disk cannot be used as a hot spare for a secure disk group K NOTE For a security capable disk group security capable hot spare physical disks are preferred If security capable physical disks are not available non security capable physical disks may be used as hot spare physical disks To ensure that the disk group is retained as security capable the non security capable hot spare physical disk must be replaced with a security capable physical disk If you select a security capable physical disk as hot spare for a non secure disk group a dialog box is displayed indicating that a security capable physical disk is being used as a hot spare for a non secure disk group The availability of enclosure loss protection for a disk group depends on the location of the physical disks that comprise the disk group T he enclosure loss protection may be lost because of a failed physical disk and location of the hot spare physical disk To mak
55. repository full percentage level is 50 of the source virtual disk Snapshot Repository Virtual Disk Full C onditions W hen the snapshot repository virtual disk is full you are given a choice of failing write activity to the source virtual disk or failing the snapshot virtual disk Preparing Host Servers to Create the Snapshot Using the Simple Path K NOTE Before using the Snapshot Virtual Disks Premium Feature in a M icrosoft Windows clustered configuration you must first map the snapshot virtual disk to the cluster node that owns the source virtual disk This ensures that the cluster nodes correctly recognize the snapshot virtual disk Configuration Premium Feature Snapshot Virtual Disks 143 K NOTE M apping the snapshot virtual disk to the node that does not own the source virtual disk before the Snapshot enabling process is completed can result in the operating system mis identifying the snapshot virtual disk This in turn can result in data loss on the source virtual disk or an inaccessible snapshot K NOTE For more information on mapping the snapshot virtual disk to the secondary node see the De PowerVault M D3200 and M D3220 Storage Arrays With Microsoft Windows Server Failover Clusters at dell com support manuals K NOTE You can create concurrent snapshots of a source virtual disk on both the source disk group and on another disk group Before creating a Snapshot Virtual D isk e The following types of v
56. rollback did not resume successfully the rollback operation pauses again and both virtual disks display Needs Attention icons Check the M ajor Event Log M EL for details and follow the Recovery Guru procedure to correct the issue 160 Configuration Premium Feature Snapshot Virtual Disks Canceling a Snapshot Rollback A WARNING Risk of data loss If you cancel a snapshot rollback in progress the base virtual disk may remain in an unusable state and the snapshot virtual disk is displayed as failed in the M D storage management softw are Therefore do not cancel a snapshot rollback unless reliable recovery options exist for restoring the content of the base virtual disk 1 In the array management window select the L ogical tab 2 Choose one e Select the snapshot virtual disk and select Virtual D isk Snapshot Cancel Rollback e Right click the snapshot virtual disk and select C ancel Rollback The Confirm Cancel Rollback dialog is displayed 3 To cancel the snapshot rollback type yes in the confirmation box and click OK 4 Click Yes to cancel the rollback operation Configuration Premium Feature Snapshot Virtual Disks 161 162 Configuration Premium Feature Snapshot Virtual Disks Configuration Premium Feature Virtual Disk Copy K NOTE A virtual disk copy overwrites data on the target virtual disk Before starting a virtual disk copy ensure that you no longer need the data or back up the data
57. s fault indicator is lit see Getting Help on page 265 7 CAUTION Power supply cooling fan modules are hot swappable The array can operate ona single power supply how ever both modules must be installed to ensure proper cooling A single power supply cooling fan module can be removed from a powered on array for a maximum period of 5 minutes Beyond that time the array may automatically shut down to prevent damage 2 Reseat the power supply by removing and reinstalling it See Power Supply and Cooling Fan Features on page 29 NOTE After installing a power supply allow several seconds for the array to recognize the power supply and to determine if itis working properly If the problem is not resolved see G etting H elp on page 265 254 Troubleshooting Your Array Troubleshooting Array Cooling Problems A CAUTION M any repairs may only be done by a certified service technician You must only perform troubleshooting and simple repairs as authorized in your product documentation or as directed by the online or telephone service and support team Damage due to servicing that is not authorized by Dell is not covered by your warranty Read and follow the safety instructions that came with the product Ensure that none of the following conditions exist Array cover or drive blank is removed Ambient temperature is too high See Technical Specifications in the Getting Started Guide External airflow is obstructed
58. selected storage arrays in the Performance M onitor data table T he table is updated at the interval specified in the Polling Interval setting Click Update to force an immediate poll of the storage array Click Stop to stop monitoring the storage array Click Save As on the Performance M onitor main dialog to save the currently displayed performance statistics Select an appropriate directory Type a file name in the File name text box NOTE The perf extension is the default Select a file type from the Files of type list e Usethe Report format ASCII text file type if you want to save the data to a report form for viewing or printing e UsetheC omma D elimited Format file type if you want to save the data in a form that can be imported into a commercial spreadsheet application for further analysis M ost leading commercial spreadsheet applications recognize a comma delimiter T hese applications use the delimiter to import the data into spreadsheet cells Planning M D3200 Series Storage Array Terms and Concepts 12 Click Save The Performance M onitor data provides information about how your storage array is performing The data is presented in eight columns which are described in this table Use this data to make performance tuning decisions for your storage array Table 4 3 Performance Monitor Table Description Column Headings Description Devices Controller virtual disk or storage array total Total IO
59. standard virtual disks During a virtual disk copy resources for the storage array are diverted from processing I O activity to completing a virtual disk copy This affects the overall performance of the storage array W hen you create a new virtual disk copy you define the copy priority to determine how much controller processing time is diverted from I O activity to a virtual disk copy operation 172 Configuration Premium Feature Virtual Disk Copy Setting Copy Priority You can use the C opy M anager to select the rate at which a virtual disk copy completes for a selected copy pair You can change the copy priority for a copy pair at any of these times e Before the virtual disk copy begins e While the virtual disk copy has a status of In Progress e When you re create a virtual disk copy To set copy priority 1 Inthe AMW select Virtual D isk C opy M anager The C opy M anager window is displayed 2 Inthe table select one or more copy pairs 3 Select Change C opy Priority The C hange C opy Priority window is displayed 4 Inthe C opy priority area select the appropriate copy priority depending on your system performance needs K NOTE There are 5 copy priority rates available lowest low medium high and highest If the copy priority is set at the lowest rate I O activity is prioritized and the virtual disk copy takes longer Stopping a Virtual Disk Copy You can stop a virtual disk copy operation that has
60. system testing or to copy data to another device such as a tape drive or other media K NOTE Recovering froma backup copy You can use the Edit Host to Virtual Disk M appings feature to recover data from the backup virtual disk you created in the previous procedure The M appings option enables you to unmap the source virtual disk from its host and then to map the backup virtual disk to the same host Types of Virtual Disk Copies You can perform either offline or online virtual disk copies To ensure data integrity all 1 O to the target virtual disk is suspended during either type of virtual disk copy operation After the virtual disk copy is complete the target virtual disk automatically becomes read only to the hosts Offline Copy An offline copy reads data from the source virtual disk and copies it to a target virtual disk while suspending all updates to the source virtual disk when the copy isin progress In an offline virtual disk copy the relationship is between a source virtual disk and a target virtual disk Source virtual disks that are participating in an offline copy are available for read requests while the virtual disk copy displays the In Progress or Pending status W rite requests are allowed only after the offline copy is complete If the source virtual disk is 164 Configuration Premium Feature Virtual Disk Copy formatted with ajournaling file system any attempt to issue a read request to the source virtu
61. the AM W 240 Troubleshooting Your Storage Array Software 1 On the Logical tab of the AM W select one of these virtual disks and go to the indicated step e Snapshot virtual disk Go to step 2 Snapshot repository virtual disk Go to step 3 e Source virtual disk Go to step 4 e Target virtual disk Go to step 5 2 Select View Go To gt Snapshot Virtual Disk The selection jumps to the associated snapshot virtual disk in the Logical pane 3 Select View Go To gt Snapshot Repository Virtual D isk The selection jumps to the associated snapshot repository virtual disk in the Logical pane 4 Select View gt Go To Source Virtual D isk The selection jumps to the associated source virtual disk in the L ogical pane 5 Select View Go To Target Virtual Disk K NOTE Ifthe source virtual disk has more than one associated target virtual disk select the target virtual disk that you want from the list and click OK The selection jumps to the associated target virtual disk in the Logical pane Recovering From an Unresponsive Storage Array Condition A storage array can have an Unresponsive status for several reasons Use the procedure in this topic to determine a possible cause and solution MDSM can take up to 5 minutes to detect that a storage array has become unresponsive or becomes responsive again Before completing this procedure make sure that you wait some time before you decide that the storage ar
62. the Tree view or the Table view on the D evices tab in the EMW select a node and then select E dit C onfigure Alerts Go to step 3 e In the Setup tab in the EM W select Configure Alerts Go to step 2 2 Select one of the following radio buttons to specify an alert level e All storage arrays Select this option to send an alert e mail about events on all storage arrays e An individual storage array Select this option to send an alert e mail about events that occur on only a specified storage array These results occur depending on your selection e If you selected all storage arrays the C onfigure Alerts dialog is displayed e If you selected An individual storage array the Select Storage Array dialog is displayed Select the storage array for which you want to receive e mail alerts and click OK The C onfigure Alerts dialog is displayed e If you do not know which storage array to select click Blink to turn on the LEDs of the storage array 3 Inthe C onfigure Alerts dialog select the M ail Server tab 4 In Mail server type the name of the Simple M ail Transfer Protocol SMTP mail server The SMTP mail server is the name of the mail server that forwards the alert e mails to the configured e mail addresses 5 In Email sender address type the valid sender e mail address The e mail address of the sender the network administrator is displayed on each e mail alert sent to the destination Configuration Abou
63. the appropriate option depending on your requirement K NOTE If you have purchased a Dell system you may be asked for the Service Tag Getting Help 265 Documentation Feedback If you have feedback for this document write to documentation_feedback dell com Alternatively you can click on the Feedback link in any of the Dell documentation pages fill up the form and click Submit to send your feedback 266 Getting Help Index A Access Virtual Disk 66 Advanced Feature Using Snapshot and Disk C opy Together 54 Advanced Features 50 Snapshot Repository Virtual Disk 52 Snapshot Virtual Disks 51 Advanced Path 146 Array M anagement Types In Band M anagement 66 Out of Band M anagement 65 B backplane installing 224 removing 221 Battery Settings 81 C Change Controller Ownership of the Virtual Disk 122 1 0 Type 104 RAID Controller M odule Ownership of a Disk Group 123 RAID Controller M odule Ownership of a Virtual Disk or a Disk Group 127 RAID Level of aDisk Group 124 129 Segment Size of a Virtual Disk 103 Virtual Disk Cache Settings 101 Virtual Disk M odification Priority 100 Choosing an Appropriate Physical Disk Type 105 Configuring Host Access 85 Hot Spare Physical Disks 114 Configuring Alert Notifications SNMP 79 Contacting Dell 265 contacting Dell 265 control panel installing 220 removing 218 Copy M anager 170 Index 26 7 D Defini
64. the multipath device topology See Display the M ultipath D evice Topology Using the M ultipath Command on page 181 3 Create a partition on a multipath device node See C reate a N ew fdisk Partition on a M ultipath D evice Node on page 183 4 Add apartition to DM See Add a New Partition to Device M apper on page 183 5 Create a file system on aDM partition See Create a File System on a Device M apper Partition on page 184 6 MountaDM partition See M ount a Device M apper Partition on page 184 The following instructions show how to complete each of these steps In the following command descriptions lt x gt is used to indicate where a substitution must be made On RHEL systems lt x gt is the number assigned to the device On SLES systems lt x gt is the letter s assigned to the device Scan for Newly Added Virtual Disks The rescan_dm_devs command scans the host server system looking for existing and newly added virtual disks mapped to the host server rescan_dm_devs If an array virtual disk VD is mapped to the host server at a later time the rescan_dm_devices command must be run again to make the VD a visible LUN to the operating system Display the Multipath Device Topology Using the Multipath Command The multipath command adds newly scanned and mapped virtual disks to the Device M apper tables and creates entries for them in the dev mapper directory on the host server T hese devices are the same
65. the virtual disk copy is completed or is stopped ownership of the target virtual disk is restored to its preferred RAID controller module If ownership of the source virtual disk is changed during the virtual disk copy ownership of the target virtual disk is also changed Under certain operating system environments it may be necessary to reconfigure the multi path driver before an I O path can be used To change the RAID controller module ownership of a disk group 1 IntheAMW select the Logical tab and select a disk group 2 Select Disk G roup C hange O wnership Preferred Path 3 Select the appropriate RAID controller module slot and click Yes to confirm the selection A CAUTION Possible loss of data access Changing ownership at the disk group level causes every virtual disk in that disk group to transfer to the other RAID controller module and use the new 1 0 path If you do not want to set every virtual disk to the new path change ownership at the virtual disk level instead Configuration Disk Groups and Virtual Disks 123 The ownership of the disk group is changed I O to the disk group is now directed through this O path You are finished with this procedure K NOTE The disk group may not use the new 1 0 path until the multi path driver reconfigures and recognizes the new path This action usually takes less than 5 minutes Changing the RAID Level of a Disk Group Changing the RAID level of a disk group changes th
66. to move disk groups and virtual disks K Hot virtual disk migration D isk migration with the destination storage array power turned on Cold virtual disk migration D isk migration with the destination storage array power turned off NOTE To ensure that the migrating disk groups and virtual disks are correctly recognized when the target storage array has an existing physical disk use hot virtual disk migration W hen attempting virtual disk migration follow these recommendations A M oving physical disks to the destination array for migration W hen inserting drives into the destination storage array during hot virtual disk migration wait for the inserted physical disk to be displayed in M D SM before inserting the next physical disk WARNING Without the delay betw een drive insertions the storage array can become unstable and manageability is temporarily lost Migrating virtual disks from multiple storage arrays into a single storage array W hen migrating virtual disks from multiple or different storage arrays into a single destination storage array move all of the physical disks from the same storage array as a set into the new destination storage array Ensure that all of the physical disks from a storage array are migrated to the destination storage array before starting migration from the next storage array K NOTE If the drive modules are not moved as a set to the destination storage array the newly rel
67. up to 30 character alphanumeric name 7 In Associated with host select the appropriate host or host group 8 Select the host port identifier that you would like to manage from the list of host port identifiers in the H ost port identifier information area 9 Perform one of these actions for the selected host port identifier e To edit the host port identifier Select the appropriate host port identifier and click E dit the E dit H ost Port Identifier dialog is displayed update U ser label and Associated with host and click Save e To replace the host port identifier Select the appropriate host port identifier and click Replace the Replace H ost Port Identifier dialog is displayed replace the current host port identifier with a known unassociated host port identifier or create a new host port identifier update User label and click Replace e Toremove the host port identifier Select the appropriate host port identifier and click E dit the Remove H ost Port Identifier dialog is displayed type yes and click OK For more information see the PowerVault M odular Disk Storage M anager online help topics 94 Configuration About Your Host Configuration Disk Groups and Virtual Disks Creating Disk Groups and Virtual Disks Disk groups are created in the unconfigured capacity of a storage array and virtual disks are created in the free capacity of a disk group The maximum number of physical disks supported in a disk group i
68. virtual disks within the disk group marks them as missing H owever the disk groups themselves migrate to the target array An array can import a virtual disk only if it isin an optimal state You can move virtual disks that are part of a disk group only if all members of the disk group are being migrated T he virtual disks automatically become available after the target array has finished importing all the disks in the disk group W hen you migrate a physical disk or a disk group from one M D 3200 array to another the M D 3200 array you migrate to recognizes any data structures and or metadata you had in place on the migrating M D 3200 array H owever if you are migrating from any device other than a M D 3200 Series storage array 48 Planning M D3200 Series Storage Array Terms and Concepts the M D 3200 Series storage array does not recognize the migrating metadata and that data is lost In this case the M D 3200 Series storage array initializes the physical disks and marks them as unconfigured capacity K K NOTE Only disk groups and associated virtual disks with all member physical disks present can be migrated from one storage array to another it is recommended that you only migrate disk groups that have all their associated member virtual disks in an optimal state NOTE The number of physical disks and virtual disks that a storage array supports limits the scope of the migration Use either of the following methods
69. 0 11 12 13 14 15 16 a Mm Item Component Function 1 ou A WwW N N 32 SAS OUT port SAS IN port 0 SAS IN port 1 SAS IN port 2 SAS IN port 3 MAC Address label D ebug port SAS OUT port link fault LE D Provides SAS connection for cabling to a downchain expansion enclosure Provides host to controller SAS connection Provides host to controller SAS connection Provides host to controller SAS connection Provides host to controller SAS connection Provides M AC addresses of the management port Dell support only Lights green when all four links are connected Lights amber when one to 3 links are disconnected Off when all links in the port are disconnected or cable is disconnected Planning RAID Controller M odules Item Component Function 9 10 11 12 13 14 15 16 17 Controller power LED SAS IN 0 port link fault LE D Controller fault LED System identification LED SAS IN 1 port link fault LE D Cache active or cache offload LED Battery fault Password Reset switch SAS IN 2 port link fault LE D Lights green when controller power is on Off when controller is not powered Lights green when all four links are connected Lights amber when one to 3 links are disconnected Off when all links in the port are disconnected or cable is disconnected Lights amber when controller fault detected Off when controller operating normally
70. 00 Series storage array e SAS cables e Power cables 2 e Front Bezel optional e Mounting rails 2 optional e MD 3200 Series resource media e Rack Installation Instructions e Getting Started With Your System provides an overview of enclosure features setting up your enclosure and technical specifications M D3200 Series Storage Array The Dell PowerVault M D 3200 Series isa 2U rack mounted external redundant array of independent disks RAID storage array capable of accommodating up to twelve 3 5 or twenty four 2 5 6 0 G bps Serial Attached SCSI SAS disks The M D 3200 Series storage arrays can be daisy chained with M D 1200 Series expansion enclosures providing access to a maximum of 120 disks or 192 disks with Premium Feature activation in the entire storage array C onnectivity between the storage array and the host server is provided by a Dell 6 0 G bps SAS Host Bus Adapter SAS 6Gb HBA Dell PowerVault M odular Disk Storage M anager Dell PowerVault M odular Disk Storage M anager M DSM isa graphical user interface GUI application used to configure and manage one or more M D 3200 Series Storage Arrays The MD SM software is located on the M D 3200 Series resource media Other Information You May Need A WARNING See the safety and regulatory information that shipped with your system Warranty information may be included within this document or as a separate document 20 Introduction The Getting Started
71. 5 times per sequence update the firmware to the latest supported firmware on both the EM Ms For more information about downloading the latest firmware see M anagement Firmware Downloads on page 189 e If the link status LEDs are not green a b c Turn off the server Reseat the cables on the expansion array and the server Turn on the expansion arrays and then the storage array and wait until the system is fully booted Turn on the server Check the link status LED If the link status LED is not green replace the cables If the problem is not resolved see Getting Help on page 265 Troubleshooting RAID Controller M odules VAN CAUTION Many repairs may only be done by a certified service technician You must only perform troubleshooting and simple repairs as authorized in your product documentation or as directed by the online or telephone service and support team Damage due to servicing that is not authorized by Dell is not covered by your warranty Read and follow the safety instructions that came with the product VAN CAUTION In the case of non redundant configurations itis recommended that you turn off the host server before turning off the array to prevent loss of data 256 Troubleshooting Your Array If the array status LED is solid or blinking amber a f g h In the AM W select the Summary tab and click on Storage Array needs attention Follow the listed procedures in the Recovery Guru s
72. 86 DefiningaHost 0004 86 Removing Host Access 004 88 M anaging Host Groups 004 88 CreatingaHostGroup 88 Moving a Host to a DifferentHostGroup 89 RemovingaHostGroup 90 HostTopology 00 90 Starting or Stopping the Host Context Agent Swe ay AAS oe 91 I O Data Path Protection 92 Managing Host Portidentifiers 93 9 Configuration Disk Groups and Virtual DISKS 2 26 3 bog ete wot cts wl 95 Creating Disk Groups and Virtual Disks 95 Contents Contents Creating DiskGroups Locating a Disk Group Creating VirtualDisks 00 Changing the Virtual Disk Modification Priority aaa aaa Changing the Virtual Disk Cache Settings Changing the Segment Size of a Virtual DISK rvs c5 45 8 es Be tee Changing the 1 0 Type Choosing an Appropriate Physical Disk Type Physical Disk Security with Self Encrypting Disk 0 0 00 Creating aSecurityKey ChangingaSecurityKey SavingaSecurityKey Validate SecurityKey 0 Unlocking Secure Physical Disks Erasing Secure Physical Disks Configuring Hot Spare Physical Disks Hot Spares andRebuild GlobalHotSpares 0 Hot Spare Operation 0 4 Hot Spare Drive Protection
73. AID 10 42 RAID 5 42 RAID 6 42 Usage 41 RAID Background Operations Priority 47 recommended tools 201 removing backplane 221 control panel MD 1200 218 drive blank 203 EMM 211 EMM blank 209 front bezel 202 hard drive 204 hard drive from a drive carrier 207 power supply cooling fan module 216 Removing Copy Pairs 176 Removing Host Access 88 Restricted M appings 126 Index 270 S Safety 19 safety 253 Security Key Changing 110 Creating 108 Saving 111 Segment Size 43 Setting a Password 71 Setting C opy Priority 173 Simple Path 143 SM ART 39 SM repassist Utility 247 Snapshot Repository Capacity 152 Snapshot Virtual D isk Creating using advanced path 143 Creating using simple path 142 Snapshot Virtual Disks Disabling 155 Re creating 157 Starting or Stopping the Host Context Agent 91 Storage Array RAID Controller M odule Clocks 82 Storage Array M edia Scan 136 Storage Arrays 66 Automatic Discovery 67 M anual Addition 67 Storage Partitioning 130 support contacting Dell 265 telephone numbers 265 Troubleshooting Automatically C ollect the Support Bundle Data 233 Capturing the State Information 246 Collecting the Physical Disk Data 234 Device Health Conditions 229 Event Log 234 Finding Nodes 239 Locating an Expansion Enclosure 245 Recovering from an Unidentified Storage Array 248 Recovering from an Unresponsive Storage Array
74. AUTION M any repairs may only be done by a certified service technician You must only perform troubleshooting and simple repairs as authorized in your product documentation or as directed by the online or telephone service and support team Damage due to servicing that is not authorized by Dell is not covered by your warranty Read and follow the safety instructions that came with the product K NOTE If you remove a fully functioning power supply cooling fan module the fan speed in the remaining module increases significantly to provide adequate cooling The fan speed decreases gradually when a new power supply cooling fan module is installed 1 Turn off the power supply cooling fan module 2 Disconnect the power cable from the power source 3 Remove the straps that secure the power cable and then disconnect the power cable from the power supply cooling fan module A WARNING The pow er supply cooling fan modules are heavy Use both hands w hile removing the module 4 Press the release tab and pull the power supply out of the chassis 216 Management Installing Array Components Figure 15 11 Removing and Installing a Power Supply Cooling Fan Module N TEANN ISRN DNS SSSRa 3 saa 1 release tab 2 power supply 3 power supply handle Installing a Power Supply Cooling Fan M odule A CAUTION Many repairs may only be done by a certified service technician You must only perform troubleshooting and simple repair
75. Amber Hot Sparein is detected on the physical disk in the 500 ms and Off use or Hot indicated slot 1000ms Spare standby Offline Not applicable The physical disk has either been spun Green flashing down or had a rebuild aborted by user 3000 ms Amber request 3000 ms and Off 3000ms Identify Assigned The physical disk is being identified Green flashing Unassigned 250 ms Hot Spare in use or Hot Spare standby N A N A The indicated slot is empty or the array cannot detect the physical disk If a disk drive rebuild fails because of a source drive failure or because the drive is too small the M DSM reports a failure of the physical disk even though the LED state on the drive indicates the rebuild was aborted green for 3 seconds amber for 3 seconds then off for 3 seconds Self M onitoring Analysis and Reporting Technology SMART monitors the internal performance of all physical disk components to detect faults indicating the potential for physical disk failure SMART uses this information to report whether failure is imminent so that a physical disk can be replaced before failure occurs T he storage array monitors all attached drives and notifies you when a predicted failure is reported by a physical disk Virtual Disks and Disk Groups W hen configuring a storage array you must 1 Organize the physical disks into disk groups 2 Create virtual disks within these disk groups Planning MD3200 Series Stor
76. Condition 241 Recovery Guru 235 Starting or Restarting the Host Agent Software 251 Start Up Routine 229 Storage Array Profile 236 Storage Array Support Data 232 Unidentified Devices 248 Viewing the Logical Associations 238 Viewing the Physical Associations 238 troubleshooting 253 Index 271 connections 259 cooling problems 255 damaged enclosure 261 external connections 253 hard drives 258 loss of communication 253 power supply cooling fan module 254 startup failure 253 wet enclosure 260 U Unconfigured Capacity 133 User Interface AMW 63 EMW 62 Overview 61 Using Go To 240 V Virtual Disk Background Initialization 43 Consistency Check 44 Copy and M odification Operations 169 Copy Restrictions 167 Copying 171 Creating 168 Creating a Copy for an MSCS Shared Disk 166 Cycle Time 44 Failed Copy 169 Foreground Initialization 43 M edia Verification 44 Read W rite Permissions 166 Recopying 174 Recovery 54 Stopping copy 173 Storage Array Performance 172 Virtual Disk Copy Source 53 Virtual Disk Expansion 132 Virtual Disk Initialization 43 Virtual Disk Migration and Disk Roaming Disk Migration 48 Disk Roaming 50 Virtual Disk Operations 43 Virtual Disk Operations Limit 45 Virtual Disk Ownership 55 Virtual Disk States 40 Virtual DiskC opy Target 53 Virtual Disks and Disk Groups 39 Index 272
77. Dell PowerVault M D3200 and M D3220 Storage Arrays Owner s M anual Regulatory M E03 Series and E04 Seri Regulato eae T nd E04 001 Notes Cautions and Warnings K NOTE A NOTE indicates important information that helps you make better use of your computer VAN CAUTION A CAUTION indicates potential damage to hardware or loss of data if instructions are not follow ed A WARNING A WARNING indicates a potential for property damage personal injury or death 2013 Dell Inc Trademarks used in this text Dell the DELL logo PowerEdge PowerVault and OpenManage are trademarks of Dell Je Intel is a registered trademarks of Intel Corporation in the U S and other countries Microsoft Windows Windows Server MS DOS and Internet Explorer are either trademarks E registered trademarks of Microsoft Corporationi in the United States and or other countries Red Hat and Red Hat Enterprise Linux are registered trademarks of Red Hat Inc in the United States and other countries SUSE is a registered trademark of Novell Inc in the United States and other countries Regulatory M odel E03 Series and E04 Series Regulatory Type E03 001 and E04 001 2013 06 Rev A02 Contents 1 WEP OC WCE OM s amp s a2 aeesied a 19 AboutThisDocument 00 19 Inside the box of the Dell Pow erVault M D3200 Series Storage Array 000 20 M D3200 Series StorageArray 20 Dell Pow
78. G uide provides an overview of setting up and cabling your storage array The D eployment G uide provides installation and configuration instructions for both software and hardware The Storage M anager CLI Guide provides information about using the command line interface CLI Resource media contains all system management tools The Systems Support M atrix provides information on supported software and hardware for M D systems T he document is available at dell com support manuals The D ell PowerE dge C luster Documentation is available at dell com support manuals Release notes or readme files are included to provide last minute updates to the enclosure or documentation or advanced technical reference material intended for experienced users or technicians This document as well as the D ell PowerVault MD 1200 Series Installation Guide is available at dell com support manuals for users who incorporate M D 1200 expansion enclosures The Rack Installation Instructions included with your rack solution describes how to install your enclosure into a rack NOTE Always check for updates on dell com support manuals and read the updates first because they often supersede information in other documents Introduction 21 22 Introduction Planning About Your Storage Array Overview The M D 3200 Series storage array is designed for high availability offering redundant access to data storage It features support for both single
79. ID controller module To view the storage array connections 1 From the toolbar in AM W select Storage Array gt View gt C onnections The lt Storage Array gt C onnections dialog is displayed 2 Click the column name to sort the connections according to your preference 3 Click Close If you receive an error message for a port you can use this dialog to identify the components on the port that may have caused the error By isolating these components you prevent accidentally disconnecting components that are still in operation which could cause an interruption in data flow 72 Configuration About Your Storage Array Adding Editing a Comment to an Existing Storage Array A descriptive comment with an applicable storage array name is a helpful identification tool You can add or edit a comment for a storage array in the EMW only To add or edit acomment 1 Inthe EMW select the D evices tab and select the relevant managed storage array 2 Select Edit gt C omment The Edit C omment dialog is displayed 3 Type a 60 character comment 4 ClickOK This option updates the comment in the table view and saves it in your local storage management station file system The comment is not displayed to administrators who are using other storage management stations Removing Storage Arrays You can remove a storage array from the list of managed arrays if you no longer want to manage it from a specific storage management
80. ID level in Select RAID level You can select RAID levels 0 1 10 6 and 5 Depending on your RAID level selection the physical disks available for the selected RAID level is displayed in Unselected physical disks table In the Unselected physical disks table select the appropriate physical disks and click Add K NOTE You can select multiple physical disks at the same time by holding lt Ctrl gt or Shift gt and selecting additional physical disks To view the capacity of the new disk group click C alculate C apacity Click Finish A message prompts you that the disk group is successfully created and that you must create at least one virtual disk before you can use the capacity of the new disk group For more information on creating virtual disks see Creating Virtual Disks on page 98 Configuration Disk Groups and Virtual Disks 97 Locating a Disk Group You can physically locate and identify all of the physical disks that comprise a selected disk group An LED blinks on each physical disk in the disk group To locate a disk group 1 In the AM W select the Logical tab 2 Select the appropriate disk group and from the toolbar select Disk Group Blink The LEDs for the selected disk group blink After locating the disk group click OK The LEDs stop blinking If the LEDs for the disk group do not stop blinking from the toolbar in AMW select Storage Array Blink Stop All Indications If the LEDs successful
81. M apper software components are installed on a Linux host server by running the M D3200 Series Resource media installation program on the server and selecting either the Full or Host install option For detailed installation procedures see the De PowerVault M D3200 and M D3220 storage arrays Deployment Guide at dell com support manuals Benefits of using DM M ultipath include e Detects path failure and re routes I O to other available paths e Revalidates failed paths after path restoration e Utilizes multiple available paths to maximize performance e Reconfigures path usage based on path states and error conditions e Unifies multiple device nodes into a single logical multipath device node e Indentifies anew multipathed LU and automatically configures a new multipath node e Provides device name persistency for DM devices under dev mapper Configuration Device Mapper Multipath for Linux 179 Using DM Multipathing Devices K NOTE Using or modifying any nodes other than the multipathing device nodes can result in array or file system problems including loss of communication with the array and corruption of the file system Avoid accessing any device other than the multipathing device NOTE After creating a partition on a multipathing device all 10 operations including filesystem creation raw I O and file system I O must be done through the partition node not the multipathing device nodes Prerequisite Steps The fol
82. M firmware You can select more than one storage array K NOTE The Details pane shows the details of only one storage array ata time If you select more than one storage array in the Storage array pane the details of the storage arrays are not shown in the Details pane 9 Click NVSRAM in the D ownload area K NOTE If you selecta storage array that cannot be upgraded the NVSRAM button is disabled The Download NVSRAM dialog is displayed T he current firmware version and the NVSRAM version of the selected storage arrays is displayed K NOTE If you select the storage arrays with different RAID controller module types that cannot be updated with the same NVSRAM file and click NVSRAM the Incompatible RAID Controller M odules dialog is displayed Click OK to close the dialog and select the storage arrays with similar RAID controller module types 10 To locate the directory in which the NVSRAM file to download resides click Browse in the Select file area The Select File dialog is displayed 11 Select the file to download and click OK Any attributes of the NVSRAM file is displayed in the NVSRAM file information area The attributes indicate the version of the NVSRAM file 12 Click OK The Confirm D ownload dialog is displayed 13 Click Yes The download starts and a progress indicator is displayed in the Status column of the U pgrade RAID C ontroller M odule Firmware window 194 M anagement Firmware Downloads
83. Premium Feature Snapshot Virtual Disks 10 11 Ea 12 In the AM W select the Logical tab and select a valid source virtual disk Select Virtual D isk gt Snapshot C reate Alternatively you can right click the source virtual disk and select C reate Snapshot Virtual Disk from the pop up menu The C reate Snapshot Virtual D isk Wizard Introduction dialog is displayed Select Simple Recommended and click Next The Specify Snapshot Schedule window is displayed Select Yes to set up a schedule for the new snapshot virtual disk creation To go to this option and create the snapshot immediately select No If you specified a snapshot schedule define the schedule details in the Create Snapshot Schedule window and click Next Enter the Snapshot virtual disk name and the Snapshot repository virtual disk name and click Next The Specify Snapshot Repository C apacity window is displayed Enter the snapshot repository virtual disks capacity as a percentage of the source virtual disks capacity and click Next The Preview window containing the summary of the snapshot virtual disk is displayed Click Finish The C ompleted window is displayed Click OK After creating one or more snapshot virtual disks mount the source virtual disk and restart the host application using that source virtual disk In the AM W select the M appings tab assign mappings between the snapshot virtual disk and the host that accesses the s
84. RAID controller modules assign static IP addresses The addresses assigned are 192 168 128 101 for controller 0 and 192 168 128 102 for controller 1 Configuration About Your Storage Array 65 In Band Management Using in band management commands events and data travel through the host to controller interface Unlike out of band management commands and events are mixed with data K NOTE For detailed information on setting up in band and out of band management see the Deployment Guide W hen you add storage arrays by using this management method you need to specify only the host name or IP address of the host After you add the specific host name or IP address the host agent software automatically detects any storage arrays that are connected to that host VAN CAUTION Some operating systems can be used only as storage management stations For more information about the operating system that you are using see the MD PowerVault Support M atrix at dell com support manuals For more information see the PowerVault M odular Disk Storage M anager online help topics Access Virtual Disk Each RAID controller module in an M D 3200 Series storage array maintains a special virtual disk called the access virtual disk T he host agent software uses the access virtual disk to communicate management requests and event information between the storage management station and the RAID controller module in an in band managed storage array T h
85. Recovery Guru option provides a detailed explanation of the conditions and the applicable steps to remedy any Needs Attention status For more information see Recovery Guru on page 235 For the status of a storage array the icons shown in the following table are used in the Tree view the Table view and both the EM W Status Bar and the AMW Status Bar Table 18 2 Status Icon Status Icon Description Optimal 7 Each component in the managed storage array is in the desired working condition Needs Attention There is a problem with the managed storage array that requires your intervention to correct it Unresponsive ase The storage management station cannot communicate with the storage array or one RAID controller module or both RAID controller modules in the storage array Fixing Status P A Needs Attention status is corrected and the managed storage array is currently transitioning to an Optimal state Unsupported T he node is currently not supported by this version of MDSM Software amp 4 The storage array is running a level of software that is Unsupported iy no longer supported by MDSM 230 Troubleshooting Your Storage Array Software In the Table view every managed storage array is listed once regardless of the number of attachments it has in the Tree view After the storage array is contacted by M DSM an icon representing its hardware status is displayed Hardware status can be Optimal Needs Attenti
86. Virtual Disks c Select Disk G roup C hange O wnership Preferred Path Alternatively you can right click the disk group and select C hange gt Ownership Preferred Path from the pop up menu d Select the RAID controller module A CAUTION Possible loss of data access Changing ownership at the disk group level causes every virtual disk in that disk group to transfer to the other RAID controller module and use the new 1 0 path If you do not want to set every virtual disk to the new path change ownership at the virtual disk level instead e Click Yes The ownership of the disk group is changed I O to the disk group is now directed through this 1 O path You are finished with this procedure NOTE The disk group may not use the new 1 0 path until the multi path driver reconfigures and recognizes the new path This action usually takes less than 5 minutes Changing the RAID Level of a Disk Group Use the C hange gt RAID Level option to change the RAID level on a selected disk group Using this option changes the RAID levels of every virtual disk that comprises the disk group Performance may be slightly affected during the operation Keep these guidelines in mind when you change the RAID level of a disk group e You cannot cancel this operation after it begins e Thedisk group must bein Optimal status before you can perform this operation e Your data remains available during this operation e If you do not hav
87. a pop up menu and select View gt Associated Logical Elements If you select a virtual disk that does not have logical associations with other virtual disks the Associated Logical Elements option is disabled NOTE The View Associated Logical Elements dialog is displayed which indicates the logical associations for the selected virtual disk 3 To close the View Associated Logical Elements dialog click C lose Viewing the Physical Associations You can use the Associated Physical Components option to view the physical components that are associated with source virtual disks snapshot virtual disks snapshot repository virtual disks disk groups unconfigured capacity and free capacity in a storage array To view the physical associations 1 Inthe AM W select anode in the Logical pane of the L ogical tab or in the Topology pane of the M appings tab 2 Select View Associated Physical C omponents Alternatively if the selected node is a virtual disk you can right click the node to open a pop up menu and select View Associated Physical Components If the selected node is a disk group unconfigured capacity or free capacity you can right click the node to open a pop up menu and select View gt Associated Physical Components T he View Associated Physical C omponents dialog is displayed with green triangle next to the physical components that are associated with the selected node 3 To close the View Associated Physical C
88. a0b80000fb6e50000000eC487b02 5 dm 10 DELL MD32xx size 1 6T features 3 queue_if_no_path pg_init_retries 50 hwhandler 1 rdac _ round robin 0 prio 6 active _ 1 0 0 2 sdf 8 80 active ready _ round robin 0 prio 1 enabled _ 0 0 0 2 sde 8 64 active ghost In this example the mpath device contains two paths dev sdf at Host 1 Channel 0 Target 0 LUN 2 dev sde at Host 0 Channel 0 Target 0 LUN 2 Flush the multi pathing device mapping using the following command multipath f dev mapper mapth_x where mapt h_x is the device you want to delete Delete the paths related with this device using the following command echo 1 gt sys block sd_x device delete where sd_x isthe SD node disk device returned by the multipath command Repeat this command for all paths related to this device For example echo 1 gt sys block sdf device delete echo 1 gt sys block sde device delet Remove mapping from c or delete the LUN if necessary If you want to map another LUN or increase volume capacity perform this action from M DSM K NOTE If you are only testing LUN removal you can stop at this step Configuration Disk Groups and Virtual Disks 125 7 If anew LUN is mapped or volume capacity is changed run the following command rescan_dm_devs 8 Usethemultipath 11 command to verify that e If anewLUN is mapped the new LUN is detected and giv
89. able sector is no longer accessible Management Firmware Downloads 199 200 Management Firmware Downloads Management Installing Array Components Recommended Tools You may need the following items to perform the procedures in this section Key to the system keylock e 2 Phillips screwdriver e Wrist grounding strap Management Installing Array Components 201 Front Bezel Optional Removing the Front Bezel 1 Using the system key unlock the front bezel if locked 2 Lift up the release latch next to the keylock 3 Rotate the left end of the bezel away from the front panel 4 Unhook the right end of the bezel and pull the bezel away from the system Figure 15 1 Removing and Installing the Front Bezel 1 bezel 2 keylock 3 release latch 4 hinge tab Installing the Front Bezel 1 Hook the right end of the bezel onto the chassis 2 Fit the free end of the bezel onto the system 3 Secure the bezel with the keylock See Figure 15 1 202 Management Installing Array Components Hard Drives SAFETY M odels AM T E03 and E04 Models AM T E03 and E04 are intended for installation only in restricted access locations as defined in cl 1 2 7 3 of IEC 60950 1 2005 Depending on your configuration your array either supports up to twenty four 2 5 SAS hard drives or up to twelve 3 5 SAS hard drives in internal drive bays Hard drives are connected to a backplane through hard drive carriers and can be
90. ad NVSRAM file with firmware in the Select files area Attributes of the firmware file is displayed in the Firmware file information area The attributes indicate the version of the firmware file Attributes of the NVSRAM file are displayed in the NVSRAM file information area The attributes indicate the version of the NVSRAM file If you want to download the file and activate the firmware and NVSRAM later select the Transfer files but don t activate them activate later check box K NOTE If any of the selected storage arrays do not support downloading the files and activating the firmware or NVSRAM later the Transfer files but don t activate them activate later check box is disabled Click OK The C onfirm D ownload dialog is displayed Click Yes The download starts and a progress indicator is displayed in the Status column of the U pgrade RAID C ontroller M odule Firmware window Downloading Only NVSRAM Firmware You also can use the command line interface CLI to download and activate NVSRAM to several storage arrays For more information see the PowerVault M odular Disk Storage M anager online help topics To download only NVSRAM firmware 1 To download the NVSRAM firmware from 192 e EMW Gotostep 7 e AMW Gotostep 2 M anagement Firmware Downloads Select Advanced gt M aintenance D ownload RAID C ontroller M odule NVSRAM or Select the Support tab and click D ownload Firmware n Sele
91. age Array Terms andConcepts 39 3 Provide host server access 4 Create mappings to associate the virtual disks with the host servers NOTE Host server access must be created before mapping virtual disks Disk groups are always created in the unconfigured capacity of a storage array Unconfigured capacity is the available physical disk space not already assigned in the storage array Virtual disks are created within the free capacity of a disk group F ree capacity is the space in a disk group that has not been assigned to a virtual disk Virtual Disk States The storage array recognizes the following virtual disk states Table 4 2 RAID Controller Virtual Disk States State Description Optimal The virtual disk contains physical disks that are all online D egraded The virtual disk with a redundant RAID level contains an inaccessible physical disk The system can still work properly but performance may be affected and additional disk failures may result in data loss Offline A virtual disk with one or more member disks is in an inaccessible failed missing or offline state D ata on the virtual disk is no longer accessible Force online The storage array forces a virtual disk that isin an Offline state to an Optimal state If all the member physical disks are not available the storage array forces the virtual disk to a D egraded state T he storage array can force a virtual disk to an Online state only when a sufficient
92. al disks of the same physical disk type and select Disk G roup C reate Alternatively you can right click the unassigned physical disks and select C reate Disk Group from the pop up menu e To create a secure disk group On the Physical tab select one or more unassigned security capable physical disks of the same physical disk type and select D isk G roup C reate Alternatively you can right click the unassigned security capable physical disks and select C reate Disk Group from the pop up menu The Introduction C reate Disk G roup window is displayed 2 Click Next The Disk Group Name and Physical D isk Selection window is displayed 96 Configuration Disk Groups and Virtual Disks 10 11 12 13 Type the name of the disk group up to 30 characters in Disk group name Select the appropriate Physical D isk selection choices you can select e Automatic see step 6 e Manual see step 9 Click Next For Automatic configuration The RAID Level and C apacity window is displayed Select the appropriate RAID level in Select RAID level You can select RAID levels 0 1 10 6 and 5 Depending on your RAID level selection the physical disks available for the selected RAID level is displayed in Select capacity table In the Select C apacity table select the relevant disk group capacity and click Finish For M anual configuration The M anual Physical D isk Selection window is displayed Select the appropriate RA
93. al D isk area lists the names and capacity of the virtual disks that are available for mapping based on the selected host group or selected host Click Add K NOTE The Add button is inactive until a host group or host LUN and virtual disk are selected To define additional mappings repeat step 4 through step 7 NOTE After a virtual disk is mapped itis no longer available in the Virtual Disk area Click C lose The mappings are saved The Topology pane and the D efined M appings pane in the M appings tab are updated to reflect the mappings Configuration Disk Groups and Virtual Disks Modifying and Removing Host to Virtual Disk Mapping You can modify or remove a host to virtual disk mapping for several reasons such as an incorrect mapping or reconfiguration of the storage array M odifying or removing a host to virtual disk mapping applies to both hosts and host groups To modify or remove host to virtual disk mapping K NOTE Before you modify or remove a host to virtual disk mapping you must stop 1 2 any data access I O to the virtual disks to prevent data loss In the AM W select the M appings tab In the Defined M appings pane perform one of these actions e Select a single virtual disk and select M appings C hange gt M apping e Right click the virtual disk and select C hange M apping from the pop up menu In Host group or host select the appropriate host group or host By default
94. al disk of the client system in the same area that is used for other recovery information This information is not overwritten for at least 72 hours A WARNING Use this option only under the guidance of your Technical Support representative To automatically collect the support bundle data 1 In the AM W select Advanced Troubleshooting Support D ata Automatic Settings Select Automatically collect support data for critical events To change the location of the saved support bundle click C hange TheC hange Folder L ocation window is displayed navigate to the relevant folder and click OK To reset the default location click Reset Click OK Troubleshooting Your Storage Array Software 233 Collecting the Physical Disk Data You can use the Collect Physical Disk D ata option to collect log sense data from all the physical disks on your storage array Log sense data consists of statistical information that is maintained by each of the physical disks in your storage array Your Technical Support representative can use this information to analyze the performance of your physical disks and for troubleshooting problems that may exist A WARNING Use this option only under the guidance of your Technical Support representative To collect physical disk data 1 IntheAM W select Advanced Troubleshooting C ollect Physical Disk D ata The Collect Physical D isk D ata window is displayed 2 Enter a name for the physi
95. al disk may be rejected by the storage array RAID controller modules and result in an error message M ake sure that the Read O nly attribute for the target virtual disk is disabled after the virtual disk copy is complete to prevent error messages from being displayed Online Copy An online copy creates a point in time snapshot copy of any virtual disk within a storage array while still allowing writes to the virtual disk when the copy is in progress This is achieved by creating a snapshot of the virtual disk and using that snapshot as the actual source virtual disk for the copy In an online virtual disk copy the relationship is between a snapshot virtual disk and a target virtual disk T he virtual disk for which the point in time image is created the source virtual disk must be a standard virtual disk in the storage array A snapshot virtual disk and a snapshot repository virtual disk are created during the online copy operation The snapshot virtual disk is not an actual virtual disk containing data instead it is a reference to the data contained on the virtual disk at a specific time For each snapshot taken a snapshot repository virtual disk is created to hold the copy on write data for the snapshot The snapshot repository virtual disk is used only to manage the snapshot image Before a data block on the source virtual disk is modified the contents of the block to be modified are copied to the snapshot repository virtual disk Bec
96. al disk named as Accounting R2 by default Whether you use the software supplied sequence number that by default populates the Snapshot virtual disk name or the Snapshot repository virtual disk name field the next default name for a snapshot or snapshot repository virtual disk still uses the sequence number determined by the software For example if you give the first snapshot of source virtual disk Accounting the name Accounting 8 and do not use the software supplied sequence number of 1 the default name for the next snapshot of Accounting is still Accounting 2 Configuration Premium Feature Snapshot Virtual Disks 151 e The next available sequence number is based on the number of existing snapshots of a source virtual disk If you delete a snapshot virtual disk its sequence number becomes available again e You must choose a unique name for the snapshot virtual disk and the snapshot repository virtual disks or an error message is displayed e Names are limited to 30 characters After you reach this limit in either the snapshot virtual disk name or the Snapshot repository virtual disk name fields you can no longer type in the field If the source virtual disk is 30 characters the default names for the snapshot and its associated snapshot repository virtual disk use the source virtual disk name truncated enough to add the sequence string For example for H ost Software Engineering Group GR 1 the default snapshot name is H ost
97. al disks Failure to meet the requirements of your host operating system results in an inaccurate snapshot of the source virtual disk or the target virtual disk in a virtual disk copy K NOTE Before you create a new snapshot of a source virtual disk stop any data access I O activity or suspend data transfer to the source virtual disk to ensure that you capture an accurate snapshot of the source virtual disk Close all applications including Windows Internet Explorer to make sure all I O activity has stopped K NOTE Removing the drive letter of the associated virtual disk s in Windows or unmounting the virtual drive in Linux helps to guarantee a stable copy of the drive for the Snapshot Before creating a snapshot virtual disk the host server must be in the proper state To prepare your host server 1 Stop all 1 0 activity to the source 148 Configuration Premium Feature Snapshot Virtual Disks 2 Using your Windows system flush the cache to the source At the host prompt type SMrepassist f lt filename identifier gt and press lt Enter gt For more information see SM repassist Utility on page 247 3 Remove the drive letter s of the source in Windows or unmount the virtual drive s in Linux to help guarantee a stable copy of the drive for the Snapshot If this is not done the snapshot operation reports that it has completed successfully but the snapshot data is not updated properly K NOTE Verify that the vi
98. an In Progress status a Pending status or a Failed status Stopping a virtual disk copy that has a Failed status clears the N eeds Attention status displayed for the storage array Keep these guidelines in mind when you stop a virtual disk copy e Touse this option select only one copy pair in the C opy M anager e When the virtual disk copy is stopped all of the mapped hosts have write access to the source virtual disk If data is written to the source virtual disk the data on the target virtual disk no longer matches the data on the source virtual disk Configuration Premium Feature Virtual DiskCopy 173 To stop a virtual disk copy complete the following steps 1 Inthe AMW select Virtual Disk C opy M anager The C opy M anager window is displayed 2 Select the copy pair in the table 3 Select C opy Stop 4 Click Yes Recopying a Virtual Disk You can recopy a virtual disk when you have stopped a virtual disk copy and you want to start it again or when a virtual disk copy has failed The Recopy option overwrites existing data on the target virtual disk and makes the target virtual disk read only to hosts This option fails all snapshot virtual disks associated with the target virtual disk if any exist Preparing Host Servers to Recopy a Virtual Disk K NOTE Before you create a new copy of a source virtual disk stop any data access I O activity or suspend data transfer to the source virtual disk and if appli
99. anage virtual disk sharing and accessibility M ore than one storage partition is required if Specific hosts must access specific virtual disks in the storage array e Hosts with different operating systems are attached to the same storage array In this case a storage partition is created for each host type You can use the Storage Partitioning W izard to define a single storage partition The Storage Partitioning wizard guides you through the major steps required to specify which host groups hosts virtual disks and associated logical unit numbers LUNs are to be included in the storage partition Storage partitioning fails when e All mappings are defined e You create a mapping for a host group that conflicts with an established mapping for a host in the host group e You create a mapping for a host in a host group that conflicts with an established mapping for the host group 130 Configuration Disk Groups and Virtual Disks Storage partitioning is unavailable when No valid host groups or hosts exist in the Topology pane on the M appings tab Nohost ports are defined for the host being included in the storage partition All mappings are defined K NOTE You can include a secondary virtual disk in a storage partition However any hosts that are mapped to the secondary virtual disk has read only access until the virtual disk is promoted to a primary virtual disk or the mirror relationship is removed Sto
100. any configuration changes occur while the window is open You must close the Performance M onitor window and reopen it for the changes to be displayed Using the Performance M onitor to retrieve performance data can affect the normal storage array performance depending on the polling interval that you set If the storage array you are monitoring begins in or transitions to an unresponsive state an informational dialog is displayed T he dialog informs you that the Performance M onitor cannot poll the storage array for performance data To monitor the performance of the arrays 1 Open MDSM and select the appropriate storage array 2 Open the Array M anagement Window AM W for the selected storage 3 array In the AM W select Storage Array M onitor Performance Planning MD3200 Series Storage Array Terms andConcepts 57 58 10 11 Click Settings a Select the items that you want to monitor You can monitor e RAID controller modules e Virtual disks e Storage array totals K NOTE By default all items are selected b In Polling interval select how often you want to update the performance statistics K NOTE For an accurate elapsed time do not use the Set RAID Controller Module Clocks option while using the Performance M onitor Each time the polling interval elapses the Performance M onitor queries the storage array again and updates the statistics in the table Click Start Values are displayed for the
101. arrays You can launch the Array M anagement W indow from the EM W e Array M anagement W indow AM W The AMW provides management functions for a single storage array You can launch more than one AM W at the same time to manage different storage arrays TheEMW andthe AMW consist of the following Thetitle bar at the top of the window shows the name of the application Beneath the title bar is the menu bar You can select menu options from the menu bar to perform tasks on a storage array Beneath the menu bar is the toolbar You can select options in the toolbar to perform tasks on a storage array e Beneath the toolbar are the tabs Tabs are used to group the tasks that you can perform on a storage array Beneath the tabs is the status bar T he status bar shows status messages and status icons related to the storage array K NOTE By default the toolbar and status bar is not displayed To view the toolbar or the status bar select View Toolbar or View Status Bar respectively Configuration Overview 61 Enterprise Management Window TheEMW provides high level management of storage arrays W hen you start MDSM the EMW isdisplayed The EMW has these tabs e Devicestab Provides information about the storage arrays e Setup tab Presents the initial setup tasks that guide you through adding storage arrays and configuring alerts The D evices tab has a Tree view on the left side of the window
102. as any other block devices in the host To list all the multipath devices run the following command Configuration Device Mapper Multipath for Linux 181 multipath 11 The output must be similar to this example which shows the output for one mapped virtual disk mpathl 3600a0b80005ab177000017544a8d6b92 dm 0 DELL MD32xx size 5 0G features 3 queue_if_no_path pg_init_retries 50 hwhandler 1 rdac rw _ round robin 0 prio 6 active _ 5 0 0 0 sdc 8 32 active ready _ round robin 0 prio 1 enabled _ 4 0 0 0 sdb 8 16 active ghost where mpath1 is the name of the virtual device created by device mapper It is located in the dev mapper directory DELL is the vendor of the device MD3200 is the model of the device Sdc is the physical path to the owning controller for the device Sdb is the physical path to the non owning controller for the device The following is an example of SLES output mpathb 360080e500017b2f80000c6ca4ald4ab8 dm 21 DELL MD32xx size 1 0G features 3 queue_if_no_path pg_init_retries 50 hwhandler 1 rdac rw _ round robin 0 prio 6 active _ 4 0 0 22 sdx 65 112 active ready _ round robin 0 prio 1 enabled _ 6 0 0 22 sdcl 69 144 active ghost where mpathb is the name of the virtual device created by device mapper It is located in the dev mapper directory 182 Configuration Device M apper M ultipath for Linux DELL is the vendor
103. asks are performed For example make sure that IP addresses are assigned to each RAID controller module If there is a cable or network accessibility problem see step 20 if not step 12 Troubleshooting Your Storage Array Software 12 13 14 15 16 17 18 19 20 21 For an in band managed storage array make sure that the host is network accessible by using the ping command to verify that the host can be reached Type one of these commands and press lt Enter gt e ping lt host name gt e ping lt RAID controller module P address gt If the verification successful see step 14 if not step 15 Remove the host with the U nresponsive status from the EM W and select Add Storage Array to add the host again If the host does not return to Optimal status go to step 16 Ensure that the host is turned on and operational and that the host adapters are installed Check all external cables and switches or hubs to make sure that no visible damage exists and that they are securely connected M ake sure the host context agent software is installed and running If you started the host system before you were connected to the RAID controller module in the storage array the host context agent software is not able to detect the RAID controller modules If this is the case make sure that the connections are secure and restart the host context agent software If you have recently replaced or added the RAID controll
104. assword dialog is displayed 4 Type the current password for the storage array 5 Click OK Configuring Alert Notifications MDSM can send an alert for any condition on the storage array that requires your attention Alerts can be sent as e mail messages or as Simple N etwork Management Protocol SNM P trap messages You can configure alert notifications either for all the storage arrays or a single storage array To configure alert notifications for all storage arrays 1 IntheEMW select the Setup tab 2 Select C onfigure Alerts The C onfigure Alerts dialog is displayed 3 Select All storage arrays 4 Click OK The C onfigure Alerts dialog is displayed To configure e mail alerts see Configuring E mail Alerts on page 77 To configure SNM P alerts see Configuring SNM P Alerts on page 79 To configure alert notifications for a single storage array 1 IntheEMW select the D evices tab 2 Select the relevant storage array then select E dit C onfigure Alerts The C onfigure Alerts dialog is displayed To configure e mail alerts see Configuring E mail Alerts on page 77 To configure SNM P alerts see Configuring SNMP Alerts on page 79 76 Configuration About Your Storage Array Configuring E mail Alerts For more information on configuring alert notifications see C onfiguring Alert Notifications on page 76 To configure e mail alerts 1 Open the C onfigure Alerts dialog by performing one of these actions e In
105. ast two physical disks must be installed in the array Device Health Conditions W hen you open the Enterprise M anagement W indow EM W the Dell PowerVault M odular Disk Storage M anagement software M DSM establishes communication with each managed storage array and determines the current storage array status T he current status is represented by icons next to the managed storage array The status icons shown in the Tree view in the EM W represent a summary status for each storage array If a storage array has a status of N eeds Attention or a status of Fixing you must determine the condition that is causing this status before attempting any management actions You can determine the condition causing the N eeds Attention status or the Fixing status by selecting the storage array and launching its Array M anagement W indow AM W Troubleshooting Your Storage Array Software 229 To launch the AM W perform one of these actions e On the Devicestab in either the Tree view or the Table view double click a storage array Alternatively you can right click a storage array and select M anage Storage Array from the pop up menu e On the Setup tab select M anage a Storage Array After the AM W is displayed select the Physical tab to see the components in the storage array A component that has a problem is indicated by a status icon The status icons indicate the status of the components that comprise the storage array Also the
106. at least 1 non alphanumeric character for example lt gt The pass phrase that you enter is masked 4 In Confim pass phrase re enter the exact string you entered in Pass phrase M ake a record of the pass phrase you entered You need it for later secure operations 5 Click Save 6 Makea record of the security key identifier and the file name from the Save Security Key C omplete dialog and click OK Validate Security Key A file in which a security key is stored is validated through the Validate Security Key dialog To transfer archive or back up the security key the RAID controller module firmware encrypts or wraps the security key and stores it in afile You must provide a pass phrase and identify the corresponding file to decrypt the file and recover the security key Data can be read from a security enabled physical disk only if a RAID controller module in the storage array provides the correct security key If security enabled physical disks are moved from one storage array to another 112 Configuration Disk Groups and Virtual Disks the appropriate security key must also be imported to the new storage array Otherwise the data on the security enabled physical disks that were moved is inaccessible For more information on validating the security key see the PowerVault M odular Disk Storage M anager online help topics Unlocking Secure Physical Disks You can export a security enabled disk group to move t
107. ation operation runs only on selected disk groups independent of other disk groups Cycle time is the time taken to complete verification of the metadata region of the disk group and all virtual disks in the disk group for which media verification is configured The next cycle for a disk group starts automatically when the current cycle completes You can set the cycle time for a media verification operation between 1 and 30 days The storage controller throttles the media verification I O accesses to disks based on the cycle time The storage array tracks the cycle for each disk group independent of other disk groups on the controller and creates a checkpoint If the media verification operation on a disk group is preempted or blocked by another operation on the disk group the storage array resumes after the current cycle If the media verification process on a disk group is stopped due to a RAID controller module restart the storage array resumes the process from the last checkpoint 44 Planning M D3200 Series Storage Array Terms and Concepts Virtual Disk Operations Limit The maximum number of active concurrent virtual disk processes per RAID controller module installed in the storage array is four This limit is applied to the following virtual disk processes Background initialization e Foreground initialization e Consistency check e Rebuild Copy back If a redundant RAID controller module fails with existing virtual disk
108. ault tolerance Disk performance requirements RAID 0 RAID 0 uses disk striping to provide high data throughput especially for large files in an environment that requires no data redundancy RAID 0 breaks the data down into segments and writes each segment to a separate physical disk 1 0 performance is greatly improved by spreading the I O load across many physical disks Although it offers the best performance of any RAID level RAID 0 lacks data redundancy Select this option only for non critical data because failure of one physical disk results in the loss of all data Examples of RAID 0 applications include video editing image editing prepress applications or any application requiring high bandwidth Planning MD3200 Series Storage Array Terms andConcepts 41 RAID 1 RAID 1 uses disk mirroring so that data written to one physical disk is simultaneously written to another physical disk This RAID level offers fast performance the best data availability and the highest disk overhead RAID 1 is recommended for small databases or other applications that do not require large capacity RAID 1 provides full data redundancy For example accounting payroll or financial applications RAID 5 RAID 5 uses parity and striping data across all physical disks distributed parity to provide high data throughput and data redundancy especially for small random access T his is a versatile RAID level and is suited for multi user environment
109. ause the snapshot repository virtual disk stores copies of the original data in those data blocks further changes to those data blocks write only to the source virtual disk K NOTE If the snapshot virtual disk that is used as the copy source is active the source virtual disk performance degrades due to copy on write operations When the copy is complete the snapshot is disabled and the source virtual disk performance is restored Although the snapshotis disabled the repository infrastructure and copy relationship remain intact Configuration Premium Feature Virtual DiskCopy 165 Creating a Virtual Disk Copy for an MSCS Shared Disk To create a virtual disk copy for a M icrosoft Cluster Server MSCS shared disk create a snapshot of the virtual disk and then use the snapshot virtual disk as the source for the virtual disk copy K NOTE An attempt to directly create a virtual disk copy for an M SCS shared disk rather than using a snapshot virtual disk fails with the following error The operation cannot complete because the selected virtual disk is nota source virtual disk candidate K NOTE When creating a snapshot virtual disk map the snapshot virtual disk to only one node in the cluster Mapping the snapshot virtual disk to the host group or both nodes in the cluster may cause data corruption by allowing both nodes to concurrently access data Virtual Disk Read Write Permissions After the virtual disk copy is comp
110. be matched is less than equal to or greater than the capacity entered in the GB box d Goto step 8 7 To search for all Free C apacity nodes with a particular capacity perform these steps K NOTE This option is not available when the Search by name option is selected or from the M appings tab You must cancel the selection of the Search by name option to use this option a Select Find all free capacity nodes b Typethe capacity in the GB box c Specify that the free capacity to be matched is less than equal to or greater than the capacity entered in the GB box d Goto step 8 8 Click Find Next To see every node that matches the criteria click Find N ext repeatedly If no matches are found the Search Failed dialog is displayed C lick O K and re enter the search criteria 9 To close the dialog click C ancel To continue searching for nodes with the same criteria after the Find dialog is closed press lt F 3 gt Using Go To Use the Go To option to quickly jump to an associated snapshot repository virtual disk snapshot virtual disk source virtual disk or target virtual disk These virtual disks are displayed in the Logical pane of the Logical tab The GoTo option is available only if the Snapshot premium feature or the Virtual Disk C opy premium feature is enabled or if snapshot virtual disks or virtual disk copies currently exist on the storage array The Go To option is not accessible from the M appings tab of
111. by selecting a known unassociated host port identifier n Known unassociated host port identifiers select the relevant host port identifier Add by creating a new host port identifier In New host port identifier enter a 16 hexadecimal character name and an up to 30 character Alias for the host port identifier and click Add K NOTE The host port identifier name is in hexadecimal and must contain the letters A through F and numbers 0 through 9 Click Next The Specify H ost Type window is displayed In Host type select the relevant operating system for the host The H ost Group Question window is displayed In this window you can select e Yes this host shares access to the same virtual disks with other hosts e No this host does NOT share access to the same virtual disks with other hosts Click Next If you select Yes the Specify H ost G roup window is displayed If you select No see step 11 Enter the name of the host group or select an existing host group and click Next Configuration About Your Host 87 The Preview window is displayed 11 Click Finish Removing Host Access To remove host access 1 Inthe AMW select the Mappings tab select the host node in the Topology pane 2 Perform one of these actions e Select Mappings Remove e Right click the host node and select Remove from the pop up menu The Remove confirmation dialog is displayed 3 Type yes 4 Click OK For more informat
112. cable the target disk to ensure that you capture an accurate point in time image of the source virtual disk Close all applications including Windows Internet Explorer to make sure all I O activity has stopped K NOTE Removing the drive letter of the associated virtual disk s in Windows or unmounting the virtual drive in Linux helps to guarantee a stable copy of the drive for the virtual disk copy Before creating a new virtual disk copy for an existing copy pair both the host server and the associated virtual disk you are recopying must be in the proper state Perform the following steps to prepare your host server and virtual disk 1 Stop all I O activity to the source and target virtual disk 2 Using your W indows system flush the cache to both the source and the target virtual disk if mounted At the host prompt type SMrepassist f lt filename identifier gt and press lt Enter gt For more information see SM repassist Utility on page 247 174 Configuration Premium Feature Virtual Disk Copy 3 To ensure that the virtual disk isin Optimal or Disabled status select the Summary tab then click Disk Groups amp Virtual D isks Remove the drive letter s of the source and if mounted virtual disk in Windows or unmount the virtual drive s in Linux to help guarantee a stable copy of the drive for the virtual disk If this is not done the copy operation reports that it has completed successfully but the co
113. cal disk data filename in Specify filename or click Browse to navigate to a previously saved file to overwrite an existing file The suffix bin is added to the file automatically if you do not specify a suffix for the file 3 Click Start The physical disk data collection is completed and saved at the location that you entered 4 ClickOK Event Log You can use the E vent L og Viewer to view a detailed list of events that occur in astorage array T he event logis stored on reserved areas on the storage array disks It records configuration events and storage array component failures A WARNING Use this option only under the guidance of your Technical Support representative The event log stores approximately 8000 events before it replaces an event with a new event If you want to keep the events you may save them and clear them from the event log 234 Troubleshooting Your Storage Array Software The event log shows two types of event views Summary view Shows an event summary in a table form Detail view Shows details about a selected event To view the event log 1 5 6 In the AM W select Advanced Troubleshooting View E vent L og The Event L og is displayed By default the summary view is displayed To view the details of each selected log entry select View details A detail pane is added to the event log that contains detailed information about the log item You can view the details about a s
114. cal pane is a contiguous region of unassigned capacity on a defined disk group W hen increasing virtual disk capacity some or all of the free capacity may be used to achieve the required final capacity D ata on the selected virtual disk remains accessible while the process for increasing virtual disk capacity isin progress 132 Configuration Disk Groups and Virtual Disks Using Unconfigured Capacity You can increase the capacity of a standard virtual disk or a snapshot repository virtual disk using the unconfigured capacity when no free capacity exists on a disk group An increase is achieved by adding unconfigured capacity in the form of unassigned physical disks to the disk group of the standard virtual disk or the snapshot repository virtual disk See Disk Group Expansion on page 131 For more information see the PowerVault M odular Disk Storage M anager online help topics Disk Group Migration Disk group migration allows to you export a disk group so that you can import the disk group to a different storage array You can also export a disk group so that you can store the data offline K NOTE During the export process before the disk group is imported you lose access to the data on the exported disk group K NOTE You must export a disk group before you move the disk group or import the disk group Export Disk Group The export disk group operation prepares the physical disks in the disk group for removal You ca
115. city than the text file virtual disk Configuration Disk Groups and Virtual Disks 95 A disk group must be organized according to its related tasks and subtasks For example if you create a disk group for the Accounting Department you can create virtual disks that match the different types of accounting transactions performed in the department Accounts Receivable AR Accounts Payable AP internal billing and so forth In this scenario the AR and AP virtual disks probably need more capacity than the internal billing virtual disk K NOTE In Linux the host must be rebooted after deleting virtual disks to reset the dev entries K NOTE Before you can use a virtual disk you must register the disk with the host systems See Host to Virtual Disk M apping on page 119 Creating Disk Groups You can create disk groups using either Automatic configuration or M anual configuration To create disk groups using automatic configuration 1 To start the Create Disk Group W izard perform one of these actions e To create a disk group from unconfigured capacity in the storage array On the Logical tab select an U nconfigured C apacity node and select D isk G roup C reate Alternatively you can right click the Unconfigured C apacity node and select C reate D isk Group from the pop up menu e To create a disk group from unassigned physical disks in the storage array On the Physical tab select one or more unassigned physic
116. ck 0 266 NON lt 4 es 4 8 8 fade a 267 Contents 17 18 Contents Introduction K NOTE Unless specified M D3200 Series represents Dell PowerVault M D3200 and Dell PowerVault M D3220 Storage Arrays A WARNING See the Safety Environmental and Regulatory Information document for important safety information before following any procedures listed in this document About This Document This guide familiarizes you with the functions of the D ell PowerVault M D 3200 Series storage array The guide is organized according to the tasks that you must complete after receiving your M D 3200 Series storage array The tasks are Planning Information about the storage array and its features Configuration Tasks that must be completed to ensure that your storage array performs optimally M anagement Tasks that may be performed to ensure that the storage array components are up to date and performing properly including removal and installation of storage array components Troubleshooting Tasks that you must complete to resolve problems that may occur with the storage array Additional information on these and other topics can be found in the D ell PowerVault M D 3200 and M D 3220 Storage Array Deployment G uide at dell com support manuals Introduction 19 Inside the Box of the Dell Pow erVault M D3200 Series Storage Array Your M D 3200 Series product package includes Dell PowerVault M D 32
117. ckplane 3 captive screw Figure 15 17 Removing and Installing the Backplane Pow erVault M D3220 1 screws 4 2 backplane 3 captive screw Management Installing Array Components 223 Installing the Backplane 1 2 10 11 224 Align the holes on the backplane with the holes on the array Tighten the captive screw to secure the backplane to the chassis See Figure 15 16 for PowerVault M D 3200 or Figure 15 17 for PowerVault M D 3220 Replace the screws that secure the backplane to the chassis See Figure 15 16 for PowerVault M D 3200 or Figure 15 17 for PowerVault M D 3220 Align the slots on the RAID controller module power supply cage with the tabs on the chassis See Figure 15 15 Push the RAID controller module power supply cage toward the front of the array Replace the screws that secure the RAID controller module power supply cage to the chassis Replace the control panel See Installing the C ontrol Panel on page 220 Replace the power supply cooling fan modules See Installing a Power Supply C ooling Fan M odule on page 217 Replace the hard drives See Installing a Hard Drive on page 206 Connect all the cables to the array Turn on the array and the host server Management Installing Array Components M anagement Firmw are Inventory A storage array is made up of many components which may include RAID controller modules physical disks and enclosure management modules EM Ms Each of t
118. closure Capturing the State Information SM repassist Utility aaa Unidentified Devices naaa aaa Recovering From an Unidentified Storage Array Starting or Restarting the Host Context Agent Software aaa a Contents 248 15 19 Troubleshooting YourArray 253 Safety First For you and YourArray 253 Troubleshooting Storage Array Startup Failure 253 Troubleshooting Loss of Communication 253 Troubleshooting External Connections 253 Troubleshooting Pow er Supply Cooling Fan Modules o Tari tuae ai adu doii ee AR 254 Troubleshooting Array Cooling Problems 255 Troubleshooting Expansion Enclosure ManagementModules 0 255 Troubleshooting RAID ControllerModules 256 Troubleshooting Hard Drives 258 Troubleshooting Array and Expansion Enclosure Connections 0 259 Troubleshooting a WetStorageArray 260 Troubleshooting a Damaged Array 261 Troubleshooting RAID ControllerModules 261 Conditions 3 05 2 G5 teal ays ee age OS 261 Invalid Storage Array 2 2 2 ee 262 EGC EFrOTS a cerida vot a Sot hae et 262 PCIEMOMS s sgua ae eA ae eek ees 262 CriticalConditions 00 262 Noncritical Conditions 0 263 Contents 20 Getting Help 0 265 Locating Your System Service Tag 265 Contacting Dell aaa 265 Documentation Feedba
119. compatible before attempting another firmware download Self M onitoring Analysis and Reporting Technology SM ART Self M onitoring Analysis and Reporting Technology SMART monitors the internal performance of all physical disk components to detect faults indicating the potential for physical disk failure SMART uses this information to report whether failure is imminent so that a physical disk can be replaced before failure occurs The RAID controller monitors all attached drives and notifies users when a predicted failure is reported by a physical disk M edia Errors and Unreadable Sectors If the RAID controller detects a media error while accessing data from a physical disk that isa member of a disk group with a redundant RAID level RAID 1 RAID 5 or RAID 10 the controller tries to recover the data from peer disks in the disk group and uses recovered data to correct the error If the 198 Management Firmware Downloads controller encounters an error while accessing a peer disk it is unable to recover the data and affected sectors are added to the unreadable sector log maintained by the controller Other conditions under which sectors are added to the unreadable sector log include e A media error is encountered when trying to access a physical disk that isa member of a non redundant disk group RAID 0 or degraded RAID 1 RAID 5orRAID 10 e An error is encountered on source disks during rebuild K NOTE Data on an unread
120. configured as hot swappable Removing a Hard Drive Blank A CAUTION To maintain proper system cooling all empty hard drive bays must have drive blanks installed 1 If installed remove the front bezel See Removing the Front Bezel on page 202 2 Press the release tab and slide the hard drive blank out until it is free of the drive bay See Figure 15 2 for PowerVault M D 3200 and Figure 15 3 for PowerVault M D 3220 Figure 15 2 Removing and Installing a 3 5 Hard Drive Blank M D3200 Only 1 hard drive blank 2 release tab Management Installing ArrayComponents 203 Figure 15 3 Removing and Installing a 2 5 Hard Drive Blank M D3220 Only 1 hard drive blank 2 release tab Installing a Hard Drive Blank 1 If installed remove the front bezel See Removing the Front Bezel on page 202 2 Insert the hard drive blank into the drive bay until the blank is fully seated 3 Close the handle to lock the blank in place 4 If applicable replace the front bezel See Installing the Front Bezel on page 202 Removing a Hard Drive A CAUTION M any repairs may only be done by a certified service technician You must only perform troubleshooting and simple repairs as authorized in your product documentation or as directed by the online or telephone service and support team Damage due to servicing that is not authorized by Dell is not covered by your warranty Read and follow the safety instructions that came with the pr
121. ct download task select Download RAID controller module NVSRAM and click OK An error message is displayed C lick OK to close it and select a compatible file To locate the directory in which the file to download resides click Select File Select the file to download in the File selection area and click OK By default only downloadable files that are compatible with the current storage array configuration are displayed W hen you select a file in the File selection area applicable attributes if any of the file are displayed in the NVSRAM File information area The attributes indicate the version of the NVSRAM file Click Transfer K NOTE If the file selected is not valid or is not compatible with the current storage array configuration the File Selection Error dialog is displayed Click OK to close it and choose a compatible NVSRAM file Click Yesin the C onfirm D ownload dialog The download starts Perform one of these actions Select Tools U pgrade RAID C ontroller M odule Firmware e Select the Setup tab and click U pgrade RAID Controller M odule Firmware The Upgrade RAID C ontroller M odule Firmware window is displayed The Storage array pane lists the storage arrays T he D etails pane shows the details of the storage array that is selected in the Storage array pane Management Firmware Downloads 193 8 In the Storage array pane select the storage array for which you want to download the NVSRA
122. d and the storage partitions are disabled you can map only a total of 32 LUNs Any additional virtual disks that are created are put in the Unidentified 126 Configuration Disk Groups and Virtual Disks M appings area If additional mappings are defined for one of these Unidentified M appings the D efine Additional M apping dialog shows the LUN list and the Add button is unavailable e Donot configure dual mappings on a W indows host e If thereisa host with a restricted host type that is part of a specific storage partition all of the hosts in that storage partition are limited to the maximum number of LUNs allowed by the restricted host type e You cannot move a host with a restricted host type into a storage partition that already has LUNs mapped that are greater than what is allowed by the restricted host type For example if you have a restricted host type that allows only LUNs up to 31 you cannot move that restricted host type into a storage partition that has LUNs greater than 31 already mapped The Default Group on the M appings tab has a default host type You can change this type by selecting Storage Array C hange gt D efault H ost Type If you set the default host type to a host type that is restricted the maximum number of LUNs that are allowed in the Default Group for any host are restricted to the limit imposed by the restricted host type If a particular host with anon restricted host type becomes part of a specific
123. data and increased unused free space are dynamically redistributed across the disk group RAID characteristics are also reapplied to the disk group as a whole 46 Planning M D3200 Series Storage Array Terms and Concepts Disk Group Defragmentation Defragmenting consolidates the free capacity in the disk group into one contiguous area D efragmentation does not change the way in which the data is stored on the virtual disks Disk Group Operations Limit The maximum number of active concurrent disk group processes per installed RAID controller module is one This limit is applied to the following disk group processes e Virtual disk RAID level migration Segment size migration e Virtual disk capacity expansion e Disk group expansion e Disk group defragmentation If a redundant RAID controller module fails with an existing disk group process the process on the failed controller is transferred to the peer controller A transferred process is placed in a suspended state if there is an active disk group process on the peer controller The suspended processes are resumed when the active process on the peer controller completes or is stopped NOTE If you try to start a disk group process on a controller that does not have an existing active process the start attempt fails if the first virtual disk in the disk group is owned by the other controller and there is an active process on the other controller RAID Background Operations
124. e 4 1 describes the various states of the physical disk which are recognized by the storage array and reported in the M DSM application Table 4 1 RAID Controller Physical Disk States Status Mode Description Physical Disk Status LED Optimal Assigned The physical disk in the indicated slot Steady Green is configured as part of a disk group Optimal Unassigned The physical disk in the indicated slot Steady Green is unused and available to be configured Optimal Hot Spare The physical disk in the indicated slot Steady Green standby is configured as a hot spare Optimal HotSparein The physical disk in the indicated slot Steady Green use isin use as ahot spare within a disk group Failed Assigned The physical disk in the indicated slot Amber flashing Unassigned has failed because of an unrecoverable 150 ms Hot Sparein error an incorrect drive type or drive use or Hot size or by its operational state being Spare standby set to failed Replaced Assigned The physical disk in the indicated slot Green flashing is replaced and is ready to be or is On 400 ms Off actively being configured into a disk 100 ms group 38 Planning M D3200 Series Storage Array Terms and Concepts Table 4 1 RAID Controller Physical Disk States continued Status Mode Description Physical Disk Status LED Pending Assigned A Self M onitoring Analysis and Green flashing Failure Unassigned Reporting Technology SMART error 500 ms
125. e RAID enclosure supports several advanced features 50 Virtual Disk Snapshots Virtual Disk Copy High Performance T ier NOTE Virtual Disk Snapshot Virtual Disk Copy and High Performance Tier are premium features that must be activated separately If you have purchased these features an activation card is supplied that contains instructions for enabling this functionality Planning M D3200 Series Storage Array Terms and Concepts Host Server to Virtual Disk M apping The host server attached to a storage array accesses various virtual disks on the storage array through its host ports Specific virtual disk to LUN mappings to an individual host server can be defined In addition the host server can be part of a host group that shares access to one or more virtual disks You can manually configure a host server to virtual disk mapping W hen you configure host server to virtual disk mapping consider these guidelines e You can define one host server to virtual disk mapping for each virtual disk in the storage array e Host server to virtual disk mappings are shared between RAID controller modules in the storage array e AuniqueLUN must be used by a host group or host server to access a virtual disk e Not every operating system has the same number of LUNs available for use Host Types A host server is a server that accesses a storage array H ost servers are mapped to the virtual disks H ost servers have the following a
126. e RAID levels of every virtual disk that comprises the disk group Performance may be slightly affected during the operation Guidelines to change the RAID level of a disk group e You cannot cancel this operation after it begins e Thedisk group must be in Optimal status before you can perform this operation e Your data remains available during this operation e If you do not have enough capacity in the disk group to convert to the new RAID level an error message is displayed and the operation does not continue If you have unassigned physical disks use the Disk Group gt gt Add Free Capacity Physical Disks option to add additional capacity to the disk group Then retry the operation To change the RAID level of a disk group 1 Inthe AMW select the Logical tab and select a disk group 2 Select Disk G roup C hange gt RAID Level 3 Select the appropriate RAID level and click Yes to confirm the selection The RAID level operation begins Removing a Host to Virtual Disk M apping Using Linux DMMP To remove a host to virtual disk mapping using Linux DMMP follow these steps 1 Unmount the filesystem containing the virtual disk umount filesystemDirectory 2 Run the following command to display multi pathing topology multipath 11 124 Configuration Disk Groups and Virtual Disks Note the virtual disk that you want to delete from the mapping For example the following information may be displayed mpath6 3600
127. e a RAID level 1 disk group requires a minimum of two physical disks enclosure loss protections cannot be achieved if your storage array has less than two expansion enclosures RAID level 0 Because RAID level 0 does not have consistency you cannot achieve enclosure loss protection 118 Configuration Disk Groups and Virtual Disks Host to Virtual Disk Mapping After you create virtual disks you must map them to the host s connected to the array Guidelines to configure host to virtual disk mapping Each virtual disk in the storage array can be mapped to only one host or host group Host to virtual disk mappings are shared between controllers in the storage array A uniqueLUN must be used by a host group or host to access a virtual disk Each host has its own LUN address space M DSM permits the same LUN to be used by different hosts or host groups to access virtual disks in a storage array Not every operating system has the same number of LUNs available You can define the mappings on the M appings tab in the AM W See Using the M appings Tab on page 86 Creating Host to Virtual Disk Mappings Guidelines to define the mappings An access virtual disk mapping is not required for an out of band storage array If your storage array is managed using an out of band connection and an access virtual disk mapping is assigned to the Default Group an access virtual disk mapping is assigned to every host created from the Defa
128. e access virtual disk is not available for application data storage The default LUN is 31 Storage Arrays You must add the storage arrays to MDSM before you can setup the storage array for optimal use Adding Storage Arrays You can add storage arrays only in the EM W You can e Automatically discover storage arrays e Manually add storage arrays NOTE Verify that your host or management station network configuration including station IP address subnet mask and default gatew ay is correct before adding a new storage array using the Automatic option 66 Configuration About Your Storage Array K NOTE For Linux set the default gateway so that broadcast packets are sent to 255 255 255 0 For Red Hat Enterprise Linux if no gateway exists on the network set the default gateway to the IP address of the NIC K NOTE M DSM uses TCP UDP port 2463 for communication to the M D Storage Array Automatic Discovery of Storage Arrays The Automatic Discovery process sends out a broadcast message across the local subnetwork subnet and adds any storage array that responds to the message T he Automatic Discovery process finds both in band and out of band storage arrays K NOTE The Automatic Discovery option and the Re scan Hosts option in the Enterprise Management W indow provide automatic methods to discover managed storage arrays M anual Addition of a Storage Array Use M anual Addition if the storage array resides
129. e enough capacity in the disk group to convert to the new RAID level an error message is displayed and the operation does not continue If you have unassigned physical disks use the Disk Group gt gt Add Free C apacity Physical Disks option to add additional capacity to the disk group Then retry the operation To change the RAID level of a disk group 1 Select the Logical tab 2 Select the disk group Configuration Disk Groups and Virtual Disks 129 3 Select Disk G roup C hange gt RAID Level 4 Select the RAID level RAID level 0 RAID level 1 RAID level 5 or RAID level 6 The currently selected option is designated with a dot 5 Click Yes The RAID level operation begins Storage Partitioning A storage partition is a logical entity consisting of one or more virtual disks that can be accessed by a single host or shared among hosts that are part of a host group The first time you map a virtual disk to a specific host or host group a storage partition is created Subsequent virtual disk mappings to that host or host group do not create another storage partition One storage partition is sufficient if e Only one attached host accesses all of the virtual disks in the storage array All attached hosts share access to all of the virtual disks in the storage array W hen you choose this type of configuration all of the hosts must have the same operating system and special software such as clustering software to m
130. e loss of data access A virtual disk copy overwrites data on the target virtual disk A virtual disk copy automatically makes the target virtual disk read only to hosts You may want to keep this attribute enabled to preserve the data on the target virtual disk A CAUTION If you decide not to preserve the data on the target virtual disk after the virtual disk copy has completed disable the Read Only attribute for the target virtual disk For more information on enabling and disabling the Read Only attribute for the target virtual disk see Virtual Disk Read Write Permissions on page 166 To prevent write protected error messages from being displayed do not try to access a source virtual disk that is participating in a virtual disk copy while the virtual disk copy has a status of In Progress Also make sure that the Read Only attribute for the target virtual disk is disabled after the virtual disk copy has completed to prevent error messages from being displayed To copy the virtual disk 1 Stop all I O activity to the source virtual disk and the target virtual disk 2 Unmount any file systems on the source virtual disk and the target virtual disk 3 IntheAMW select the Logical tab and select the source virtual disk 4 Select Virtual D isk C reate C opy The Select Source Virtual D isk and C opy Type window is displayed 5 In the Select source virtual disk area select the appropriate virtual disk 6 In the Select C opy Type
131. e sure that enclosure loss protection is not affected you must replace a failed physical disk to initiate the copyback process The virtual disk remains online and accessible while you are replacing the failed physical disk because the hot spare physical disk is automatically substituted for the failed physical disk Enclosure Loss Protection Enclosure loss protection is an attribute of a disk group Enclosure loss protection guarantees accessibility to the data on the virtual disks in a disk group if a total loss of communication occurs with a single expansion enclosure An example of total loss of communication may be loss of power to the expansion enclosure or failure of both RAID controller modules VAN CAUTION Enclosure loss protection is not guaranteed if a physical disk has already failed in the disk group In this situation losing access to an expansion enclosure and consequently another physical disk in the disk group causes a double physical disk failure and loss of data Enclosure loss protection is achieved when you create a disk group where all of the physical disks that comprise the disk group are located in different expansion enclosures This distinction depends on the RAID level If you choose to create a disk group by using the Automatic method the software Configuration Disk Groups and Virtual Disks 117 attempts to choose physical disks that provide enclosure loss protection If you choose to create a disk group b
132. ect the L ogical tab Configuration Premium Feature Snapshot Virtual Disks 159 2 Choose one e Select the snapshot virtual disk and select Virtual D isk Snapshot Rollback e Right click the snapshot virtual disk and select Rollback The Confirm Rollback Snapshot Virtual D isk dialog is displayed In the Select rollback priority area use the slider bar to set rollback priority NOTE If priority is set at the lowest rate normal data write activity is highest priority and the rollback operation takes longer to complete If the priority is at the highest rate the rollback operation is highest priority and data write activity is reduced To start the snapshot rollback type yes in the confirmation box and click OK Rollback status is shown in the Properties pane for the base virtual disk and snapshot virtual disk Resuming a Snapshot Rollback If an error occurs during the snapshot rollback and the operation is paused you can resume the rollback using the following steps 1 2 3 In the array management window select the L ogical tab Choose one e Select the snapshot virtual disk and select Virtual D isk Snapshot Resume Rollback e Right click the snapshot virtual disk and select Resume Rollback The Resume Rollback dialog is displayed Click OK If the snapshot rollback resumed successfully status is displayed in Properties pane of the base virtual disk or snapshot virtual disk If the snapshot
133. edure T hese components are removed during the procedure Persistent reservations Mappings Virtual disk copy pairs Snapshot virtual disks and snapshot repository virtual disks Configuration Disk Groups and Virtual Disks 135 Storage Array Media Scan The media scan is a background operation that examines virtual disks to verify that data is accessible The process finds media errors before normal read and write activity is disrupted and reports errors to the event log K NOTE You cannot enable background media scans on a virtual disk comprised of Solid State Disks SSDs Errors discovered by the media scan include e Unrecovered media error D ata could not be read on the first attempt or on any subsequent attempts For virtual disks with redundancy protection data is reconstructed rewritten to the physical disk and verified and the error is reported to the event log For virtual disks without redundancy protection RAID level 1 RAID level 5 and RAID level 6 virtual disks the error is not corrected but is reported to the event log e Recovered media error D ata could not be read by the physical disk on the first attempt but was successfully read on a subsequent attempt Data is rewritten to the physical disk and verified and the error is reported to the event log e Redundancy mismatches error T he first 10 redundancy mismatches that are found on the virtual disk are reported to the event log e Unfixable e
134. eferred RAID controller module owner of a virtual disk after it is created If a host is only connected to only one RAID controller module the preferred owner must manually be assigned to the RAID controller module the host can access Ownership of a virtual disk is moved from the preferred controller to the secondary controller also called the alternate controller when the preferred controller is e Physically removed e Updating firmware e Involved in an event that caused failover to the alternate controller Paths used by the preferred RAID controller module to access either the disks or the host server are called the preferred paths redundant paths are called the alternate paths If a failure causes the preferred path to become inaccessible the storage array automatically uses the alternate path to access data when this occurs the enclosure status LED blinks amber Virtual Disk Ownership MDSM can beused to automatically build and view virtual disks It uses optimal settings to stripe the disk group Virtual disks are assigned to alternating RAID controller modules when they are created This default assignation provides a simple means for load balancing the workload of the RAID controller modules Planning MD3200 Series Storage Array Terms andConcepts 55 Ownership can later be modified to balance workload according to actual usage If virtual disk ownership is not manually balanced it is possible for one controller to ha
135. en a multi pathing device node e If you increased volume capacity the new capacity is displayed Restricted Mappings M any hosts are able to map up to 256 logical unit numbers LU Ns 0 to 255 per storage partition H owever the maximum number of mappings differs because of operating system variables failover driver issues and potential data problems The hosts listed in the table have these mapping restrictions If you try to map a virtual disk to aLUN that exceeds the restriction on these operating systems the host is unable to access the virtual disk Operating System Highest LUN W indows Server 2003 and W indows server 2008 255 Linux 255 Guidelines when you work with host types with LUN mapping restrictions e You cannot change a host adapter port to a restricted host type if there are already mappings in the storage partition that would exceed the limit imposed by the restricted host type e Consider the case of the D efault Group that has access to LU Ns up to 256 0 to 255 and a restricted host type is added to the Default Group In this case the host that is associated with the restricted host type is able to access virtual disks in the Default Group with LUNs within its limits For example if the Default Group had two virtual disks mapped to LUNs 254 and 255 the host with the restricted host type would not be able to access those two virtual disks Ifthe Default Group has a restricted host type assigne
136. er M odule Firmware Select the Setup tab and click Upgrade RAID C ontroller M odule Firmware In the Storage array pane select the storage array for which you want to upgrade the RAID controller module firmware or the NVSRAM You can select more than one storage array K NOTE The Details pane shows the details of only one storage array ata time If you select more than one storage array in the Storage Array pane the details of the storage arrays are not shown in the Details pane Click Firmware in the D ownload area If you select a storage array that cannot be upgraded the Firmware button is disabled The D ownload Firmware dialog is displayed T he current firmware version and the NVSRAM version of the selected storage arrays is displayed K NOTE If you select the storage arrays with different RAID controller module types that cannot be updated with the same firmware or NVSRAM file and click Firmware the Incompatible RAID Controller M odules dialog is displayed Click OK to close the dialog and select the storage arrays with similar RAID controller module types Management Firmware Downloads 191 12 13 14 15 16 17 18 To locate the directory in which the file to download resides click Browse in the Select files area The Select File dialog is displayed Select the file to download Click OK If you want to download the NVSRAM file with the RAID controller module firmware select Downlo
137. er module restart the host context agent software so that the new RAID controller module is recognized If the problem still exists make the appropriate host modifications check with other administrators to see if a firmware upgrade was performed on the RAID controller module from another storage management station If a firmware upgrade was performed the EM W on your management station may not be able to locate the new AM W software needed to manage the storage array with the new version of the firmware If the problem persists contact your Technical Support representative Troubleshooting Your Storage Array Software 243 22 23 Determine if there is an excessive amount of network traffic to one or more RAID controller modules This problem is self correcting because the EM W software periodically retries to establish communication with the RAID controller modules in the storage array If the storage array was unresponsive and a subsequent try to connect to the storage array succeeds the storage array becomes responsive For an out of band managed storage array determine if management operations are taking place on the storage array from other storage management stations A RAID controller module determined limit exists to the number of Transmission Control Protocol Internet Protocol TCP IP connections that can be made to the RAID controller module before it stops responding to subsequent connection attempts T he type of
138. erVault M odular Disk StorageManager 20 Other InformationyouMayNeed 20 2 Planning About Your Storage Array 23 OVENI EW Sane te Ad eA BAER eA P E 23 Hardware Features 004 24 Front Panel Features and Indicators 24 Back Panel Features and Indicators 27 Hard Drive Indicator Patterns aaa aaa 28 Pow er Supply and Cooling FanFeatures 29 Pow er Indicator Codes andFeatures 30 3 Planning RAID Controller Modules 31 RAID Controller Modules naaa 31 Contents RAID Controller M odule Connectors and Features o 2 446 ars bho Sea bea ates 32 RAID Controller Module Additional Features 34 Battery Backup Unit 34 Storage Array ThermalShutdown 35 System PasswordReset 35 Cache Functions andFeatures 36 Cache Mirroring 2 0 ee 36 Write Back Cache 004 36 Write ThroughCache 36 4 Planning MD3200 Series Storage Array Terms and Concepts 37 Physical Disks Virtual Disks and Disk Groups 37 PhysicalDisks 2 2 2 ee a a a a 38 Physical Disk States 0 38 Self M onitoring Analysis and Reporting Technology 39 Virtual Disks and Disk Groups 39 Virtual Disk States 2 2 2 0 0 2 00 40 RAID Levels aoaaa 40 RAIDLevelUsage 0004 41 SeGMENESIZe os oe OE dae REGS oi 43 Virtual D
139. erated the alert For the selected e mail address in Frequency select e Every event Sends an alert e mail whenever an event occurs This is the default option e Every x hours Sends an alert e mail after the specified time interval if an event occurred during that time interval You can select this option only if you have selected either Event Profile or E vent Support in the Information To Send drop down list Click OK Configuration About Your Storage Array An alert icon is displayed next to each node in the Tree view where an alert is set To ensure that the e mail is sent successfully You must provide a SMTP mail server name and an e mail sender address for the email addresses to work The email addresses that you had previously configured are displayed in the Configured e mail addresses area You must use fully qualified e mail addresses for example name mycompany com You can configure multiple e mail addresses before you click OK Configuring SNMP Alerts To add amanagement console to the list of addresses configured to receive SNMP alerts 1 Open the C onfigure Alerts dialog by performing one of these actions In the Tree view or the Table view on the D evices tab in the EMW select anode and select E dit C onfigure Alerts Go to step 3 e In the Setup tab in the EM W select C onfigure Alerts Go to step 2 Select one of the following radio buttons to specify an alert level e
140. erations Click C reate Key M ake a record of the security key identifier and the file name from the C reate Security Key C omplete dialog and click OK Configuration Disk Groups and Virtual Disks 109 After you have created a security key you can create secure disk groups from security capable physical disks Creating a secure disk group makes the physical disks in the disk group security enabled Security enabled physical disks enter Security L ocked status whenever power is re applied They can be unlocked only by a RAID controller module that supplies the correct key during physical disk initialization Otherwise the physical disks remain locked and the data is inaccessible T he Security L ocked status prevents any unauthorized person from accessing data on a security enabled physical disk by physically removing the physical disk and installing the physical disk in another computer or storage array Changing a Security Key W hen you change a security key a new security key is generated by the system T he new key replaces the previous key You cannot view or read the key H owever a copy of the security key must be kept on some other storage medium for backup in case of system failure or for transfer to another storage array A pass phrase that you provide encrypts and decrypts the security key for storage on other media W hen you change a security key you also provide information to create a security key identifier Chan
141. es enclosure loss protection is displayed and is selected by default 4 in the Available physical disks area select physical disks up to the allowed maximum number of physical disks K NOTE You cannot mix different media types or different interface types within a single disk group or virtual disk 5 Click Add A message prompts you to confirm your selection 6 To add the capacity to the disk group click Yes You can also use the Command Line Interface CLI on both W indows and Linux hosts to add free capacity to a disk group After the capacity expansion is completed additional free capacity is available in the disk group for creation of new virtual disks or expansion of existing virtual disks Virtual Disk Expansion Virtual disk expansion is a dynamic modification operation that increases the capacity of standard virtual disks K NOTE Snapshot repository virtual disks can be expanded from the CLI or from M DSM AIl other virtual disk types are expandable only from the CLI If you receive a warning that the snapshot repository virtual disk is becoming full you may expand the snapshot repository virtual disk from M DSM See Snapshot Repository C apacity on page 152 for step by step instructions Using Free Capacity You can increase the capacity of a virtual disk using the free capacity on the disk group of the standard virtual disk or the snapshot repository virtual disk The Free C apacity node shown in the Logi
142. eshold Temperature Exceeding Event Description Nominal failure threshold A critical event is set M aximum failure threshold Shutdown of the system power supplies occurs within 3 minutes Shutdown threshold Shutdown of the system power supplies occurs within 5 seconds System Passw ord Reset The storage array password can be reset if it is forgotten To reset the password push and hold down the password reset switch for at least 5 seconds T he password is deleted See Figure 3 1 to locate the password reset switch The RAID controller module allows you to change the password For more information about setting your password see Setting a Password on page 71 K NOTE The reset switch can be accessed by using a small object such as the tip of a pen Planning RAID Controller Modules 35 Cache Functions and Features Cache Mirroring Cache mirroring function copies accepted host write data from the primary controller to the partner controller This action ensures that host write data is safely mirrored to the partner controller before successful completion status is returned to the host If a controller fails the surviving controller safely retains all mirrored data C ache mirroring is enabled by default Write Back Cache In Write back C ache write operations result in a completion signal being sent to the host operating system as soon as the cache receives the data to be written The target physical disk receives t
143. etter as in the following example SM repassist f E K NOTE In Windows the mount point path is a drive letter An error message is displayed in the command line when the utility cannot distinguish between the following e Source virtual disk and snapshot virtual disk for example if the snapshot virtual disk is removed e Standard virtual disk and virtual disk copy for example if the virtual disk copy is removed Troubleshooting Your Storage Array Software 247 Unidentified Devices An unidentified node or device occurs when MDSM cannot access a new storage array C auses for this error include network connection problems the storage array is turned off or the storage array does not exist K NOTE Before beginning any recovery procedure make sure thatthe host context agent software is installed and running If you started the host before the host was connected to the storage array the host context agent software is not able to find the storage array If so make sure that the connections are tight and restart the host context agent software If a storage array is managed by using both out of band management and in band management using the same host a management network connection problem may prevent direct communication with the storage array H owever you may still be able to manage the storage array over the in band connections The opposite situation can also occur If a storage array is managed through m
144. f the charge of the battery module A learn cycle can only start when the battery is fully charged The learn cycle completes the following operations e Discharges the battery to a predetermined threshold e Charges the battery back to full capacity A learn cycle starts automatically when you install a new battery module Learn cycles for batteries in both RAID controller modulesin a duplex system occur simultaneously Learn cycles are scheduled to start automatically at regular intervals at the same time and on the same day of the week T he interval between cycles is described in weeks Use the following guidelines to adjust the interval e You can use the default interval e You can run a learn cycle at any time e You can set the learn cycle earlier than the currently scheduled time e You cannot set the learn cycle to start more than seven days later than the currently scheduled time To change the battery settings perform these steps 1 Inthe AMW select Storage Array C hange gt Battery Settings The Battery Settings dialog is displayed 2 In Battery location select a battery 3 Check these details about the battery e Battery status e Battery age e Days until replacement For more information see the PowerVault M odular Disk Storage M anager online help topics Configuration About Your Storage Array 81 Setting the Storage Array RAID Controller Module Clocks You can use the Synchronize RAID C ontroller M odule C
145. fan has failed One RAID controller module in a redundant configuration has failed A battery has failed or is removed A physical disk in a redundant virtual disk has failed W hen the enclosure is under noncritical condition its enclosure status LED blinks amber Troubleshooting YourArray 263 264 Troubleshooting Your Array Getting Help Locating Your System Service Tag Your system is identified by a unique Express Service C ode and Service Tag number T he Express Service C ode and Service Tag are found on the front of the system by pulling out the information tag This information is used by Dell to route support calls to the appropriate personnel Contacting Dell K NOTE Dell provides several online and telephone based support and service options If you do not have an active Internet connection you can find contact information on your purchase invoice packing slip bill or Dell product catalog Availability varies by country and product and some services may not be available in your area To contact Dell for sales technical support or customer service issues 1 Go to dell com contactdell 2 Select your country or region from the interactive world map W hen you select a region the countries for the selected regions are displayed 3 Select the appropriate language under the country of your choice 4 4 Select your business segment The main support page for the selected business segment is displayed 5 Select
146. for a virtual disk copy This configuration is one of the best ways you can apply the snapshot virtual disk feature since it enables complete backups without any impact on the storage array 1 0 You cannot use a snapshot repository virtual disk as a source virtual disk or as a target virtual disk in a virtual disk copy If you select the source virtual disk as the target virtual disk of a virtual disk copy you must disable all snapshot virtual disks associated with the source virtual disk M ulti Path Softw are M ulti path software also referred to as the failover driver is a software resident on the host server that provides management of the redundant data path between the host server and the storage array 54 l Planning M D3200 Series Storage Array Terms and Concepts The multi path software identifies the existence of multiple paths to a virtual disk and establishes a preferred path to that disk If any component in the preferred path fails the multi path software automatically re routes I O requests to the alternate path so that the storage array continues to operate without interruption K NOTE M ulti path software available on the M D3200 Series resource media Preferred and Alternate Controllers and Paths A preferred controller isa RAID controller module designated as the owner of a virtual disk or disk group T he preferred controller is automatically selected by M DSM when a virtual disk is created You can change the pr
147. formation on defining the hosts see D efining a Host on page 86 To enable the host to write to the storage array you must map the host to the virtual disk This mapping grants a host or a host group access to a particular virtual disk or to a number of virtual disks in a storage array You can define the mappings on the M appings tab in the AMW On the Summary tab in the AM W the H osts amp M appings area indicates how many hosts are configured to access the storage array You can click C onfigured H osts in the H osts amp M appings area to see the names of the hosts A collection of elements such as default host groups hosts and host ports are displayed as nodes in the Topology pane of the M appings tab in the AMW The host topology is reconfigurable You can perform the following tasks e Create a host and assign an alias or user label e Add or associate a new host port identifier to a particular host Configuration About YourHost 85 Change the host port identifier alias or user label e Moveor associate a host port identifier to a different host e Replace a host port identifier with a new host port identifier e Manually activate an inactive host port so that the port can gain access to host specific or host group specific LUN mappings e Change the host port type to another type e Movea host from one host group to another host group e Remove a host group a host or a host port identifier Rename a host
148. g a Hard Drive Into a 2 5 Hard Drive Carrier 1 screws 4 2 hard drive 3 SAS screw hole 4 hard drive carrier 208 Management Installing Array Components Installing a Hard Drive Into a Hard Drive Carrier 1 2 3 Insert the hard drive into the hard drive carrier with the connector end of the drive at the back See Figure 15 5 Align the screw holes on the hard drive with the back set of holes on the hard drive carrier W hen aligned correctly the back of the hard drive is flush with the back of the hard drive carrier Attach the four screws to secure the hard drive to the hard drive carrier RAID Controller M odule An M D3200 Series storage array supports single as well as dual RAID controller configurations If only one RAID controller module is installed in your array it must be installed in slot 0 You must install the RAID controller module blank in slot 1 A CAUTION RAID controller modules can be removed and installed w ithout turning off the array Itis recommended that you do not remove the RAID controller module while data is being transferred Replacing or installing a RAID controller module thatis connected to a host server causes it to loose communication with the array and may require a reboot of the host server Removing a RAID Controller M odule Blank A CAUTION To maintain proper system cooling you must install a RAID controller 1 2 3 module blank in the empty slot Turn off the array a
149. g a segment size change two scenarios illustrate different approaches to the limitations e If I O activity stretches beyond the segment size you can increase it to reduce the number of disks required for a single I O Using a single physical disk for a single request frees disks to service other requests especially when you have multiple users accessing a database or storage environment e If you use the virtual disk in a single user large 1 O environment such as for multimedia application storage performance can be optimized when a single I O request is serviced with a single data stripe the segment size multiplied by the number of physical disks in the disk group used for data storage In this case multiple disks are used for the same request but each disk is only accessed once Virtual Disk Capacity Expansion W hen you configure a virtual disk you select a capacity based on the amount of data you expect to store H owever you may need to increase the virtual disk capacity for a standard virtual disk by adding free capacity to the disk group This creates more unused space for new virtual disks or to expand existing virtual disks Disk Group Expansion Because the storage array supports hot pluggable physical disks you can add two physical disks at a time for each disk group while the storage array remains online D ata remains accessible on virtual disk groups virtual disks and physical disks throughout the operation T he
150. ging the security key does not destroy any data You can change the security key at any time Before you change the security key ensure that e All virtual disks in the storage array are in O ptimal status e In storage arrays with two RAID controller modules both are present and working normally To change the security key 1 Inthe AM W toolbar select Storage Array Physical D isk Security gt C hange Security Key The Confirm C hange Security Key window is displayed 2 Typeyesin the text field and click OK The C hange Security Key window is displayed 110 Configuration Disk Groups and Virtual Disks 3 In Secure key identifier enter a string that becomes part of the secure key identifier You may leave the text box blank or enter up to 189 alphanumeric characters without white space punctuation or symbols Additional characters are generated automatically 4 Edit the default path by adding a file name to the end of the path or click Browse navigate to the required folder and enter the name of the file 5 In Pass phrase enter a string for the pass phrase The pass phrase must be between 8 and 32 characters long e contain at least 1 uppercase letter e contain at least 1 lowercase letter e contain at least 1 number e contain at least 1 non alphanumeric character for example lt gt The pass phrase that you enter is masked 6 In Confirm pass phrase re enter the exact string you entered in Pa
151. group or a host Using the Mappings Tab In the M appings tab you can Define hosts and hosts groups e Add mappings to the selected host groups For more information see the PowerVault M odular Disk Storage M anager online help topics Defining a Host You can use the D efine Host W izard in the AMW to define a host for a storage array Either a known unassociated host port identifier or a new host port identifier can be added K NOTE A user label must be specified before the host port identifier may be added the add button is disabled until one is entered To define a host 1 Inthe AMW select the M appings tab and select the appropriate storage array 2 Perform one of the actions e Select M appings D efine gt H ost e Select the Setup tab and click M anually D efine H osts 86 Configuration About Your Host 10 e Select the M appings tab Right click the root node storage array name Default G roup node or H ost Group node in the Topology pane to which you want to add the host and select D efine gt H ost from the pop up menu The Specify H ost Name window is displayed In Host name enter an up to 30 character alphanumeric name Select the relevant option in Do you plan to use the storage partitions in the this storage array and click Next The Specify H ost Port Identifiers window is displayed Select the relevant option to add a host port identifier to the host you can select Add
152. have created a security key for the storage array the Create Security Key option is inactive with a check mark to the left The Change Security Key option the Save Security Key option and the Validate Security Key option are now active T he Secure Physical D isks option is displayed in the D isk G roup menu The Secure Physical Disks option is active if these conditions are true K The selected storage array is not security enabled but is comprised entirely of security capable physical disks The storage array contains no snapshot source virtual disks or snapshot repository virtual disks The disk group isin an O ptimal state A security key is set up for the storage array NOTE The Secure Physical Disks option is inactive if these conditions are not true The Secure Physical Disks option is inactive with a check mark on the left if the disk group is already security enabled Configuration Disk Groups and Virtual Disks 107 The Create a secure disk group option is displayed in the C reate Disk Group W izard Disk Group Name and Physical Disk Selection dialog The Create a secure disk group option is active only when these conditions are met e A security key is installed in the storage array e Atleast one security capable physical disk is installed in the storage array All of the physical disks that you selected on the Physical tab are security capable physical disks You can erase security enabled physical disks
153. he RAID controller module failsover if it experiences up to 10 single bit errors or up to 3 multi bit errors PCI Errors The storage array firmware can detect and only recover from PC errors when the RAID controller modules are configured for redundancy If a virtual disk uses cache mirroring it fails over to its peer RAID controller module which initiates a flush of the dirty cache Critical Conditions The storage array generates a critical event if the RAID controller module detects a critical condition that could cause immediate failure of the array and or loss of data T he storage array isin a critical condition if one of the following occurs e More than one fan has failed e Any backplane temperature sensors in the critical range 262 Troubleshooting Your Array Backplane power supply failure Two or more temperature sensors are unreadable Failure to detect or unable to communicate with peer port K NOTE If both RAID controller modules fail simultaneously the enclosure cannot issue critical or noncritical event alarms for any enclosure component W hen the enclosure is under critical condition its enclosure status LED blinks amber Noncritical Conditions A noncritical condition is an event or status that does not cause immediate failure but must be corrected to ensure continued reliability of the storage array Examples of noncritical events include the following One power supply has failed One cooling
154. he associated physical disks to a different storage array After you install those physical disks in the new storage array you must unlock the physical disks before data can be read from or written to the physical disks To unlock the physical disks you must supply the security key from the original storage array T he security key on the new storage array is different and cannot unlock the physical disks You must supply the security key from a security key file that was saved on the original storage array You must provide the pass phrase that was used to encrypt the security key file to extract the security key from this file For more information see the PowerVault M odular Disk Storage M anager online help topics Erasing Secure Physical Disks In the AM W when you select a security enabled physical disk that is not part of adisk group the Secure E rase menu item is enabled on the Physical Disk menu You can use the secure erase procedure to re provision a physical disk You can use the Secure Erase option if you want to remove all of the data on the physical disk and reset the physical disk security attributes CAUTION Possible loss of data access The Secure Erase option removes all of the data that is currently on the physical disk This action cannot be undone Before you complete this option make sure that the physical disk that you have selected is the correct physical disk You cannot recover any of the data that is curre
155. he data at a more appropriate time in order to increase controller performance In dual active controller configurations with W rite back C aching enabled the write data is always mirrored to the cache of the second controller before completion status is issued to the host initiator W rite Back C ache is enabled by default unless cache mirroring is disabled Write Through Cache In write through cache data is written to the physical disk before completion status is returned to the host operating system W rite through cache is considered more robust than write back cache since a power failure is less likely to cause loss of data The RAID controller automatically switches to write through if cache mirroring is disabled or if the battery is missing or hasa fault condition 36 Planning RAID Controller M odules Planning M D3200 Series Storage Array Terms and Concepts This chapter explains the terms and concepts used for configuration and operation of the M D 3200 Series storage arrays Physical Disks Virtual Disks and Disk Groups Physical disks in your storage array provide the physical storage capacity for your data Before you can begin writing data to the storage array you must configure the physical storage capacity into logical components called disk groups and virtual disks A disk group is a set of physical disks upon which multiple virtual disks are created The maximum number of physical disks supported in a disk group
156. he storage array On the Logical tab select an U nconfigured C apacity node and select Virtual D isk C reate Alternatively you can right click the Unconfigured C apacity node and select C reate Virtual Disk from the pop up menu To create a virtual disk from free capacity on a disk group On the Logical tab select a Free C apacity node and select Virtual Disk gt Create Alternatively you can right click the Free C apacity node and select C reate Virtual D isk from the pop up menu To create a virtual disk from unassigned physical disks in the storage array On the Physical tab select one or more unassigned physical disks of the same physical disk type and select Virtual D isk C reate Alternatively you can right click the unassigned physical disks and select C reate Virtual D isk from the pop up menu To create a secure virtual disk On the Physical tab select one or more unassigned security capable physical disks of the same physical disk type and select Virtual D isk C reate Alternatively you can right click the unassigned security capable physical disks and select Create Virtual Disk from the pop up menu If you chose an Unconfigured C apacity node or unassigned physical disks to create a virtual disk the Disk G roup Required dialog is displayed Click Yes and create a disk group by using the C reate D isk G roup Wizard T he C reate Virtual Disk Wizard is displayed after you create the disk group If you
157. hese components contains firmware Some versions of firmware are dependent on other versions of firmware To capture information about all of the firmware versions in the storage array view the firmware inventory If the firmware inventory does not contain information for a particular storage array the firmware inventory service is not available on that storage array You can also save the firmware inventory to a text file You can then send the file to your Technical Support representative to detect any firmware mismatches View ing the Firmware Inventory To view the firmware inventory 1 Perform one of these actions based on whether you want to view the firmware information for one storage array or all storage arrays e One storage array From the Array M anagement Window select Advanced M aintenance gt Firmware Inventory e All storage arrays From the Enterprise M anagement Window select Tools Firmware Inventory 2 To save the firmware inventory to a text file click Save As 3 In Specify filename enter a name for the file to be saved You may also specify another physical disk and directory if you want to save the file in a location other than the default K NOTE The suffix txt is added to the file name automatically if you do not specify a suffix for the file name 4 Click Save An ASCII text file that contains the firmware inventory is saved to the designated directory Management Firmware Invento
158. hows a status of Operation in Progress In addition the snapshot repository virtual disk shows its original capacity and the total capacity being added The virtual disk involved shows a reduction in capacity If all of the free capacity is used to increase the size of the virtual disk the Free Capacity node involved is removed from the L ogical tab Configuration Premium Feature Snapshot Virtual Disks 153 154 7 10 11 12 13 If unassigned physical disks are not available do you have empty slots in the expansion enclosures e Yes there are empty slots Insert new physical disks by using the information in the initial setup guide for your expansion enclosure Go to step 9 e No there are no empty slots Install another expansion enclosure and additional physical disks Use the information in the initial setup guides for your RAID controller module and your expansion enclosure Go to step 9 NOTE The physical disks that you add must be of the same media type and interface type as the physical disks that already make up the disk group of the snapshot repository virtual disk Click Add Physical D isks K NOTE The physical disks that are displayed has a capacity that is either the same size or larger than the capacity of the physical disks already being used by the disk group Select either a single physical disk to add or two physical disks to add Click Add The Add Physical D isks window closes
159. iated with the target virtual disk if any exist If you select a source virtual disk of a snapshot virtual disk you must disable all of the snapshot virtual disks that are associated with the source virtual disk before you can select it as a target virtual disk Otherwise the source virtual disk cannot be used as a target virtual disk A virtual disk copy overwrites data on the target virtual disk and automatically makes the target virtual disk read only to hosts If 16 virtual disk copies with the status of In Progress exist any subsequent virtual disk copy has the status Pending which stays until one of the 16 virtual disk copies complete 168 Configuration Premium Feature Virtual Disk Copy Virtual Disk Copy and Modification Operations If a modification operation is running on a source virtual disk or a target virtual disk and the virtual disk copy has a status of In Progress Pending or Failed the virtual disk copy does not take place If a modification operation is running on a source virtual disk or a target virtual disk after a virtual disk copy is created the modification operation must complete before the virtual disk copy can start If a virtual disk copy has a status of In Progress any modification operation does not take place Create Copy Wizard The Create C opy W izard guides you through e Selecting a source virtual disk from a list of available virtual disks e Selecting a target virtual disk from a list of ava
160. if_no_path feature is set applications may hang To overcome these conditions the you must enter the following command for each affected multipath device dmsetup message device 0 fail_if_no_path where device isthe multipath device name for example mpath2 do not specify the path 1 0 may hang when a Device M apper device is deleted before the volume is unmounted If the scsi_ dh_rdac module is not included in initrd slower device discovery may be seen and the syslog may become populated with buffer 1 0 error messages 1 0 may hang if the host server or storage array is rebooted while I O is active All I O to the storage array must be stopped before shutting down or rebooting the host server or storage array After a failed path is restored on an M D3600i Series array failback does not automatically occur because the driver cannot auto detect devices without a forced rescan Run the command rescan_dm_devs to force a rescan of the host server This restores the failed paths enabling failback to occur Failback can be slow when the host system is experiencing heavy I O The problem is exacerbated if the host server is also experiencing very high processor utilization The Device M apper M ultipath service can be slow when the host system is experiencing heavy I O The problem is exacerbated if the host server also experiences very high processor utilization If the root disk is not blacklisted in the multipath conf file
161. ilable virtual disks e Setting the copy priority for the virtual disk copy W hen you have completed the wizard dialogs the virtual disk copy starts and data is read from the source virtual disk and written to the target virtual disk O peration in Progress icons are displayed on the source virtual disk and the target virtual disk while the virtual disk copy has a status of In Progress or Pending Failed Virtual Disk Copy A virtual disk copy can fail due to e A read error from the source virtual disk e A write error to the target virtual disk e A failure in the storage array that affects the source virtual disk or the target virtual disk W hen the virtual disk copy fails a critical event is logged in the E vent Log and a Needs Attention icon is displayed in the AM W W hilea virtual disk copy has this status the host has read only access to the source virtual disk Read requests from and write requests to the target virtual disk do not take place until the failure is corrected by using the Recovery Guru Configuration Premium Feature Virtual DiskCopy 169 Preferred RAID Controller Module Ownership During a virtual disk copy the same RAID controller module must own both the source virtual disk and the target virtual disk If both virtual disks do not have the same preferred RAID controller module when the virtual disk copy starts the ownership of the target virtual disk is automatically transferred to the preferred RAID
162. ingle log entry at a time To save the event log click Save As The Save E vents dialog is displayed Navigate to the relevant folder enter the relevant file name and click Save To erase all log entries from the event log click C lear All To exit the event log click C lose For more information see the PowerVault M odular Disk Storage M anager online help topics Recovery Guru The Recovery Guru is a component of M DSM that diagnoses critical events on the storage array and recommends step by step recovery procedures to resolve the problems In the AM W to display Te Guru perform one of these actions Click Recovery G uru In the Support tab click the Recover from Failure link From the Status pane on the Summary tab click the Storage Array N eeds Attention link Troubleshooting Your Storage Array Software 235 You can detect a problem using the following indicators e Non Optimal status icons Alert notification messages that are sent to the appropriate destinations e Hardware indicator lights The status icons return to Optimal status as problems are resolved Storage Array Profile The storage array profile provides a description of all of the components and properties of the storage array T he storage array profile also provides the option to save the storage array profile information to a text file You may want to use the storage array profile as an aid during recovery or as an overview of the current
163. ion see the PowerVault M odular Disk Storage M anager online help topics M anaging Host Groups A host group isa logical entity of two or more hosts that share access to specific virtual disks on the storage array You create host groups with MDSM All hosts in a host group must have the same host type operating system In addition all hosts in the host group must have special software such as clustering software to manage virtual disk sharing and accessibility If ahost is part of a cluster every host in the cluster must be connected to the storage array and every host in the cluster must be added to the host group Creating a Host Group To create host groups 1 Inthe AMW select the M appings tab 2 Inthe Topology pane select the storage array or the D efault Group 3 Perform one of the following actions Select M appings gt D efine H ost Group 88 Configuration About Your Host e Right click the storage array or the D efault G roup and select Define H ost Group from the pop up menu 4 Type the name of the new host group in Enter new host group name 5 Select the appropriate hosts in the Select hosts to add area 6 Click Add K NOTE To remove hosts select the hosts in the Hosts in group area and click Remove 7 Click OK The host group is added to the storage array Adding a Host to a Host Group You can add a host to an existing host group or a new host group using the Define H ost Wizard For
164. ion about the general mapping formats On RHEL hosts a partition node has the format dev mapper mpath lt x gt p lt y gt where lt x gt is the alphabetic number for the multipathing device lt y gt is the partition number for this device Configuration Device Mapper Multipath for Linux 183 On SLES 11 x hosts a partition node has the format dev mapper mpath lt x gt part lt y gt where lt x gt is letter s assigned to the multipathing device and lt y gt is the partition number On SLES 10 3 hosts a partition node has the format dev mapper mpath lt x gt _part lt y gt where lt x gt isthe letter s assigned to the multipathing device and lt y gt is the partition number NOTE After creating a partition on a multipathing device all 1 0 operations including file system creation raw I O and file system I O must be done through the partition node and not through the multipathing device nodes Create a File System on a Device Mapper Partition Use the standard mk s command to create the file system on the newly created Device M apper partition For example mkfs t lt filesystem type gt dev mapper lt partition node gt where lt partition node gt is the partition on which the file system is created Mount a Device Mapper Partition Use the standard mount command to mount the Device M apper partition mount dev mapper lt partition_node gt lt mounting_point gt Ready for Use
165. ions If the LEDs successfully stop blinking a confirmation message is displayed Click OK Capturing the State Information Use the Troubleshooting C apture State Information option to capture information about the current state of your storage array and save the captured information to a text file You can then send the captured information to your Technical Support representative for analysis Potential to cause an unresponsive storage array T he State C apture option can cause a storage array to become unresponsive to both the host and the storage management station Use this option only under the guidance of your Technical Support representative 1 246 From the AM W select Advanced Troubleshooting C apture State Information Read the information in the C onfirm State C apture dialog and type yes to continue In the Specify filename text box enter a name for the file to be saved or browse to a previously saved file if you want to overwrite an existing file Use the convention filename dmp for the name of the file The suffix dmp is added to the file automatically if you do not specify a suffix for the file Click Start K NOTE Each test shows a status of Executing while it is in progress The test then shows Completed when it successfully finishes If any of the tests cannot be completed a status of Failed is displayed in the Execution summary window Monitor the progress and completion status of all
166. ipath F to flush out all stale mappings Failback doesnot happen as Sometimes the low level driver cannot auto detect expected with the array devices coming back with the array Run rescan_dm_devs to do a rescan of the hos server SCSI bus and re aggregate devices at multipathing layer 188 Configuration Device M apper M ultipath for Linux M anagement Firmw are Downloads Downloading RAID Controller and NVSRAM Packages A version number exists for each firmware file The version number indicates whether the firmware is a major version or a minor version You can use the Enterprise Management W indow EM W to download and activate both the major firmware versions and the minor firmware versions You can use the Array Management W indow AM W to download and activate only the minor firmware versions K NOTE Firmware versions are of the format aa bb cc dd Where aa is the major firmware version and bb cc dd is the minor firmware version Depending on which one changes firmware can be updated from EM W and AMW oronly EMW You can activate the files immediately or wait until a more convenient time You may want to activate the firmware or NVSRAM files at a later time because of these reasons Time of day Activating the firmware and the NVSRAM can take a long time so you can wait until 1 0 loads are lighter The RAID controller modules goes offline briefly to load the new firmware Type of package You may want t
167. irtual Disk gt Snapshot Re create 3 Type yes and click OK Snapshot Rollback The snapshot rollback feature allows you to revert the contents of a virtual disk to match a point in time image existing on a snapshot virtual disk During arollback the host server can still write data to the base virtual disk H owever the snapshot virtual disk is set as read only during the rollback operation and becomes available for write operations immediately after the rollback is complete The snapshot virtual disk cannot be restarted deleted or disabled during the rollback operation Configuration Premium Feature Snapshot Virtual Disks 157 The associated snapshot repository virtual disk must have sufficient capacity to process the rollback operation and the write operations from the host At most the snapshot repository virtual disk may need twice the size of the base disk plus additional metadata space equaling approximately 1 1000th that is 0 1 of the Base volume capacity K NOTE Due to host server write operations the content in the snapshot virtual disk may have changed since creation of the snapshot The rollback operation includes any changes made to the snapshot after it was created You can set priority for a rollback operation Higher priority allocates more system resources for the rollback operation and affects overall system performance Rules and Guidelines for Performing a Snapshot Rollback The following rules
168. irtual disks are not valid source virtual disks Snapshot repository virtual disks e Snapshot virtual disks e Target virtual disks that are participating in a virtual disk copy K NOTE Virtual Disk Copy is an Advanced Premium feature e You cannot create a snapshot of a virtual disk that contains unreadable sectors e You must satisfy the requirements of your host operating system for creating snapshot virtual disks Failure to meet the requirements of your host operating system results in an inaccurate snapshot of the source virtual disk or the target virtual disk in a virtual disk copy K NOTE Before you create a new snapshot of a source virtual disk stop any data access I O activity or suspend data transfer to the source virtual disk to ensure that you capture an accurate snapshot of the source virtual disk Close all applications including Windows Internet Explorer to make sure all I O activity has stopped K NOTE Removing the drive letter of the associated virtual disk s in Windows or unmounting the virtual drive in Linux helps to guarantee a stable copy of the drive for the Snapshot Before creating a snapshot virtual disk the host server has to be in the proper state To ensure that the host server is properly prepared to create a snapshot virtual disk you can either use an application to carry out this task or you can perform the following steps 1 Stop all 1 O activity to the source 144 Configuration
169. is 120 disks or 192 drives with Premium Feature activation for RAID 0 RAID 1 and RAID 10 and 30 drives for RAID 5 and RAID 6 You can create disk groups from unconfigured capacity on your storage array A virtual disk is a partition in a disk group that is made up of contiguous data segments of the physical disks in the disk group A virtual disk consists of data segments from all physical disks in the disk group Virtual disks and disk groups are set up according to how you plan to organize your data For example you may have one virtual disk for inventory a second virtual disk for financial and tax information and so on All virtual disks in a disk group support the same RAID level The storage array supports up to 255 virtual disks minimum size of 10 M B each that can be assigned to host servers Each virtual disk is assigned a Logical Unit Number LUN that is recognized by the host operating system Planning M D3200 Series Storage Array Terms and Concepts 37 Physical Disks Only Dell supported 6 0 G bps SAS physical disks are supported in the storage array If the storage array detects unsupported physical disks it marks the disk as unsupported and the physical disk becomes unavailable for all operations K NOTE The M D3200 Series storage array must contain at least two physical disks for proper operation This is necessary because the physical disks are used to store configuration information Physical Disk States Tabl
170. isk After the virtual disk copy is complete the source virtual disk becomes available to host applications for write requests To prevent error messages do not attempt to access a source virtual disk that is participating in a virtual disk copy while the virtual disk copy is in progress Configuration Premium Feature Virtual DiskCopy 163 Reasons to use virtual disk copy include e Copying data for improved access As your storage requirements for a virtual disk change you can use a virtual disk copy to copy data to a virtual disk in a disk group that uses drives with larger capacity within the same storage array C opying data for larger access capacity enables you to move data to greater capacity physical disks for example 61 GB to 146 GB e Restoring snapshot virtual disk data to the source virtual disk T he Virtual Disk Copy feature enables you first to restore the data from a snapshot virtual disk and then to copy the data from the snapshot virtual disk to the original source virtual disk e Creating a backup copy T he Virtual Disk C opy feature enables you to create a backup of a virtual disk by copying data from one virtual disk the source virtual disk to another virtual disk the target virtual disk in the same storage array minimizing the time that the source virtual disk is unavailable to host write activity You can then use the target virtual disk as a backup for the source virtual disk as a resource for
171. isk Operations 43 Virtual Disk Initialization 2 0 0 0 43 Background Initialization 43 Foreground Initialization 43 ConsistencyCheck 44 Media Verification 0004 44 Contents Cycle Times a ht 2 ee oa hes ees NN 44 Virtual Disk Operations Limit 45 Disk Group Operations 00 45 RAID LevelMigration 0 45 Segment Size Migration 45 Virtual Disk Capacity Expansion 46 Disk Group Expansion 46 Disk Group Defragmentation 47 Disk Group Operations Limit aaa 47 RAID Background Operations Priority 47 Virtual Disk Migration and Disk Roaming 48 Disk Migration 00 0004 48 DiskRoaming 000 0004 50 Advanced Features 50 Host Server to Virtual Disk Mapping 51 HOStTYP S sc ui s ka a Be bee 51 Snapshot Virtual Disks 0 51 Snapshot Repository Virtual Disk 52 Virtual DiskCopy 0040 53 Virtual Disk Recovery 05 54 Using Snapshot and Disk Copy Together 54 Multi Path Software 0 ee ee 54 Preferred and Alternate Controllers and Paths cies erect orean a oye Gen tet Mh Bebe 55 Virtual Disk Ownership 00 55 LoadBalancing 000 56 Monitoring M D3200 Series System Performance ee 57 Contents 5 5 Configuration Over
172. isplayed 6 Click OK Locating an Expansion Enclosure You can use the Blink option to physically locate and identify an expansion enclosure in the storage array TheLED activation varies according to the type of expansion enclosure that you have e If you have an expansion enclosure with a white LED the Blink Expansion Enclosure operation causes the white LED on the expansion enclosure to come on The LED does not blink e If you have any other types of expansion enclosures this operation causes the appropriate LED on all of the physical disks in the expansion enclosure to blink To locate the expansion enclosure 1 Select the Physical tab 2 Select a physical disk in the expansion enclosure that you want to locate 3 Select Physical Disk gt Blink E xpansion E nclosure TheLED or LEDson the expansion enclosure or physical disks come on 4 When you have located the expansion enclosure click OK The LEDs stop blinking If you have an expansion enclosure with a blue LED theLED goes off If any other blink operations Blink Storage Array Blink Disk Group Blink Physical Disk Ports Blink Expansion Enclosure or Troubleshooting Your Storage Array Software 245 6 Blink Physical Disk are currently being invoked from another storage management station these LEDs also stop blinking In the rare case that the LEDs on the expansion enclosure do not stop blinking from the AM W select Storage Array Blink Stop All Indicat
173. king device lt n a gt dev sg4 Activating hecking device lt n a gt dev sg6 Activating hecking device lt n a gt dev sg7 Activating hecking device lt n a gt dev sg8 Activating C Cc C Cc Checking device lt n a gt dev sg5 Activating Cc Cc C C hecking device lt n a gt dev sg9 Activating 252 Troubleshooting Your Storage Array Software Troubleshooting Your Array Safety First For you and Your Array VAN CAUTION Many repairs may only be done by a certified service technician You must only perform troubleshooting and simple repairs as authorized in your product documentation or as directed by the online or telephone service and support team Damage due to servicing that is not authorized by Dell is not covered by your warranty Read and follow the safety instructions that came with the product Troubleshooting Storage Array Startup Failure If your system halts during startup check if The array emits a series of beeps The array fault LEDs are lit See RAID Controller M odules on page 31 There is a constant scraping or grinding sound when you access the hard drive See Getting Help on page 265 Troubleshooting Loss of Communication For information about troubleshooting loss of communication see Troubleshooting Array and Expansion Enclosure C onnections on page 259 Troubleshooting External Connections Verify that the cables are connected to the correct ports
174. ks are accessed simultaneously The segment size or stripe element size specifies the size of data in a stripe written to a single disk The M D 3200 Series array supports stripe element sizes of 8 KB 16 KB 32 KB 64 KB 128 KB 256 KB and 512 KB The default stripe element size is 128 KB Stripe width or depth refers to the number of disks involved in an array where striping is implemented For example a four disk group with disk striping has a stripe width of four K NOTE Although disk striping delivers excellent performance striping alone does not provide data redundancy Virtual Disk Operations Virtual Disk Initialization Every virtual disk must be initialized Initialization can be done in the foreground or the background A maximum of four virtual disks can be initialized concurrently on each RAID controller module Background Initialization The storage array executes a background initialization when the virtual disk is created to establish parity while allowing full host server access to the virtual disks Background initialization does not run on RAID 0 virtual disks The background initialization rate is controlled by MD SM To change the rate of background initialization you must stop any existing background initialization The rate change is implemented when the background initialization restarts automatically Foreground Initialization The storage array supports foreground initialization for virtual disks A
175. le repairs as authorized in your product documentation or as directed by the online or telephone service and support team Damage due to servicing that is not authorized by Dell is not covered by your warranty Read and follow the safety instructions thatcame with the product 1 Check the storage array profile to ensure that the most current version of the firmware is installed For more information see the Support M atrix at dell com support manuals 2 Remove the hard drive from the system See Removing a Hard Drive on page 204 NOTE You must ensure that you check the hard drive indicators before removing the faulty hard drive from the system 3 Check the hard drives and the backplane to ensure that the connectors are not damaged 4 Reinstall the hard drive 5 Reboot the host server If the problem is not resolved proceed to step 6 6 Verify that the RAID controller module port link status LED and the RAID controller module status LED are solid green for each port that is connected to a cable 7 Replace the failed physical disk If the problem persists see Troubleshooting Loss of Communication on page 253 or see Getting Help on page 265 258 Troubleshooting Your Array Troubleshooting Array and Expansion Enclosure Connections 1 Verify that the RAID controller module port link status LED and the RAID controller module status LED are solid green for each port that is connected to a cable If the LEDs are not
176. le until the correct security key is provided by aRAID controller module You can view the self encrypting disk status of any physical disk in the storage array from the Physical D isk Properties dialog T he status information reports whether the physical disk is Security Capable Secure Security enabled or disabled Read Write Accessible Security locked or unlocked You can view the self encrypting disk status of any disk group in the storage array The status information reports whether the storage array is Security Capable e Secure 106 Configuration Disk Groups and Virtual Disks Table 9 1 shows how to interpret the security status of a disk group Table 9 1 Interpreting Security Status of a Disk Group Secure Security Capable Yes Security Capable No Yes No The disk group is composed of all Not applicable Only SED SED physical disks and isina physical disks can be in a Secure Secure state state The disk group is composed of all The disk group is not entirely SED physical disks and isina composed of SED physical disks Non Secure state The Physical Disk Security menu is displayed in the Storage Array menu T he Physical Disk Security menu has these options K Create Security Key Change Security Key Save Security Key File Validate Security Key Unlock Drives NOTE If you have not created a security key for the storage array the Create Security Key option is active If you
177. least outstanding I O requests queued For this policy an 1 O request is simply a command in the queue The type of command or the number of blocks that are associated with the command are not considered T he least queue depth with subset policy treats large block requests and small block requests equally The data path selected is one of the paths in the path group of the RAID controller module that owns the virtual disk 56 Planning M D3200 Series Storage Array Terms and Concepts Least path weight with subset Windows operating systems only The least queue depth with subset policy is also known as the least I Os or least requests policy This policy routes the next I O request to a data path that has the least outstanding I O requests queued For this policy an 1 0 request is simply a command in the queue The type of command or the number of blocks that are associated with the command are not considered The least queue depth with subset policy treats large block requests and small block requests equally The data path selected is one of the paths in the path group of the RAID controller module that owns the virtual disk M onitoring M D3200 Series System Performance You can use the Performance M onitor to select virtual disks and RAID controller modules to monitor or to change the polling interval Keep these guidelines in mind when using the Performance M onitor The Performance M onitor does not dynamically update its display if
178. lete the target virtual disk automatically becomes read only to the hosts T he target virtual disk rejects read and write requests while the virtual disk copy operation has a status of Pending or In Progress or if the operation fails before completing the copy Keep the target virtual disk Read Only enabled if you want to preserve the data on the target virtual disk for reasons such as the following If you are using the target virtual disk for backup purposes e If you are using the data on the target virtual disk to copy back to the source virtual disk of a disabled or failed snapshot virtual disk If you decide not to preserve the data on the target virtual disk after the virtual disk copy is complete change the write protection setting for the target virtual disk to Read W rite To set the target virtual disk read write permissions 1 Inthe AMW select Virtual Disk C opy M anager The C opy M anager window is displayed 2 Select one or more copy pairs in the table 3 Perform one of these actions 166 Configuration Premium Feature Virtual Disk Copy e Toenable Read Only permission select C hange Target Virtual D isk Permissions E nable Read 0 nly K NOTE Write requests to the target virtual disk are rejected when the Read Only permission is enabled on the target virtual disk e To disable Read Only permission select C hange gt Target Virtual Disk Permissions Disable Read 0 nly Virtual Disk Copy Rest
179. lick the host node and select Remove from the pop up menu The Remove dialog is displayed Click Yes The selected host group is removed For more information see the PowerVault M odular Disk Storage M anager online help topics Host Topology Host topology is the organization of hosts host groups and host interfaces configured for a storage array You can view the host topology in the M appings tab of the AM W For more information see Using the M appings Tab on page 86 The following tasks change the host topology 90 M oving a host or a host connection Renaming a host group a host or a host connection Adding a host connection Replacing a host connection Configuration About Your Host e Changing a host type MDSM automatically detects these changes for any host running the host agent software Starting or Stopping the Host Context Agent The host context agent discovers the host topology and starts and stops with the host The topology discovered by the host context agent can be viewed by clicking C onfigure H ost Access Automatic in the C onfigure tab in the MDSM You must stop and restart the host context agent to see the changes to the host topology if e A new storage array is attached to the host server e A host is added while turning on power to the RAID controller modules Linux To start or stop the host context agent enter the following command at the prompt SMagent start SMagent sto
180. lines in mind when you remove copy pairs e Removing copy pairs does not delete the data on the source virtual disk or target virtual disk e If the virtual disk copy has a status of In Progress you must stop the virtual disk copy before you can remove the copy pair To remove copy pairs 1 Inthe AMW select Virtual Disk C opy M anager The C opy M anager window is displayed 2 In thetable select one or more copy pairs 3 Select C opy gt Remove C opy Pairs The Remove C opy Pairs dialog is displayed 4 Click Yes 176 Configuration Premium Feature Virtual Disk Copy Configuration Premium Feature Upgrading to High Performance Tier The High Performance Tier premium feature on a M D 3200 Series array increases the performance of the system beyond that of a M D 3200 Series array operating at the standard performance level If this feature is ordered a Premium Feature Activation card is placed in the box with the storage array After reading the information below follow the instructions on the card to obtain a key file and enable the feature A CAUTION Loss of data access The storage array automatically restarts w hen the High Performance Tier feature is enabled or disabled During the restart data is unavailable Data availability is restored w hen the array restarts To upgrade from a standard performance tier storage array to a high performance tier storage array you enable the high performance tier premium fea
181. ll access to the virtual disk is blocked during foreground initialization During foreground initialization zeros 0x00 are written to every sector of the virtual disk The virtual disk is available after foreground initialization is completed Planning M D3200 Series Storage Array Terms and Concepts 43 Consistency Check A consistency check verifies the correctness of data in a redundant array RAID levels 1 5 6 and 10 For example in a system with parity checking consistency involves computing the data on one physical disk and comparing the results to the contents of the parity physical disk A consistency check is similar to a background initialization T he difference is that background initialization cannot be started or stopped manually while consistency check can K NOTE Itis recommended that you run data consistency checks on a redundant array at least once a month This allows detection and automatic replacement of unreadable sectors Finding an unreadable sector during a rebuild of a failed physical disk is a serious problem because the system does not have the redundancy to recover the data M edia Verification Another background task performed by the storage array is media verification of all configured physical disks in a disk group The storage array uses the Read operation to perform verification on the space configured in virtual disks and the space reserved for the metadata Cycle Time The media verific
182. lowing tasks must be completed before proceeding For more information about steps 1 and 2 see the M D 3200 and M D 3220 Storage Arrays Deployment G uide at dell com support manuals For more information about step 3 see Creating Virtual Disks on page 98 1 Install the host software from M D 3200 Series resource media Insert the resource media to start the installation of M odular Disk Storage M anager MDSM K NOTE Red Hat install of 5 x needs a remount of the DVD media to make contents executable Reboot when prompted by the install program T he installation program prompts for and needs a reboot at completion of install Create and map virtual disks using M D SM After configuring the arrays using the M odular Disk Configuration Utility M DCU run the M DSM to create and map virtual disks Using the MDSM software 1 2 3 180 M ap the host server to the M D 3200 Series storage array Create the Virtual Disks M ap newly created arrays to your host server K NOTE Any array configured with M DCU automatically adds to the list of Devices in the PowerVault M odular Disk Storage M anager Enterprise Management Window EM W Configuration Device M apper M ultipath for Linux Device M apper Configuration Steps To complete the DM multipathing configuration and make the storage available to the Linux host server 1 Scan for virtual disks See Scan for Newly Added Virtual Disks on page 181 2 Display
183. lps you associate the snapshot repository virtual disk to its corresponding snapshot virtual disk and source virtual disk e Capacity Allocation T his parameter allows you to choose where to create the snapshot repository virtual disk You can allocate capacity by using one of the following methods Use free capacity on the same disk group where the source virtual disk resides Use free capacity on another disk group Useunconfigured capacity and create a new disk group for the snapshot repository virtual disk 146 Configuration Premium Feature Snapshot Virtual Disks Dell recommends placing the snapshot repository virtual disk within the disk group of the source virtual disk This ensures that if drives associated with the disk group are moved to another storage array all the virtual disks associated with the snapshot virtual disk remain in the same group Snapshot Repository Virtual Disk C apacity T he snapshot repository virtual disk capacity is expressed as a percentage of the source virtual disk capacity maximum 220 percent Percent Full W hen the snapshot repository virtual disk reaches the user specified repository full percentage level the event is logged in the M ajor Event Log MEL The default snapshot repository full percentage level is 50 of the source virtual disk Snapshot Repository Virtual Disk Full C onditions C hoose whether to fail writes to the source virtual disk or fail the snapsh
184. ly perform troubleshooting and simple repairs as authorized in your product documentation or as directed by the online or telephone service and support team Damage due to servicing that is not authorized by Dell is not covered by your warranty Read and follow the safety instructions that came with the product 1 Align the backup battery unit with the slots on the RAID controller module 2 Slide the backup battery unit toward the connector on the RAID controller module 3 Tighten the screw that secures the backup battery unit to the RAID controller module 4 ClosetheRAID controller module See Closing the RAID Controller M odule on page 213 5 Replacethe RAID controller module See Installing a RAID Controller Module on page 212 6 Connect all the cables to the array 7 Turn on the array and the host server Management Installing ArrayComponents 215 Power Supply Cooling Fan Module K NOTE Your storage array includes two integrated hot swappable power supply cooling fan modules The array supports two hot swappable power supply cooling fan modules W hile the array can operate temporarily with one module both the modules must be present for proper system cooling A CAUTION A single pow er supply cooling fan module can be removed from a pow ered on array for a maximum period of 5 minutes Beyond that time the array may automatically shut dow n to prevent damage Removing a Pow er Supply Cooling Fan M odule A C
185. ly stop blinking a confirmation message is displayed 5 Click OK Creating Virtual Disks Keep these important guidelines in mind when you create a virtual disk 98 M any hosts can have 256 logical unit numbers LUNs mapped per storage partition but the number varies per operating system After you create one or more virtual disks and assign a mapping you must register the virtual disk with the operating system In addition you must make sure that the host recognizes the mapping between the physical storage array name and the virtual disk name D epending on the operating system run the host based utilities hot_add and SM devices If the storage array contains physical disks with different media types or different interface types multiple Unconfigured C apacity nodes may be displayed in the Logical pane of the Logical tab Each physical disk type has an associated U nconfigured C apacity node if unassigned physical disks are available in the expansion enclosure You cannot create a disk group and subsequent virtual disk from different physical disk technology types Each physical disk that comprises the disk group must be of the same physical disk type Configuration Disk Groups and Virtual Disks K NOTE Ensure that you create disk groups before creating virtual disks To create virtual disks 1 Choose one of these methods to start the Create Virtual Disk W izard To create a virtual disk from unconfigured capacity in t
186. management operations being performed and the number of management sessions taking place together determine the number of TCP IP connections made to aRAID controller module T his problem is self correcting because after some TCP IP connections terminate the RAID controller module then becomes responsive to other connection attempts If the storage array is still unresponsive a problem may exists with the RAID controller modules C ontact your Technical Support representative Locating a Physical Disk You can use the Locate Physical Disk option to physically locate and identify one or more of the physical disks in an expansion enclosure by activating physical disk LEDs To locate the physical disk 1 Select the Physical tab 2 Select the physical disks that you want to locate 3 Select Physical Disk gt Blink Physical Disk 244 The LEDs on the selected physical disks blink Troubleshooting Your Storage Array Software 4 When you have located the physical disks click OK The LEDs stop blinking If any other blink operations Blink Disk Group Blink Storage Array Blink Physical Disk Ports or Blink Expansion Enclosure are currently being invoked from another storage management station these LEDs also stop blinking 5 Inthe rare case that the LEDs on the physical disks do not stop blinking in the AM W select Storage Array Blink Stop All Indications If the LEDs successfully stop blinking a confirmation message is d
187. mance data that can help troubleshoot any problem with the storage array All the files are compressed into a single archive in a zipped file format You can forward the archive file to your Technical Support representative for troubleshooting and further analysis To generate the support data report 232 1 IntheAMW perform one of these actions Select Advanced gt Troubleshooting Support D ata C ollect Select the Support tab and click Gather Support Information The Collect All Support D ata window is displayed Troubleshooting Your Storage Array Software K Enter a name for the support data file in Specify filename or click Browse to navigate to a previously saved file to overwrite an existing file The suffix zip is added automatically to the file if you do not specify a suffix for the file Enter the E xecution summary Click Start After all of the support files are gathered they are archived using the file name that you specified Click OK NOTE If a support data operation is running it must complete before another support data operation can begin Concurrent collections are not supported and results in an error message Automatically Collect the Support Bundle Data You can use the Collect Support Bundle option to automatically save a copy of the support bundle when the client monitor process detects a critical event During a critical event the support bundle is saved to the local physic
188. mium Feature Snapshot Virtual Disks About the Simple Path Using the simple path you can specify e Snapshot Virtual Disk Name A user specified name that helps you associate the snapshot virtual disk to its corresponding snapshot repository virtual disk and source virtual disk e Snapshot Repository Virtual Disk Name A user specified name that helps you associate the snapshot repository virtual disk to its corresponding snapshot virtual disk and source virtual disk e Snapshot Repository Virtual Disk C apacity T he snapshot repository virtual disk capacity is expressed as a percentage of the source virtual disk capacity maximum 220 percent Schedule C reates the snapshot virtual disk at a specified time or according to a regularly occurring interval If no schedule is specified the snapshot operation begins immediately T his parameter can also be used to apply a schedule to an existing snapshot virtual disk Using the simple path the following defaults are used for the other parameters of a snapshot virtual disk e Capacity Allocation T he snapshot repository virtual disk is created using free capacity on the same disk group where the source virtual disk resides e Host to Virtual Disk M apping T he default setting is M ap now e Percent Full W hen the snapshot repository virtual disk reaches the specified repository full percentage level the event is logged in the M ajor Event Log MEL The default snapshot
189. mpleted successfully but the snapshot data is not updated properly Follow any additional instructions for your operating system Failure to follow these additional instructions can create unusable snapshot virtual disks NOTE If your operating system requires additional instructions you can find those instructions in your operating system documentation Configuration Premium Feature Snapshot Virtual Disks Re creating Snapshot Virtual Disks You can re create a snapshot virtual disk that you have previously disabled CAUTION Possible loss of data redundancy If the snapshot virtual disk is in Optimal status it is first disabled prior to being re created This action invalidates the current snapshot Keep these important guidelines in mind when you re create a snapshot virtual disk e To recreate the snapshot virtual disks correctly follow the instructions for your operating system K NOTE Failing to follow these additional instructions could create unusable snapshot virtual disks For more information see the PowerVault M odular Disk Storage M anager online help topics e To use this option the snapshot virtual disk must be either in an Optimal status or Disabled status e When using this option the previously configured snapshot name parameters and snapshot repository virtual disk are used To recreate the snapshot virtual disk 1 IntheAMW select the Logical tab select a snapshot virtual disk 2 Select V
190. n Reasons for Scheduling a Snapshot Virtual Disk 00 140 Guidelines for Creating SnapshotSchedules 141 Enabling and Disabling Snapshot Schedules 2 2 0 0 142 Creating a Snapshot Virtual Disk Using the Simple Path 0 00 5 142 AbouttheSimplePath 143 Preparing Host Servers to Create the Snapshot Using the Simple Path 143 Creating a Snapshot Virtual Disk Using the AdvancedPath 0 0000 146 About the AdvancedPath 146 Preparing Host Servers to Create the Snapshot Using the AdvancedPath 147 Creating the Snapshot Using theAdvancedPath 149 Specifying Snapshot Virtual Disk Names 151 Snapshot Repository Capacity 152 Disabling a Snapshot Virtual Disk 155 Preparing Host Servers to Re create a Snapshot Virtual Disk 0 0 156 Re creating Snapshot Virtual Disks 157 Snapshot Rollback 0004 157 Rules and Guidelines for Performing a Snapshot Rollback 00 158 Protecting Against a Failed Snapshot Rollback 00 159 Previous Versions of the MD Storage Manager 0 159 Starting a SnapshotRollback 159 Contents Resuming a Snapshot Rollback Canceling a Snapshot Rollback 11 Configuration Premium Feature Virtual Disk Copy Types of Virtual Disk Copies ONE
191. n remove the physical disks for offline storage or you can import the disk group to a different storage array After you complete the export disk group operation all of the physical disks are offline Any associated virtual disks or free capacity nodes are no longer shown in MDSM Non Exportable Components You must remove or clear any non exportable settings before you can complete the export disk group procedure Remove or clear the following settings e Persistent reservations e Host to virtual disk mappings e Virtual disk copy pairs e Snapshot virtual disks and snapshot repository virtual disks Configuration Disk Groups and Virtual Disks 133 e Remote mirror pairs e Mirror repositories Exporting a Disk Group On the source storage array 1 Save the storage array configuration 2 Stop all I O and unmount or disconnect the file systems on the virtual disks in the disk group Back up the data on the virtual disks in the disk group Locate the disk group and label the physical disks Place the disk group offline Obtain blank physical disk modules or new physical disks the target storage array Verify that the target storage array has available physical disk slots Verify that the target storage array supports the physical disks that you import 3 Verify that the target storage array can support the new virtual disks 4 Verify that the latest version of firmware is installed on the RAID controller module O N e DSTO
192. n the data path to the preferred RAID controller module the virtual disk ownership is moved to the alternate non preferred RAID controller module for processing T his feature is called failover Drivers for multi path frameworks such as M icrosoft M ulti Path 1O M PIO and Linux Device M apper DM are installed on host systems that access the storage array and provide I O path failover For more information on Linux DM please see C onfiguration Device M apper M ultipath for Linux on page 179 For more information on M PIO please see microsoft com K NOTE You must have the multi path driver installed on the hosts at all times even in a configuration where there is only one path to the storage system such as a single port cluster configuration During a failover the virtual disk transfer is logged as a critical event and an alert notification is sent automatically if you have configured alert destinations for the storage array 92 Configuration About Your Host M anaging Host Port Identifiers You can manage the host port identifiers that are added to the storage array You can e Add Add or associate a new host port identifier to a particular host e Edit Change the host port identifier alias or user label You can move associate the host port identifier to a new host e Replace Replace a particular host port identifier with another host port identifier Remove Remove the association between a particular host
193. napshot of a source virtual disk stop any data access I O activity or suspend data transfer to the source virtual disk and Snapshot virtual disk to ensure that you capture an accurate snapshot of the source virtual disk Close all applications including Windows Internet Explorer to make sure all I O activity has stopped NOTE Removing the drive letter of the associated virtual disk in Windows or unmounting the virtual drive in Linux helps to guarantee a stable copy of the drive for the Snapshot Before re creating a snapshot virtual disk both the host server and the associated virtual disk you are re creating have to be in the proper state To prepare your host server and virtual disk 1 2 156 Stop all I O activity to the source and snapshot virtual disk if mounted Using your W indows system flush the cache to both the source and the snapshot virtual disk if mounted At the host prompt type SMrepassist f lt filename identifier gt and press lt Enter gt For more information see SM repassist Utility on page 247 Click the Summary tab then click Disk Groups amp Virtual Disks to ensure that the snapshot virtual disk isin O ptimal or Disabled status Remove the drive letter s of the source and if mounted snapshot virtual disk in Windows or unmount the virtual drive s in Linux to help guarantee a stable copy of the drive for the Snapshot If this is not done the snapshot operation reports that it has co
194. napshot virtual disk NOTE In some cases conflicts may result from mapping the same host to both a source virtual disk and its associated snapshot virtual disk This conflict depends on the host operating system and any virtual disk manager software in use To register the snapshot virtual disk with the host operating system run the host based hot_add utility Configuration Premium Feature Snapshot Virtual Disks 145 13 To associate the mapping between the storage array name and the virtual disk name run the host based SM devices utility K NOTE If your operating system requires additional instructions you can find those instructions in your operating system documentation Creating a Snapshot Virtual Disk Using the Advanced Path About the Advanced Path Use the advanced path to choose whether to place the snapshot repository virtual disk on free capacity or unconfigured capacity and to change the snapshot repository virtual disk parameters You can select the advanced path regardless of whether you use free capacity or unconfigured capacity for the snapshot virtual disk Using the advanced path you can specify the following parameters for your snapshot virtual disk Snapshot Virtual Disk Name A user specified name that helps you associate the snapshot virtual disk to its corresponding snapshot repository virtual disk and source virtual disk Snapshot Repository Virtual Disk Name A user specified name that he
195. nd host server Disconnect all the power cables connected to the array To remove the RAID controller module blank press down on the release latch and pull the blank away from the array See Figure 15 7 Install RAID controller modules in slot 0 and 1 See Installing a RAID Controller M odule on page 212 Management Installing ArrayComponents 209 5 Connect all the power cables to the array 6 Turn on the array and the host server Figure 15 7 Removing and Installing a RAID Controller Module Blank 1 release latch 2 RAID controller module blank Installing a RAID Controller M odule Blank To install a RAID controller module blank 1 Align the blank with the RAID controller module bay 2 Insert the blank into the chassis until it clicks into place 210 Management Installing Array Components Removing a RAID Controller Module A CAUTION Many repairs may only be done by a certified service technician You must only perform troubleshooting and simple repairs as authorized in your product documentation or as directed by the online or telephone service and support team Damage due to servicing that is not authorized by Dell is not covered by your warranty Read and follow the safety instructions that came with the product 1 Disconnect the cables connected to the RAID controller module 2 Push down on the release tab and pull the release lever away from the chassis See Figure 15 8 3 Grasp the release lever and pull the m
196. ng a Host 86 Dell contacting 265 Disk Group Creating 96 Expansion 131 Export 133 Exporting 134 Import 134 Locating 98 Migration 133 Disk Group and Virtual Disk Expansion 131 Disk Group Operations 45 Defragmentation 47 Expansion 46 Limit 47 RAID Level Migration 45 Segment Size M igration 45 Virtual Disk Capacity Expansion 46 Disk Groups and Virtual Disks Creating 95 Download NVSRAM Firmware 192 Physical Disk Firmware 195 RAID Controller and NVSRAM Firmware 190 RAID Controller and NVSRAM Packages 189 RAID controller module Firmware 197 drive carrier hard drive 207 E Enclosure Loss Protection 117 Enterprise M anagement W indow 62 Event Monitor 83 Enabling or Disabling 84 Linux 84 Windows 84 F Failed RAID Controller Module 170 Features and Indicators Front Panel 24 Firmware Downloads 189 Firmware Inventory 225 View 225 Free Capacity 132 front bezel installing 202 removing 202 H hard drive drive carrier 207 installing 206 Index 268 removing 204 Hard Drive Indicator Patterns 28 H ardware Features Back panel features 27 Front panel features 24 Hard drive indicator patterns 28 Power indicator codes 30 Power supply and cooling fan features 29 Host Group Adding 89 Create 88 Moving a Host 89 Removing a host 89 Removing a Host Group 90 Host Topology 90 Host to Virtual Disk Mapping 119 Host to Virt
197. ns to optimal status you have completed this procedure M ake sure that the power to the host is turned on and that the host is operational If applicable make sure that the host bus adapters are installed in the host Examine all external cables and switches or hubs to make sure that you cannot see any damage and that they are tightly connected If you have recently replaced or added the controller restart the host context agent software so that the new controller is found If a problem exists make the appropriate modifications to the host If you have an out of band storage array use the following procedure Click Refresh after each step to make sure of the results a M ake sure that the network can access the controllers by using the ping command Use the following syntax ping lt controller IP address gt If the network can access the controllers continue to step b If the network cannot access the controllers go to step c Remove the storage array with the unresponsive status from MDSM and add that storage array again If the storage array returns to optimal status you have completed this procedure Troubleshooting Your Storage Array Software 249 c Examine the ethernet cables to make sure that you cannot see any damage and that they are tightly connected d Make sure that the applicable network configuration tasks are done for example the IP addresses are assigned to each controller 5 Make sure
198. ntly on the physical disk After you complete the secure erase procedure the physical disk is available for use in another disk group or in another storage array For more information on the secure erase procedure see the PowerVault M odular Disk Storage M anager online help topics Configuration Disk Groups and Virtual Disks 113 Configuring Hot Spare Physical Disks Guidelines to configure host spare physical disks A You can use only unassigned physical disks with Optimal status as hot spare physical disks You can unassign only hot spare physical disks with Optimal or Standby status You cannot unassign a hot spare physical disk that has the In Use status A hot spare physical disk has the In Use status when it isin the process of taking over for a failed physical disk If a hot spare physical disk does not have O ptimal status follow the Recovery Guru procedures displayed by the MDSM application to correct any problem before trying to unassign the physical disk Hot spare physical disks must be of the same media type and interface type as the physical disks that they are protecting If there are secure disk groups and security capable disk groups in the storage array the hot spare physical disk must match the security capability of the disk group Hot spare physical disks must have capacities equal to or larger than the used capacity on the physical disks that they are protecting The availability of enclosure loss
199. nuals 52 Planning M D3200 Series Storage Array Terms and Concepts Virtual Disk Copy Virtual disk copy is a premium feature to Back up data e Copy data from disk groups that use smaller capacity physical disks to disk groups using greater capacity physical disks e Restore snapshot virtual disk data to the source virtual disk Virtual disk copy generates a full copy of data from the source virtual disk to the target virtual disk in a storage array and can be performed either online or offline Source Virtual Disk W hen you create a virtual disk copy a copy pair consisting of a source virtual disk and a target virtual disk is created on the same storage array W hen a virtual disk copy is started data from the source virtual disk is copied completely to the target virtual disk Target Virtual Disk W hen you start a virtual disk copy the target virtual disk maintains a copy of the data from the source virtual disk You can choose whether to use an existing virtual disk or create a new virtual disk as the target virtual disk If you choose an existing virtual disk as the target all data on the target is overwritten A target virtual disk can be a standard virtual disk or the source virtual disk of a failed or disabled snapshot virtual disk K NOTE The target virtual disk capacity must be equal to or greater than the source virtual disk capacity W hen you begin the disk copy process you must define the rate at which the
200. o test the new firmware on one storage array before loading the files onto other storage arrays The ability to download both files and activate them later depends on the type of RAID controller module in the storage array K NOTE You can use the command line interface to download and activate the firmware to several storage arrays by using a script For more information on the command line interface see the PowerVault M odular Disk Storage M anager online help topics M anagement Firmware Downloads 189 Dow nloading Both RAID Controller and NVSRAM Firmw are K NOTE 1 0 to the array can continue while you are upgrading RAID controller and NVSRAM firmware K NOTE Dell recommends that the firmware and NVSRAM be upgraded during a maintenance period when the array is not being used for I O K NOTE The RAID enclosure must contain at least two disk drives in order to update the firmware on the controller To download RAID controller and NVSRAM firmware in a single operation 1 190 If you are using the EM W go to step 9 If you are using the AM W go to step 2 Perform one of these actions e Select Advanced M aintenance D ownload RAID C ontroller M odule Firmware Select the Support tab and click D ownload Firmware In Select download task select the Download RAID controller module firmware and click OK K NOTE The RAID Controller M odule Firmware area and the NVSRAM area list the current
201. ocated disk groups may not be accessible Planning M D3200 Series Storage Array Terms and Concepts 49 Migrating virtual disks to a storage array with no existing physical disks Turn off the destination storage array when migrating disk groups or a complete set of physical disks from a storage array to another storage array that has no existing physical disks After the destination storage array is turned on and has successfully recognized the newly migrated physical disks migration operations can continue K NOTE Disk groups from multiple storage arrays must not be migrated at the same time to a storage array that has no existing physical disks Enabling premium features before migration Before migrating disk groups and virtual disks enable the required premium features on the destination storage array If a disk group is migrated from a M D 3200 storage array that has a premium feature enabled and the destination array does not have this feature enabled an O ut of C ompliance error message may be generated Disk Roaming You can move physical disks within an array The RAID controller module automatically recognizes the relocated physical disks and logically places them in the proper virtual disks that are part of the disk group Disk roaming is permitted when the RAID controller module is either online or powered off K NOTE The disk group must be exported before moving the physical disks Advanced Features Th
202. oduct 1 If installed remove the front bezel See Removing the Front Bezel on page 202 204 Management Installing Array Components 2 From the Modular Disk Storage M anager MD SM software prepare the drive for removal W ait until the hard drive indicators on the drive carrier signal that the drive can be removed safely For more information see your controller documentation for information about hot swap drive removal If the driveis online the green activity fault indicator flashes as the drive is powered down W hen the drive indicators are off the drive is ready for removal 3 Press the release button to open the drive carrier release handle See Figure 15 4 4 Slide the hard drive out until it is free of the drive bay A CAUTION To maintain proper system cooling all empty hard drive bays must have drive blanks installed 5 Insert a drive blank in the empty drive bay See Installing a Hard Drive Blank on page 204 6 If applicable replace the front bezel See Installing the Front Bezel on page 202 Figure 15 4 Removing and Installing a Hard Drive 1 release button 2 hard drive carrier handle Management Installing ArrayComponents 205 Installing a Hard Drive A CAUTION Many repairs may only be done by a certified service technician A A 206 You must only perform troubleshooting and simple repairs as authorized in your product documentation or as directed by the online or telephone ser
203. odule away from the chassis NOTE To avoid damage to the sensitive EM I contacts on the RAID controller module do not stack RAID controller modules Figure 15 8 Removing and Installing a RAID Controller Module 1 RAID controller module 2 release tab 3 release lever Management Installing ArrayComponents 211 Installing a RAID Controller M odule A CAUTION Many repairs may only be done by a certified service technician You must only perform troubleshooting and simple repairs as authorized in your product documentation or as directed by the online or telephone service and support team Damage due to servicing that is not authorized by Dell is not covered by your warranty Read and follow the safety instructions that came with the product 1 Insert the RAID controller module into the RAID controller module bay until it seats into place 2 Push the release lever toward the chassis until it clicks into place 3 Connect all the cables to the RAID controller module 4 If applicable update the firmware for the RAID controller module For information about the latest firmware see support dell com Opening the RAID Controller Module A CAUTION Many repairs may only be done by a certified service technician You must only perform troubleshooting and simple repairs as authorized in your product documentation or as directed by the online or telephone service and support team Damage due to servicing thatis not authorized by Dell is
204. of the device MD3200 is the model of the device Sdx is the physical path to the owning controller for the device Sdc1 is the physical path to the non owning controller for the device Create a New fdisk Partition ona Multipath Device Node The fdisk command allows you to create partition space for a file system on the newly scanned and mapped virtual disks that are presented to Device M apper To create a partition with the multipathing device nodes dev mapper mpath lt x gt for example use the following command where mpath lt x gt is the multipathing device node on which you want to create the partition fdisk dev mapper mpath lt x gt K NOTE The gt value is an alphanumeric operating system dependent format The corresponding value for mapped virtual disks can be seen using the previously run multipath command Please see your operating system documentation for additional information on fdisk usage Add a New Partition to Device M apper The kpartx command adds the newly fdisk created partition to the Device M apper list of usable partitions See examples below where mpath lt x gt isthe device node on which the partition was created kpartx a dev mapper mpath lt x gt If successful the command does not show an output To verify success and view exact partition naming the user can use these commands to see the full partition names assigned cd dev mapper 1s The following examples provide informat
205. of the tests W hen they finish click OK to close the State C apture dialog Troubleshooting Your Storage Array Software Clicking C ancel stops the state capture process and any remaining tests do not complete Any test information that is generated to that point is saved to the state capture file K NOTE For more information on troubleshooting and recovering from failures see the PowerVault M odular Disk Storage M anager online help topics SM repassist Utility SM repassist replication assistance is a host based utility for W indows platforms This utility is installed with MDSM Use this utility before and after you create a virtual disk copy on a W indows operating system to ensure that all the memory resident data for file systems on the target virtual disk is flushed and that the driver recognizes signatures and file system partitions You can also use this utility to resolve duplicate signature problems for snapshot virtual disks From a command prompt window on a host running Windows navigate to C Program Files D ell M D Storage M anager util and run the following command SMrepassist f lt filesystem identifier gt where f flushes all the memory resident data for the file system indicated by lt filesystem identifier gt and lt filesystem identifier gt specifies a unique file system in the following syntax drive letter lt mount point path gt The file system identifier may consist of only a drive l
206. on or Fixing If however all of the network management connections from the storage management station to the storage array shown in the Tree view are U nresponsive the storage array status is represented as U nresponsive In the EMW Status Bar and the AM W Status Bar the icons also have these behaviors Hold the mouse over the icon in the EM W Status Bar and the AM W Status Bar to display a tooltip with a brief description of the status e Theicons for the Needs Attention status and Unresponsive status is displayed in EMW Status Bar and the AMW Status Bar if there are discovered storage arrays with either condition The EMW Tree view has additional status icons that are shown in the following table Table 18 3 Additional Status Icons Status Icon Description Unsupported Alerts x Setting an alert on as storage array with a Needs with a Needs Upgrade status is not supported In this case the Upgrade Status storage array shows both a Needs U pgrade status and an Unsupported Alerts icon in the Tree view The Unsupported Alerts icon indicates that the storage array cannot be monitored Alert Set va If you installed the Event M onitor with M DSM and if you have set alerts the Alert Set icon is displayed next to the storage array status in the Tree view for which the alerts are set Setting an Alert at x You can set alerts at any of the nodes in the Tree the Parent Node view Setting an alert at a parent node level such
207. on of the command A schedule can be specified when a snapshot virtual disk is first created or it can be added to an existing snapshot virtual disk at any time O ne schedule per snapshot virtual disk is supported Common Reasons for Scheduling a Snapshot Virtual Disk Scheduling a snapshot virtual disk can serve multiple purposes across a data storage environment M ost common uses of a snapshot scheduler are e Data backups e Rapid recovery from a data loss event A scheduled data backup can protect against data loss on a regular unmonitored basis For example if an application stores business critical data on two virtual disks in the storage array you may choose to perform an automatic backup every day To implement this backup select the first virtual disk and create a backup schedule that runs once a day M onday through 140 Configuration Premium Feature Snapshot Virtual Disks Friday at a time between the end of the work day and 11PM Do not select an end date Apply the same schedule to the second virtual disk then map the two snapshot virtual disks to your backup host server and perform your regular backup procedures Remember to unmap the two resulting snapshot virtual disks before the next scheduled snapshot begins If the snapshot virtual disks are not unmapped the storage array does not perform the next scheduled snapshot operation in order to avoid data corruption Scheduled snapshots are also valuable in the even
208. onfiguration Premium Feature Snapshot Virtual Disks 147 The destination of a snapshot repository virtual disk is determined based on the free capacity available in the disk group A snapshot repository virtual disk requires aminimum 8 MB of free capacity You can choose your preferred creation path simple or advanced if the disk group of the source virtual disk has the required amount of free space If 8 MB of free capacity is not available in the disk group of the source virtual disk the Create Snapshot Virtual Disks feature defaults to the advanced path see Creating a Snapshot Virtual Disk Using the Advanced Path on page 146 In the advanced path option you can choose to place the snapshot repository virtual disk in another disk group or you can use unconfigured capacity on the storage array to create a new disk group K NOTE You can create concurrent snapshots of a source virtual disk on both the source disk group and on another disk group Before creating a Snapshot Virtual Disk e The following types of virtual disks are not valid source virtual disks snapshot repository virtual disks snapshot virtual disks target virtual disks that are participating in a virtual disk copy K NOTE Virtual Disk Copy is an Advanced Premium feature e You cannot create a snapshot of a virtual disk that contains unreadable sectors You must satisfy the requirements of your host operating system for creating snapshot virtu
209. onnection is not active 21 Management Provides a 100 1000 M bps Ethernet connection for out of port Ethernet band management of the enclosure connector RAID Controller M odule Additional Features Battery Backup Unit Each RAID controller contains a two cell Lithium ion nanopolymer battery backup unit BBU It provides power to the RAID controller module in the event of a power outage For information on removing and installing the BBU see RAID Controller M odule Backup Battery Unit on page 214 K NOTE For virtual disks the RAID controller firmware changes the data cache 34 setting based on the state of the battery If the battery is missing or does not have sufficient charge the controller flushes the cache and sets the write cache attribute to Write Through for all virtual disks W hen the battery is replaced Write Backis re enabled Planning RAID Controller M odules Storage Array Thermal Shutdown The system automatically shuts down when system temperature exceeds the safe threshold The battery backup unit protects against data loss by providing power to offload cache to non volatile memory in the event of power loss It isnot necessary to shut down any M D 1200 Series expansion enclosures attached to the storage array when thermal shutdown occurs Temperature threshold values determine the temperature at which shutdown occurs T hese thresholds cannot be changed Table 3 1 Shutdown Threshold Type Thr
210. or expected I O patterns are populated in the D ynamic cache read prefetch field and the Segment size field 104 Configuration Disk Groups and Virtual Disks To change the I O type 1 Select from these virtual disk I O characteristic types based on your application needs e File system typical Database e Multimedia e Custom The corresponding dynamic cache read prefetch setting and segment size values that are typically well suited for the selected virtual disk I O characteristic type are populated in the D ynamic cache read prefetch field and the Segment size field K NOTE If you selected the Custom option select your preferred dynamic cache read prefetch setting enabled disabled and segment size 8 KB to 512 KB 2 ClickOK Choosing an Appropriate Physical Disk Type You can create disk groups and virtual disks in the storage array You must select the capacity that you want to allocate for the virtual disk from either unconfigured capacity or free capacity available in the storage array Then you define basic and optional advanced parameters for the virtual disk W ith the advent of different physical disk technologies it is now possible to mix physical disks with different media types and different interface types within a single storage array In this release of MDSM the following media types are supported e Hard physical disk Solid State Disk SSD Configuration Disk Groups and Virtual Disks 105
211. orage array For more information see the PowerVault M odular Disk Storage M anager online help topics After you complete the basic steps for configuring the storage array you can perform these optional tasks M anually define hosts D efine the hosts and the host port identifiers that are connected to the storage array Use this option only if the host is not automatically recognized and shown in the M appings tab Configure ethernet management ports C onfigure the network parameters for the Ethernet management ports on the RAID controller modules if you are managing the storage array by using the out of band management connections View and enable premium features Your MDSM may include premium features View the premium features that are available and the premium features that are already started You can start available premium features that are currently stopped Locating Storage Arrays You can use the Blink option to physically locate and identify a storage array K NOTE If the LEDs from the Blink Storage Array operation do not stop blinking select Stop All Indications to stop the process manually To locate the storage array 1 Select the relevant storage array and e Inthe EM W right click the appropriate storage array and select Blink Storage Array Inthe AMW select the Setup tab click Blink Storage Array e In theAMW select Storage Array Blink Storage Array The LEDs blink on the physical disks
212. ore than one host it is possible that the storage array may become unresponsive to communication over the connections given by one host H owever you may still be able to manage the storage array over the connections provided by another host Recovering From an Unidentified Storage Array To recover from an unidentified storage array 248 1 M ake sure that the network connection to the storage management station is operating M ake sure that the controllers are installed and that the power is turned on to the storage array Correct any existing problems before continuing If you have an in band storage array use the following procedure C lick Refresh after each step to check the results a Make sure that the host context agent software is installed and running If you started the host before the host was connected to the controllers in the storage array the host context agent software is not able to find the controllers If so make sure that the connections are tight and restart the host context agent software Troubleshooting Your Storage Array Software M ake sure that the network can access the host by using the ping command in the following syntax ping lt host name or IP address of the host gt If the network can access the host continue to step c If the network cannot access the host go to step d Remove the host with the unresponsive status from the MD SM and add that host again If the host retur
213. ossible loss of data Source virtual disks that are participating in a virtual disk copy are available for read I O activity only w hile a virtual disk copy has a status of In Progress or Pending Write requests are allowed after the virtual disk copy has completed If the source virtual disk is formatted with a journaling file system any attempt to issue a read request to the source virtual disk may be rejected by the storage array and an error message may be displayed The journaling file system driver issues a write request before it attempts to issue the read request The storage array rejects the write request and the read request may not be issued due to the rejected write request This condition may result in an error message to be displayed which indicates that the source virtual disk is write protected To prevent this issue from occurring do not attempt to access a source virtual disk that is participating in a virtual disk copy while the virtual disk copy has a status of In Progress Also make sure that the Read Only attribute for the target virtual disk is disabled after the virtual disk copy has completed to prevent error messages from being displayed The Virtual Disk Copy premium feature includes e TheCreate Copy Wizard which assists in creating a virtual disk copy e The Copy M anager which monitors virtual disk copies after they are created Before you Begin A virtual disk copy fails all snapshot virtual disks that are assoc
214. ot Virtual Disks 149 10 11 150 Select Virtual D isk gt Snapshot C reate Alternatively you can right click the source virtual disk and select C reate Snapshot Virtual D isk from the pop up menu The C reate Snapshot Virtual D isk Wizard Introduction dialog is displayed Select Advanced and click Next The Specify Names window is displayed Enter the Snapshot visual disk name and the Snapshot repository virtual disk name and click Next The Allocate C apacity window is displayed In the C apacity allocation area select e Free capacity on same disk group as base recommended e Free capacity on different disk group Unconfigured capacity create new disk group Enter the snapshot repository virtual disks capacity as a percentage of the source virtual disks capacity and click Next The Specify Virtual D isk Parameters window is displayed In the Snapshot virtual disk parameters area select the relevant mapping option you can select Automatic e Map later In the Snapshot repository virtual disk parameters area enter the system behavior when e The snapshot repository virtual disk is full to the selected percentage level e The snapshot repository virtual disk is full Click Next T he Preview window containing the summary of the snapshot virtual disk is displayed Click Finish The C ompleted window is displayed Configuration Premium Feature Snapshot Virtual Disks 12 Click
215. ot virtual disk it automatically creates a snapshot repository virtual disk A snapshot repository is a virtual disk created in the storage array as a resource for a snapshot virtual disk A snapshot repository virtual disk contains snapshot virtual disk metadata and copy on write data for a particular snapshot virtual disk The repository supports one snapshot only You cannot select a snapshot repository virtual disk as a source virtual disk or as a target virtual disk in a virtual disk copy If you select a snapshot source virtual disk as the target virtual disk of a virtual disk copy you must disable all snapshot virtual disks associated with the source virtual disk A CAUTION Before using the Snapshot Virtual Disks Premium Feature in a Window s Clustered configuration you must map the snapshot virtual disk to the cluster node that ow ns the source virtual disk This ensures that the cluster nodes correctly recognize the snapshot virtual disk A CAUTION Mapping the snapshot virtual disk to the node that does not own the source virtual disk before the snapshot enabling process is completed can result in the operating system incorrectly identifying the snapshot virtual disk This can resultin data loss or an inaccessible snapshot For more information on mapping the snapshot virtual disk to the secondary node see the D ell PowerVault M D 3200 and M D 3220 Storage Arrays With Microsoft Windows Server Failover C lusters on dell com support ma
216. ot virtual disk when the snapshot repository virtual disk becomes full Host to Virtual Disk M apping C hoose whether to map the snapshot virtual disk to ahost or host group now or to map the snapshot virtual disk later The default setting is M ap later Schedule C reates the snapshot virtual disk at a specified time or according to a regularly occurring interval If no schedule is specified the snapshot operation begins immediately T his parameter can also be used to apply a schedule to an existing snapshot virtual disk Preparing Host Servers to Create the Snapshot Using the Advanced Path K K K NOTE Before using the Snapshot Virtual Disks Premium Feature in a M icrosoft Windows clustered configuration you must first map the snapshot virtual disk to the cluster node that owns the source virtual disk This ensures that the cluster nodes correctly recognize the snapshot virtual disk NOTE M apping the snapshot virtual disk to the node that does not own the source virtual disk before the Snapshot enabling process is completed can resultin the operating system mis identifying the snapshot virtual disk This in turn can result in data loss on the source virtual disk or an inaccessible snapshot NOTE For more information on mapping the snapshot virtual disk to the secondary node see the Dell PowerVault M D3200 and M D3220 Storage Arrays With M icrosoft Windows Server Failover Clusters at dell com support manuals C
217. outside of the local subnet This process requires specific identification information to manually add a storage array To add a storage array that uses out of band management specify the host name or management port IP address of each controller in the storage array Before using this option verify that the applicable network configuration tasks are performed To add an in band storage array add the host through which the storage array is attached to the network K NOTE It can take several minutes for M DSM to connect to the specified storage array To add a storage array manually 1 Select Edit Add Storage Array 2 Select the relevant management method Out of band management Enter a host name or an IP address for the RAID controller M odules in the storage array in band management Enter a name or an IP address for the H ost through which the storage array is attached to the network Configuration About Your Storage Array 67 K NOTE The host agent must be restarted before in band management communication can be established See Starting or Restarting the Host Context Agent Software on page 251 3 Click Add 4 Useoneof these methods to name a storage array e Inthe EM W select the Setup tab and select Name Rename Storage Arrays Inthe AMW select the Setup tab and select Rename Storage Array e Inthe EMW right click the icon corresponding to the array and select Rename Setting Up You
218. ower supply cooling fan 2 RAID Controller M odule 0 module 3 RAID Controller Module 1 4 600W power supply cooling fan module Planning About Your Storage Array 27 Hard Drive Indicator Patterns Figure 2 5 Hard Drive Indicators im 1 hard drive activity indicator green 2 hard drive status indicator green and amber 28 Planning About Your Storage Array Drive Status Indicator Pattern Condition Off The physical disk is not yet discovered by the host server is spun down for removal not supported for the RAID controller module or is not in the physical disk slot NOTE The drive status indicator remains off until all hard drives are initialized after system power is turned on Drives are not ready for insertion or removal during this time Steady green Physical disk is online Green flashing On 250 ms Off 250 ms Physical disk is being identified Green flashing On 400 ms Off 100 ms Physical disk rebuilding Amber flashing On 150 ms Off 150 ms Physical disk failed Flashing green amber and Off green On Physical disk failure predicted SM ART 500 ms amber On 500 ms Off 1000 ms Flashing green amber and Off green 3 Physical disk rebuild aborted seconds amber 3 seconds and Off 3 seconds Power Supply and Cooling Fan Features The M D 3200 Series storage array includes two integrated hot swappable power supply cooling fan modules Both modules must be installed to ensure p
219. ownership of a standard virtual disk or a snapshot repository virtual disk You cannot directly change the RAID controller module ownership of a snapshot virtual disk because the snapshot virtual disk inherits the RAID controller module owner of its associated source virtual disk Changing the RAID controller module ownership of a virtual disk changes the preferred RAID controller module ownership of the virtual disk During a virtual disk copy the same RAID controller module must own both the source virtual disk and the target virtual disk Sometimes both virtual disks do not have the same preferred RAID controller module when the virtual disk copy starts Therefore the ownership of the target virtual disk is automatically transferred to the preferred RAID controller module of the source virtual disk W hen the virtual disk copy is completed or is stopped ownership of the target virtual disk is restored to its preferred RAID controller module If ownership of the source virtual disk is changed during the virtual disk copy ownership of the target virtual disk is also changed Under certain operating system environments it may be necessary to reconfigure the multi path driver before an I O path can be used To change the ownership of the virtual disk to the connected controller 1 Inthe AMW select the Logical tab and select a virtual disk 2 Select Virtual D isk gt C hange O wnership Preferred Path 3 Select the appropriate RAID controlle
220. p You stop and then restart SM agent after e Moving a controller offline or replacing a controller e Removing host to array connections from or attaching host to array connections to a Linux host server Windows To start or stop the host context agent 1 Click Start Settings C ontrol Panel Administrative Tools Services or Click Start Administrative Tools Services 2 From the list of services select M odular Disk Storage M anager Agent Configuration About Your Host 91 3 If the host context agent is running click Action Stop then wait approximately 5 seconds 4 Click Action Start I O Data Path Protection You can have multiple host to array connections for a host Ensure that you select all the connections to the array when configuring host access to the storage array K NOTE See the Deployment Guide for more information on cabling configurations K NOTE For maximum redundancy you must select all host connections to the array when manually defining host topology For example a host may have two host connections listed when manually configuring host access For this host you would select the two host connections listed in the Available hosts section and add them to the Selected hosts section using the Add button K NOTE For more information on configuring hosts see Configuration About Your Host on page 85 If a component such asa RAID controller module or a cable fails or an error occurs o
221. peration can be temporarily suspended by disabling the schedule W hen a schedule is disabled the schedule timer continues to run but any scheduled snapshot operation do not occur Scheduled Snapshot Icons Scheduled snapshots are displayed in the AM W using the following icons Icon Description The schedule is enabled Scheduled snapshots occurs The schedule is disabled Scheduled snapshots do not occur a For more information on scheduling snapshots virtual disks see the PowerVault M odular Disk Storage M anager online help topics and the C LI Guide Creating a Snapshot Virtual Disk Using the Simple Path You can choose the simple path to create a snapshot virtual disk if the disk group of the source virtual disk has the required amount of free space A snapshot repository virtual disk requires a minimum 8 MB of free capacity The destination of a snapshot repository virtual disk is determined based on the free capacity available in the disk group If 8 MB of free capacity is not available in the disk group of the source virtual disk the C reate Snapshot Virtual Disks feature defaults to the advanced path For more information see C reating a Snapshot Virtual Disk Using the Advanced Path on page 146 In the advanced path option you can choose to place the snapshot repository virtual disk in another disk group or you can use unconfigured capacity on the storage array to create a new disk group 142 Configuration Pre
222. pied data is not is not updated properly Follow any additional instructions for your operating system Failure to follow these additional instructions can create unusable virtual disk copies K NOTE If your operating system requires additional instructions you can find those instructions in your operating system documentation Re Copying a Virtual Disk You can use the C opy M anager to create a new virtual disk copy for a selected source virtual disk and a target virtual disk Use this option when you have stopped a virtual disk copy and want to start it again or when a virtual disk copy has failed or completed T he virtual disk copy starts over from the beginning Possible loss of data T he re copying operation overwrites existing data on the target virtual disk Possible loss of data access W hile a virtual disk copy has a status of In Progress or Pending source virtual disks are available for read 1 0 activity only W rite requests are allowed after the virtual disk copy has completed Keep these guidelines in mind when re copying a virtual disk If hosts are mapped to the source virtual disk the data that is copied to the target virtual disk when you perform the re copy operation may have changed since the previous virtual disk copy was created Select only one virtual disk copy in the C opy M anager dialog To re copy the virtual disk 1 2 Stop all I O to the source virtual disk and the target virtual disk
223. point in time image of a virtual disk in a storage array It is not an actual virtual disk containing a copy of the original data It is a reference to the data that was contained on a virtual disk at a specific time A snapshot virtual disk isthe logical equivalent of a complete physical copy H owever you can create a snapshot virtual disk much faster than a physical copy using less disk space The virtual disk on which the snapshot is based called the source virtual disk must be a standard virtual disk in your storage array Typically you create a snapshot so that an application such as a backup application can access the snapshot and read the data while the source virtual disk remains online and accessible NOTE No I O requests are permitted on the source virtual disk while the virtual disk snapshot is being created A snapshot repository virtual disk containing metadata and copy on write data is automatically created when a snapshot virtual disk is created The only data stored in the snapshot repository virtual disk is that which has changed since the time of the snapshot After the snapshot repository virtual disk is created 1 0 write requests to the source virtual disk resume Before a data block on the source virtual disk is modified the contents of the block to be modified are copied to the snapshot repository virtual disk for safekeeping Because the snapshot repository virtual disk stores copies of the original data in tho
224. protection for a disk group depends on the location of the physical disks that comprise the disk group To make sure that enclosure loss protection is not affected you must replace a failed physical disk to initiate the copyback process See Enclosure L oss Protection on page 117 CAUTION If a hot spare physical disk does not have Optimal status follow the Recovery Guru procedures to correct the problem before you try to unassign the physical disk You cannot assign a hot spare physical disk if itis in use taking over for a failed physical disk To assign or unassign hot spare physical disks 1 2 3 114 In the AM W select the Physical tab Select one or more physical disks Perform one of these actions e Select Physical disk gt H ot Spare C overage Configuration Disk Groups and Virtual Disks 10 11 12 e Right click the physical disk and select H ot Spare C overage from the pop up menu The Hot Spare Physical D isk O ptions window is displayed Select the appropriate option you can select View change current hot spare coverage to review hot spare coverage and to assign or unassign hot spare physical disks if necessary See step 5 e Automatically assign physical disks to create hot spare physical disks automatically for the best hot spare coverage using available physical disks e Manually assign individual physical disks to create hot spare physical disks out of the selected physical
225. ps e Thenumber of snapshot virtual disks that can be created using a single snapshot set varies with the I O load on the RAID controller modules Under little or no I O load the number of virtual disks in a snapshot set must be limited to 16 Under high I O loads the limit is 3 e Thesnapshot virtual disks created in the storage management software are differential snapshots Plex snapshots are not supported e Virtual disks to be used as source virtual disks for VSS snapshots must have names no longer than 16 characters The VSS hardware provider uses the source virtual disk name as a prefix for the snapshot and repository virtual disk names T he resulting snapshot and repository names are too long if the source virtual disk name exceeds 16 characters K NOTE A volume is another term for virtual disk For more information on VDS and VSS see microsoft com 228 Management System Interfaces Troubleshooting Your Storage Array Software Start Up Routine Look and listen during the array s start up routine for the indications described in Table 18 1 For a description of the front and back panel indicators see Planning About Your Storage Array on page 23 Table 18 1 Start Up Routine Indications Look Listen for Action Alert messages See your storage management documentation An unfamiliar constant scraping or grinding See Getting Help on page 265 sound when you access a physical disk K NOTE At le
226. r Storage Array A list of initial setup tasks is displayed on the Setup tab in the AM W The list of initial setup tasks shows you how to set up a storage array Using the steps outlined in the Initial Setup Tasks Area ensures that the basic setup steps are completed properly Use the Initial Setup Tasks list the first time that you set up a storage array to perform these tasks 68 Locate the storage array Find the physical location of the storage array on your network by turning on the unit identify LEDs T he storage array can be identified with a label Give a new name to the storage array Use a unique name that identifies each storage array Set a storage array password C onfigure the storage array with a password to protect it from unauthorized access MDSM prompts for the password when an attempt is made to change the storage array configuration such as when a virtual disk is created or deleted Configure the storage array C reate disk groups virtual disks and hot spare physical disks by using the Automatic configuration method or the M anual configuration method For more information see the PowerVault M odular Disk Storage M anager online help topics Map Virtual Disks M ap virtual disks to hosts or host groups Configuration About Your Storage Array Save C onfiguration Save the configuration parameters in a file that you can use to restore the configuration or reuse the configuration on another st
227. r module slot and click Yes to confirm the selection Removing Host to Virtual Disk Mapping To remove the host to virtual disk mapping 1 Inthe AMW select the M apping tab 2 Select a virtual disk from the D efined M appings pane 122 Configuration Disk Groups and Virtual Disks 3 Perform one of these actions Select M appings gt Remove e Right click the virtual disk and select Remove M apping from the pop up menu 4 Click Yes to remove the mapping Changing the RAID Controller Module Ownership of a Disk Group You can change the RAID controller module ownership of aa disk group You can change the RAID controller module ownership of a standard virtual disk or a snapshot repository virtual disk You cannot directly change the RAID controller module ownership of a snapshot virtual disk because the snapshot virtual disk inherits the RAID controller module owner of its associated source virtual disk Changing the RAID controller module ownership of a virtual disk changes the preferred RAID controller module ownership of the virtual disk During a virtual disk copy the same RAID controller module must own both the source virtual disk and the target virtual disk Sometimes both virtual disks do not have the same preferred RAID controller module when the virtual disk copy starts Therefore the ownership of the target virtual disk is automatically transferred to the preferred RAID controller module of the source virtual disk W hen
228. rage M anager online help topics 196 M anagement Firmware Downloads Dow nloading M D1200 Series Expansion Module EMM Firmware K NOTE Due to a limitation with Linux expansion enclosure EMM firmware updates must be performed using out of band management only Failure to do so may result in the host server becoming unresponsive and it may require a reboot You can transfer a downloadable firmware file to the expansion enclosure EMM in the expansion enclosures attached to the storage array A A CAUTION Risk of possible loss of data or risk of damage to the storage array Dow nloading the expansion enclosure EMM firmware incorrectly could result in loss of data or damage to the storage array Perform downloads only under the guidance of your Technical Support representative CAUTION Risk of making expansion enclosure EMM unusable Do not make any configuration changes to the storage array while downloading expansion enclosure EM M firmware Doing so could cause the firmw are download to fail and make the selected expansion enclosure unusable Perform one of these actions inthe AMW select Advanced M aintenance gt Download E M M Firmware Select the Support tab and click D ownload Firmware In the dialog that is displayed select the E M M firmware and click OK The Download E nvironmental E M M Firmware dialog is displayed In the Select enclosures area either select each expansion enclosure to
229. rage partitioning topology is the collection of elements such as D efault Group host groups hosts and host ports shown as nodes in the Topology pane of the M appings tab in the AM W For more information see Using the M appings Tab on page 86 If a storage partitioning topology is not defined an informational dialog is displayed each time you select the M appingstab You must define the storage partitioning topology before you define the actual storage partition Disk Group and Virtual Disk Expansion Adding free capacity to a disk group is achieved by adding unconfigured capacity on the array to the disk group D ata is accessible on disk groups virtual disks and physical disks throughout the entire modification operation The additional free capacity can then be used to perform a virtual disk expansion on a standard or snapshot repository virtual disk Disk Group Expansion To add free capacity to a disk group 1 IntheAMW select the Logical tab 2 Select a disk group 3 Select Disk G roup Add Free C apacity Physical Disks The Add Free C apacity window is displayed Based on the RAID level and the enclosure loss protection of the current disk group a list of unassigned physical disks is displayed Configuration Disk Groups and Virtual Disks 131 K NOTE If the RAID level of the disk group is RAID level 5 or RAID level 6 and the expansion enclosure has enclosure loss protection Display only physical disks that ensur
230. ray is still unresponsive Troubleshooting Your Storage Array Software 241 To recover from an unresponsive storage array 1 10 11 242 Check the Tree View in the EM W to see if all storage arrays are unresponsive If any storage arrays are unresponsive check the storage management station network connection to make sure that it can reach the network Ensure that the RAID controller modules are installed and that there is power to the storage array If there a problem with the storage array correct the problem Perform one of these actions depending on how your storage array is managed e Out of band managed storage array Go to step 6 n band managed storage array Go to step 12 For an out of band managed storage array ensure that the RAID controller modules are network accessible by using the ping command to make sure that the RAID controller module can be reached Type one of these commands and press lt Enter gt ping lt host name gt e ping lt RAID controller module I P address gt If the verification is successful see step 8 if not see step 9 Remove the storage array with the Unresponsive status from the EM W and select Add Storage Array to add the storage array again If the storage array does not return to Optimal status check the Ethernet cables to make sure that there is no visible damage and that they are securely connected M ake sure the appropriate network configuration t
231. re 15 9 Connect all the cables to the array Turn on the array and the host server Management Installing ArrayComponents 213 RAID Controller Module Backup Battery Unit Removing the RAID Controller Module Backup Battery Unit A CAUTION Many repairs may only be done by a certified service technician You must only perform troubleshooting and simple repairs as authorized in your product documentation or as directed by the online or telephone service and support team Damage due to servicing thatis not authorized by Dell is not covered by your warranty Read and follow the safety instructions that came with the product 1 Turn off the array and host server 2 Disconnect all the cables connected to the array 3 Remove the RAID controller module See Removing a RAID Controller Module on page 211 4 Open theRAID controller module See O pening the RAID Controller Module on page 212 5 Loosen the screw that secures the backup battery unit to the RAID controller module See Figure 15 10 6 Slide the backup battery unit in the direction of the arrow and lift it out of the RAID controller module See Figure 15 10 Figure 15 10 Removing and Installing the RAID Controller Module Backup Battery Unit 1 backup battery unit 2 screw 214 Management Installing Array Components Installing the RAID Controller M odule Backup Battery Unit A CAUTION Many repairs may only be done by a certified service technician You must on
232. recoverable ECC memory or PCI errors or critical physical conditions can cause lockdown If your RAID storage array is configured for redundant access and cache mirroring the surviving controller can normally recover without data loss or shutdown Typical hard controller failures are detailed in the following sections Troubleshooting YourArray 261 Invalid Storage Array The RAID controller module is supported only in a Dell supported storage array U pon installation in the storage array the controller performs a set of validation checks The array status LED is lit with a steady amber color while the RAID controller module completes these initial tests and the controllers are booted successfully If the RAID controller module detects a non Dell supported storage array the controller aborts startup The RAID controller module does not generate any events to alert you in the event of an invalid array but the array status LED is lit with a flashing amber color to indicate a fault state For full details on the LEDsand their interpretation see Back Panel Features and Indicators on page 27 ECC Errors RAID controller firmware can detect ECC errors and can recover from a single bit ECC error whether the RAID controller module is in a redundant or nonredundant configuration A storage array with redundant controllers can recover from multi bit ECC errors as well because the peer RAID controller module can take over if necessary T
233. rent tab If you want to search for the C term in other tabs select the tab and click the Find button again Click the Find button again to search for additional occurrences of the term 5 To save the storage array profile a b c Click Save As To save all sections of the storage array profile select the All sections To save information from particular sections of the storage array profile select the Select sections and select the check boxes corresponding to the sections that you want to save Select an appropriate directory In File Name type the file name of your choice To associate the file with a particular software application that is displayed it specify a file extension such as txt NOTE The file is saved as ASCII text f Click Save 6 To exit the storage array profile click C lose For more information see the PowerVault M odular Disk Storage M anager online help topics Troubleshooting Your Storage Array Software 237 Viewing the Logical Associations You can use the Associated Logical Elements option to view the logical associations among different virtual disks in a storage array To view the associations for source virtual disks snapshot virtual disks and snapshot repository virtual disks 1 Inthe AMW select the Logical tab or in the Topology pane of the M appings tab 2 Select View Associated Logical Elements Alternatively you can right click the virtual disk to open
234. rictions Before you perform any virtual disk copy tasks understand and adhere to the restrictions listed in this section T he restrictions apply to the source virtual disk the target virtual disk and the storage array W hile a virtual disk copy has a status of In Progress Pending or Failed the source virtual disk is available for read I O activity only After the virtual disk copy is complete read and write 1 0 activity to the source virtual disk are permitted A virtual disk can be selected as a target virtual disk for only one virtual disk copy at atime A virtual disk copy for any virtual disk cannot be mounted on the same host as the source virtual disk W indows does not allow a drive letter to be assigned to a virtual disk copy A virtual disk with a Failed status cannot be used as a source virtual disk or target virtual disk A virtual disk with a D egraded status cannot be used as a target virtual disk A virtual disk participating in a modification operation cannot be selected as a source virtual disk or target virtual disk M odification operations include the following Capacity expansion RAID level migration Segment sizing Virtual disk expansion Defragmenting a virtual disk NOTE The following host preparation sections also apply when using the virtual disk copy feature through the CLI interface Configuration Premium Feature Virtual DiskCopy 167 Creating a Virtual Disk Copy A CAUTION P
235. rmation for each block A consistency check compares data blocks on RAID level 1 mirrored physical disks RAID level 0 virtual disks have no data consistency Click OK Suspending the Media Scan You cannot perform a media scan while performing another long running operation on the disk drive such as reconstruction copy back reconfiguration virtual disk initialization or immediate availability formatting If you want to perform another long running operation you must suspend the media scan K NOTE A background media scan is the lowest priority of the long running operations To suspend a media scan 1 2 In the AM W select the Logical tab and select any virtual disk Select Virtual D isk gt C hange M edia Scan Settings The C hange M edia Scan Settings window is displayed Select Suspend media scan K NOTE This applies to all the virtual disks on the disk group Click OK Configuration Disk Groups and Virtual Disks 137 138 Configuration Disk Groups and Virtual Disks Configuration Premium Feature Snapshot Virtual Disks K NOTE If you ordered this feature you received a Premium Feature Activation card shipped in the same box as your Dell PowerVault M D storage array Follow the directions on the card to obtain a key file and to enable the feature NOTE The snapshot feature allows up to 16 snapshots per LUN and 256 per array to be present at the same time A snapshot virtual disk is a
236. roper cooling The system requires at least one of the cooling fans to function to avoid overheating A power supply cooling fan module can be replaced without powering down the system For information on removing and installing the modules see Power Supply C ooling Fan M odule on page 216 VAN CAUTION A power supply cooling fan module can be removed from a pow ered on enclosure for a maximum period of 5 minutes Beyond that time the system may automatically shut down to prevent damage Planning About Your Storage Array 29 Power Indicator Codes and Features Figure 2 6 Power Indicator Codes and Feature _ i Item LED Type Icon Description 1 DC power TheLED lights green when the DC output voltage is within the limit If this LED is off it indicates that the DC output voltage are not within the limit 2 Power supply cooling A TheLED lights amber when the DC output fan fault voltage is not within the limit or a fault with the fan is detected If thisLED is off it indicates that no fault condition is present 3 AC power RI The LED lights green when the AC input voltage iswithin the limit If this LED is off it indicates either there is no power or the AC input voltage is not within the limit 4 Power connector Connect the external power supply to this connector 5 Power switches 2 The power switch controls the power supply output to the enclosure 30 Planning Abo
237. rror D ata could not be read and parity or redundancy information could not be used to regenerate the data For example redundancy information cannot be used to reconstruct the data on a degraded virtual disk The error is reported to the event log For more information see the PowerVault M odular Disk Storage M anager online help topics Changing M edia Scan Settings To change the media scan settings 1 Inthe AMW select the Logical tab and select any virtual disk 2 Select Virtual Disk gt C hange M edia Scan Settings The C hange M edia Scan Settings window is displayed 3 Deselect Suspend media scan if selected 4 In Scan duration enter or select the duration in days for the media scan 136 Configuration Disk Groups and Virtual Disks 8 The media scan duration specifies the number of days for which the media scan runs on the selected virtual disks To disable media scans on an individual virtual disk select the virtual disk in the Select virtual disks to scan area and deselect Scan selected virtual disks To enable media scans on an individual virtual disk select the virtual disk in the Select virtual disks to scan area and select Scan selected virtual disks To enable or disable the consistency check select either With consistency check or Without consistency check K NOTE A consistency check scans the data blocks in a RAID level 5 virtual disk or a RAID level 6 virtual disk and checks the consistency info
238. rt devices These device nodes must never be accessed mounted or used in any way Doing so could cause loss of communication to the storage array and possibly cause serious damage to the storage array potential making data stored on the array inaccessible Only multipathing device nodes and partition nodes created using the directions provided above must be mounted or in any way accessed by the host system or its users Configuration Device Mapper Multipath for Linux 185 Table 13 1 Device Mapper Commands Command Descriptions multipath h Prints usage information multipath Il Displays the current multipath topology using all available information sysfs the device mapper path checkers and so on multipath Re aggregates multipathing device with simplified output multipath f Flushes out D evice M apper for the specified lt multipath_dev_node gt multipath F rescan_dm_devs multipathing device Used if the underlying physical devices are deleted unmapped Flushes out all unused multipathing device maps Dell provided script Forces a rescan of the host s SCSI bus and aggregates multi pathing devices as needed For use when e LUNsare dynamically mapped to the hosts e New targets are added to the host e Failback of the storage array is required 186 Configuration Device Mapper Multipath for Linux Limitations and Known Issues In certain error conditions with the no_path_retry or the queue _
239. rtual disk has a status of Optimal or Disabled by clicking the Summary tab and then clicking Disk Groups amp Virtual Disks 4 Follow any additional instructions for your operating system Failure to follow these additional instructions can create unusable snapshot virtual disks K NOTE If your operating system requires additional instructions you can find those instructions in your operating system documentation After your host server is prepared see C reating a Snapshot Virtual Disk Using the Advanced Path on page 146 to create the snapshot using the advanced path If you want to use a snapshot regularly such as for backups use the Disable Snapshot and Re create Snapshot options to reuse the snapshot Disabling and re creating snapshots preserves the existing virtual disk to host mappings to the snapshot virtual disk Creating the Snapshot Using the Advanced Path K NOTE Removing the drive letter of the associated virtual disk in Windows or unmounting the virtual drive in Linux helps to guarantee a stable copy of the drive for the Snapshot After first preparing the host server s as specified in the preceding procedure complete the following steps to create a virtual disk snapshot using the advanced path 1 Stop the host application accessing the source virtual disk and unmount the source virtual disk 2 IntheAMW select the Logical tab select a valid source virtual disk Configuration Premium Feature Snapsh
240. rview Inheriting the System Settings Use the Inherit System Settings option to import the operating system theme settings into the MD SM Importing system theme settings affects features like font type font size color and contrast inthe MDSM 1 Open the Inherit System Settings window in one of these ways e Select Tools Inherit System Settings e Select the Setup tab and click Inherit System Settings 2 Select Inherit system settings for color and font 3 Click OK Array Management Window You can launch the AMW from the EM W The AMW provides management functions for a single storage array You can have multiple AM W s open simultaneously to manage different storage arrays To launch the AMW 1 IntheEM W on the Devicestab double click on the relevant storage array The context menu for the selected storage is displayed 2 In the context menu select M anage Storage Array The AMW for the selected storage is displayed The AM W has the following tabs Summary tab You can view the following information about the storage array e Status e Hardware components e Capacity e Hosts and M appings Storage partitions e Disk groups and virtual disks e Logical tab You can view the organization of the storage array by virtual disks disk groups free capacity nodes and any unconfigured capacity for the storage array Configuration Overview 63 Physical tab You can view the organization of the storage array b
241. ry 225 226 Management Firmware Inventory Management System Interfaces Microsoft Services Virtual Disk Service The M icrosoft Virtual Disk Service VDS is a component of the W indows operating system The VDS component utilizes third party vendor specific software modules known as providers to access and configure third party storage resources such as M D 3200i storage arrays The VD S component exposes a set of application programming interfaces APIs that provides a single interface for managing disks and other storage hardware T he M D 3200i Series VDS Provider enables W indows tools including the Disk M anager to access and configure storage array virtual disks TheVDS Provider for the M D 3200i Series arrays is available on the M D 3200i Series resource media For more information on VDS see microsoft com Volume Shadow Copy Service The Microsoft Volume Shadow copy Service VSS is a component of the Microsoft W indows operating system The VSS component utilizes third part vendor specific software modules known as providers to access and utilize snapshot and disk copy functionality provided by third party storage resources such as M D 3200 Series storage arrays The combination of the VSS component and the VSS Provider included on the M D 3200 Resource media enable the M D 3200 Series arrays to be utilized by third party and W indows backup and snapshot applications K NOTE Virtual disks that is used as so
242. s 30 The hosts attached to the storage array read and write data to the virtual disks K NOTE Before you can create virtual disks you must first organize the physical disks into disk groups and configure host access Then you can create virtual disks within a disk group To create a virtual disk use one of the following methods e Create a new disk group from unconfigured capacity You first define the RAID level and free capacity available storage space for the disk group and then you define the parameters for the first virtual disk in the new disk group e Create a new virtual disk in the free capacity of an existing disk group You only need to specify the parameters for the new virtual disk A disk group has a set amount of free capacity that is configured when the disk group is created You can use that free capacity to subdivide the disk group into one or more virtual disks You can create disk groups and virtual disks using e Automatic configuration Provides the fastest method but with limited configuration options e Manual configuration Provides more configuration options W hen creating a virtual disk consider the uses for that virtual disk and select an appropriate capacity for those uses For example if a disk group has a virtual disk that stores multimedia files which tend to be large and another virtual disk that stores text files which tend to be small the multimedia file virtual disk requires more capa
243. s Cumulative 10 s per second from last start time Read Percentage Percentage of cumulative O s that are READs Cache Hit Percentage Percentage of cumulative 10 s that are in cache Current KB second Snapshot of throughput value per second 1KB 1024 bytes Maximum KB second Maximum recorded throughput value from last start time Current 10 second Snapshot of 1O s per second IOP Input output per second or one completed I O transaction Maximum O second M aximum recorded IOP from last start time For more information see the online help topics Planning M D3200 Series Storage Array Terms and Concepts 59 60 Planning M D3200 Series Storage Array Terms and Concepts Configuration Overview Dell PowerVault M odular Disk Storage M anager M DSM online help contains information on the how to use the MDSM application to perform the configuration and management tasks described in this document You can access online help by selecting H elp located at the top right corner of M D SM interface For information on installing the MDSM see the M D 3200 and M D 3220 Storage Array s D eployment Guide at dell com support manuals K NOTE MDSM supports M D3000 and M D3200 storage arrays and can automatically detect both these storage arrays User Interface The Storage M anager screen is divided into two primary windows e Enterprise M anagement W indow EM W The EMW provides high level management of the storage
244. s as authorized in your product documentation or as directed by the online or telephone service and support team Damage due to servicing that is not authorized by Dell is not covered by your warranty Read and follow the safety instructions that came with the product 1 Slide the power supply cooling fan module into the chassis until it is fully seated and the release tab clicks into place See Figure 15 11 Management Installing ArrayComponents 217 2 Connect the power cable to the power supply cooling fan module and plug the cable into a power outlet 3 Secure the power cable using the strap See Figure 15 12 Figure 15 12 Securing the Power Cable 1 strap NOTE If the array is powered on all the power supply LEDs remain off until the AC power cable is connected to the power supply cooling fan module and the power switch is turned on 4 Turn on the power supply cooling fan module VAN CAUTION When connecting the pow er cable secure the cable with the strap Control Panel Removing the Control Panel 1 Turn off the array and host server 2 Disconnect all the power cables connected to the array 218 Management Installing Array Components 3 Remove the hard drives from slots 0 to 2 in PowerVault M D 3200 slots 0 to 5 in PowerVault M D 3220 See Removing a Hard Drive on page 204 K NOTE Mark each hard drive with it s slot position as you remove it 4 Slide the control panel out of the chassis after
245. s exists K You do not need the snapshot now You intend to re create the snapshot at a later time and want to retain the associated snapshot repository virtual disk so that you do not need to create it again You want to maximize storage array performance by stopping copy on write activity to the snapshot repository virtual disk NOTE If you do not intend to re create the snapshot virtual disk at a later time in the Logical pane select the snapshot virtual disk and select Virtual Disk Delete to remove it The associated snapshot repository virtual disk is also removed For more information on removing a snapshot virtual disk see the PowerVault M odular Disk Storage M anager online help topics NOTE The SM devices utility displays the snapshot virtual disk in its output even after the snapshot virtual disk is disabled To disable a snapshot virtual disk 1 In the AM W select the Logical tab select the snapshot virtual disk and select Virtual D isk gt Snapshot Disable In the text box type yes and click OK The snapshot virtual disk is disabled The associated snapshot repository virtual disk does not change status T he copy on write activity to the snapshot repository virtual disk stops until the snapshot virtual disk is re created Configuration Premium Feature Snapshot Virtual Disks 155 Preparing Host Servers to Re create a Snapshot Virtual Disk EZ K NOTE Before you create a new s
246. s where typical I O size is small and there is a high proportion of read activity such as file application database web e mail news and intranet servers RAID 6 RAID 6 issimilar to RAID 5 but provides an additional parity disk for better redundancy This is the most versatile RAID level and is suited for multi user environments where typical I O size is small and there is a high proportion of read activity RAID 6 is recommended when large size physical disks are used or large number of physical disks are used in a disk group RAID 10 RAID 10 a combination of RAID 1 and RAID 0O uses disk striping across mirrored disks It provides high data throughput and complete data redundancy Utilizing an even number of physical disks four or more creates aRAID level 10 disk group and or virtual disk Because RAID levels 1 and 10 use disk mirroring half of the capacity of the physical disks is utilized for mirroring T his leaves the remaining half of the physical disk capacity for actual storage RAID 10 is automatically used when a RAID level of 1 is chosen with four or more physical disks RAID 10 works well for medium sized databases or any environment that requires high performance and fault tolerance and moderate to medium capacity 42 Planning M D3200 Series Storage Array Terms and Concepts Segment Size Disk striping enables data to be written across multiple physical disks Disk striping enhances performance because striped dis
247. se data blocks further changes to those data blocks write only to the source virtual disk The snapshot Configuration Premium Feature Snapshot Virtual Disks 139 repository uses less disk space than a full physical copy because the only data blocks that are stored in the snapshot repository virtual disk are those that have changed since the time of the snapshot W hen you create a snapshot virtual disk specify its location capacity schedule and other parameters You can disable or delete the snapshot virtual disk when it is not required If you disable a snapshot virtual disk you can re create and reuse it the next time you perform a backup For more information see Re creating Snapshot Virtual Disks on page 157 If you delete a snapshot virtual disk you also delete the associated snapshot repository virtual disk K NOTE Deleting a snapshot does not affect data on the source virtual disk K NOTE The following host preparation sections also apply when using the snapshot feature through the CLI interface Scheduling a Snapshot Virtual Disk W hen you create a snapshot virtual disk you can choose whether the snapshot is created immediately or is created according to a schedule that you determine T his schedule can be a one time snapshot creation or an ongoing snapshot creation that occurs at regularly occurring intervals If a schedule is not specified the snapshot virtual disk creation happens immediately upon executi
248. sk M onitor storage array performance Configuration Overview Configuration About Your Storage Array Out of Band and In Band M anagement You can manage a storage array in two ways e Qut of band management e in band management Out of Band M anagement Using the out of band management method data is separate from commands and events D ata travels through the host to controller interface while commands and events travel through the management port Ethernet cables This management method lets you configure the maximum number of virtual disks that are supported by your operating system and host adapters A maximum of eight storage management stations can concurrently monitor an out of band managed storage array This limit does not apply to systems that manage the storage array through the in band management method W hen you use out of band management you must set the network configuration for each RAID controller module s management Ethernet port This includes the Internet Protocol IP address subnetwork mask subnet mask and gateway If you are using a D ynamic Host Configuration Protocol DHCP server you can enable automatic network configuration but if you are not using a DHCP server you must enter the network configuration manually NOTE RAID controller module network configurations can be assigned using a DHCP server the default setting However if a DHCP server is not available for 150 seconds the
249. so that you can reuse the drives in another disk group or in another storage array W hen you erase security enabled physical disks ensure that the data cannot be read W hen all of the physical disks that you have selected in the Physical tab are security enabled and none of the selected physical disks is part of a disk group the Secure Erase option is displayed in the Physical Disk menu The storage array password protects a storage array from potentially destructive operations by unauthorized users T he storage array password is independent from self encrypting disk and must not be confused with the pass phrase that is used to protect copies of a security key It is recommended that you set a storage array password Creating a Security Key W hen you create a security key it is generated by and securely stored by the array You cannot read or view the security key A copy of the security key must be kept on some other storage medium for backup in case of system failure or for transfer to another storage array A pass phrase that you provide is used to encrypt and decrypt the security key for storage on other media W hen you create a security key you also provide information to create a security key identifier Unlike the security key you can read or view the security key identifier The security key identifier is also stored on a physical disk or transportable media T he security key identifier is used to identify which key the storage
250. solid green see Planning RAID Controller M odules on page 31 Ensure that all the cables are attached correctly according to array mode you selected Turn off the server storage array and expansion enclosures Reseat the RAID controller module and reconnect cables on the storage array and the server Turn on the expansion arrays and then the storage array and wait until the system is fully booted Turn on the server Check the link status LED If the link status LED is not green replace the cables If the problem is not resolved see G etting Help on page 265 Reboot the host server K NOTE You must turn off the host server before resetting the cables on the storage array or expansion enclosure If the problem is not resolved see G etting Help on page 265 Troubleshooting Your Array 259 Troubleshooting a Wet Storage Array A CAUTION Many repairs may only be done by a certified service technician You must only perform troubleshooting and simple repairs as authorized in your product documentation or as directed by the online or telephone service and support team Damage due to servicing that is not authorized by Dell is not covered by your warranty Read and follow the safety instructions thatcame with the product 1 Turn off the array and disconnect all the cables 2 Remove the following components from the array See M anagement Installing Array Components on page 201 e Hard drives e RAID con
251. ss phrase M ake a record of the pass phrase you entered and the security key identifier it is associated with You need this information for later secure operations 7 Click C hange Key 8 Makea record of the security key identifier and the file name from the C hange Security Key C omplete dialog and click O K Saving a Security Key You save an externally storable copy of the security key when the security key is first created and each time it is changed You can create additional storable copies at any time To save a new copy of the security key you must provide a pass phrase T he pass phrase you choose does not need to match the pass phrase used when the security key was created or last changed The pass phrase is applied to the particular copy of the security key you are saving Configuration Disk Groups and Virtual Disks 111 To save the security key for the storage array 1 IntheAMW toolbar select Storage Array Physical D isk Security Save Security Key File T he Save Security Key File E nter Pass Phrase window is displayed 2 Edit the default path by adding a file name to the end of the path or click Browse navigate to the required folder and enter the name of the file 3 In Pass phrase enter a string for the pass phrase The pass phrase must be between 8 and 32 characters long e contain at least 1 uppercase letter e contain at least 1 lowercase letter e contain at least 1 number e contain
252. ssword dialog type the current password for the storage array and click OK Changing Expansion Enclosure ID Number W hen an MD 1200 Series expansion enclosure is connected to an M D 3200 Series storage array for the first time an enclosure ID number is assigned and maintained by the expansion enclosure T his enclosure D number is also shown in the M DSM To change the enclosure ID numbers 1 Inthe AMW select the storage array and select Storage Array gt C hange gt Enclosure ID 2 Select a new enclosure ID number from the C hange E nclosure ID list The enclosure ID must be between 0 and 99 inclusive 3 To save the changed enclosure ID click C hange Changing the Enclosure Order in the Physical Pane You can change the order of the RAID controller modules and the expansion enclosures in the Physical pane to match the hardware configuration in your storage array T he Physical pane that initially is displayed is a default view that may not match your storage array T he enclosure order change remains in effect until it is modified again Configuration About Your Storage Array 75 To change the enclosure order in the Physical pane 1 Inthe AM W select Storage Array C hange E nclosure O rder 2 From the enclosures list select the enclosure you want to move and click either Up or Down to move the enclosure to the new position 3 Click OK If you have set a password for the selected storage array the E nter P
253. station Removing a storage array does not affect the storage array or its datain any way Removing a storage array simply removes it from the list of storage arrays that are displayed in the drop down list in the Array Selector If a storage array is accidentally removed it can be added again See Adding Storage Arrays on page 66 You can remove the storage array only from the EM W To remove the storage array 1 Inthe EMW select the D evices tab and select the relevant managed storage array 2 Select Edit Remove Storage Array A message prompts you for a confirmation for the removal of the selected storage array 3 To remove the storage array click Yes Configuration About Your Storage Array 73 Enabling Premium Features You can enable premium features on the storage array To enable the premium features you must obtain a feature key file specific to the premium feature that you want to enable from your storage supplier To enable premium features 1 From the toolbar in AM W select Storage Array gt Premium Features The Premium Features and Feature Pack Information window is displayed 2 Select the relevant premium feature and click Enable The Select Feature Key File dialog is displayed 3 Navigate to the relevant folder select the appropriate key file and click OK 4 Click Close For more information see the PowerVault M odular Disk Storage M anager online help topics Failover Alert Display You
254. storage partition you can change the mapping to a higher LUN Changing the RAID Controller Module Ownership of a Virtual Disk ora Disk Group You can change the RAID controller module ownership of a virtual disk or a disk group You can change the RAID controller module ownership of a standard virtual disk or a snapshot repository virtual disk You cannot directly change the RAID controller module ownership of a snapshot virtual disk because the snapshot virtual disk inherits the RAID controller module owner of its associated source virtual disk Changing the RAID controller module ownership of a virtual disk changes the preferred RAID controller module ownership of the virtual disk During a virtual disk copy the same RAID controller module must own both the source virtual disk and the target virtual disk Sometimes both virtual disks do not have the same preferred RAID controller module when the virtual disk copy starts Therefore the ownership of the target virtual disk is automatically transferred to the preferred RAID controller module of the Configuration Disk Groups and Virtual Disks 127 source virtual disk W hen the virtual disk copy is completed or is stopped ownership of the target virtual disk is restored to its preferred RAID controller module If ownership of the source virtual disk is changed during the virtual disk copy ownership of the target virtual disk is also changed U nder certain operating system environments i
255. t Context Agent Softw are The host context agent software module is the software component that resides on the server or management station that communicates with the M D 3200 Series storage arrays The SM agent software automatically starts after you reboot the host Windows To restart the SM agent software in W indows 1 Click Start Settings C ontrol Panel Administrative Tools Services or Click Start Administrative Tools Services 2 In the Services dialog select M odular Disk Storage M anager Agent 3 If the modular disk storage manager agent is running click Action Stop then wait approximately 5 seconds 4 Click Action Start Linux To start or restart the host context agent software in Linux enter the following command at the prompt SMagent start The SM agent software may take a little time to initialize The cursor is shown but the terminal window does not respond W hen the program starts the following message is displayed SMagent started Troubleshooting Your Storage Array Software 251 After the program completes the startup process text similar to the following messages is displayed Modular Disk Storage Manager Agent Version 90 02 A6 14 Built Wed Feb 03 06 17 50 CST 2010 Copyright C 2009 2010 Dell Inc All rights reserved hecking device lt n a gt dev sgl10 Activating hecking device dev sdb dev sg11 Skipping hecking device lt n a gt dev sg3 Activating hec
256. t Your Storage Array 77 78 10 To include the contact information of the sender in the e mail alert select Include contact information with the alerts and type the contact information K NOTE Including the contact information in the e mail alert is optional Select the e mail tab to configure the email destinations Adding an email address In e mail address type the e mail address and click Add e Replacing an e mail address In the C onfigured E mail addresses area select the e mail address to be replaced type the replacement e mail address in E mail address and click Replace e Deleting an e mail address In the C onfigured E mail addresses area select the e mail address and click D elete e Validating an e mail address Type the e mail address in E mail address or select the e mail address in the C onfigured E mail addresses area and click Test A test e mail is sent to the selected e mail address A dialog with the results of the test and any error is displayed For the selected e mail address in Information To Send select e Event Only T he alert e mail contains only the event information This alert type is the default e Event Profile T he alert e mail contains the event information and the storage array profile Event Support The alert email contains the event information and a compressed file that contains complete support information for the storage array that has gen
257. t may be necessary to reconfigure the multi path driver before an I O path can be used 1 Do you want to change the RAID controller module ownership of a virtual disk or a disk group e Change the RAID controller module ownership of a virtual disk Go to step 2 e Change the RAID controller module ownership of a disk group Go to step 3 2 Tochange the RAID controller module ownership of a virtual disk perform these steps a Select the Logical tab b Select the virtual disk c Select Virtual Disk gt C hange gt O wnership Preferred Path Alternatively you can right click the virtual disk and select C hange gt Ownership Preferred Path from the pop up menu d Select the RAID controller module N CAUTION Possible loss of data access If you do not use a multi path driver shut down any host applications that are currently using the virtual disk This action prevents application errors when the I O path changes e Click Yes The ownership of the virtual disk is changed I O to the virtual disk isnow directed through this I O path You are finished with this procedure NOTE The virtual disk may not use the new 1 0 path until the multi path driver reconfigures and recognizes the new path This action usually takes less than 5 minutes 3 Tochangethe RAID controller module ownership of a disk group perform these steps a Select the Logical tab b Select the disk group 128 Configuration Disk Groups and
258. t of a data loss For example if you back up your data at the end of every work day and keep hourly snapshots from 8AM to 5PM data can be recovered from the snapshots in windows smaller than one hour To accomplish this type of rapid recovery create a schedule that contains a start time of 8AM and an end time of 5PM then select 10 snapshots per day on M onday through Friday with no end date For more information on creating snapshot virtual disk schedules see the following sections on creating snapshots Guidelines for Creating Snapshot Schedules Certain guidelines apply when creating snapshot virtual disk schedules Scheduled virtual disk snapshot operations do not occur if The snapshot virtual disk is mapped Thestorage array is offline or powered off The snapshot virtual disk isin use as a source virtual disk during a Virtual Disk C opy operation A copy operation is Pending or In progress e Deleting a snapshot virtual disk that contains a schedule also deletes the schedule Snapshot schedules are stored in the configuration database on the storage array T he M anagement Station does not need to be running for scheduled snapshot operations to occur Snapshot schedules can be created when the snapshot virtual disk is initially created or can be added to existing snapshot virtual disks Configuration Premium Feature Snapshot Virtual Disks 141 Enabling and Disabling Snapshot Schedules A scheduled snapshot o
259. that shows discovered storage arrays unidentified storage arrays and the status conditions for the storage arrays Discovered storage arrays are managed by MDSM Unidentified storage arrays are available to MDSM but not configured for management T he right side of the Devices tab has a Table view that shows detailed information for each storage array In the EM W you can Discover hosts and managed storage arrays on the local sub network e Manually add and remove hosts and storage arrays e Locate the storage arrays e Name or Rename discovered storage arrays Add storage array comments to the Table view e Sort rows in the Table view according to different criteria e Store your EM W view preferences and configuration data in local configuration files The next time you open the EM W data from the local configuration files is used to show customized view and preferences e Monitor the status of managed storage arrays and indicate status using appropriate icons Add or remove management connections e Configure alert notifications for all selected storage arrays through e mail or SNMP traps e Report critical events to the configured alert destinations e Launch the AMW for a selected storage array Run a script to perform batch management tasks on specific storage arrays Import the operating system theme settings into the M DSM e Upgrade firmware on multiple storage arrays concurrently 62 Configuration Ove
260. that the controller firmware is compatible with M DSM on your management station If the controller firmware was upgraded the MD SM may not have access to the storage array A new version of MDSM may be needed to manage the storage array with the new version of the controller firmware If this problem exists see dell com support Look to see if there is too much network traffic to one or more controllers This problem corrects itself because the M DSM tries to re establish communication with the controllers in the storage array at regular times If the storage array was unresponsive and a subsequent try to connect to the storage array succeeds the storage array becomes responsive For an out of band storage array look to see if management operations are taking place on the storage array from other storage management stations The type of management operations being done and the number of management sessions taking place together establish the number of TCP IP connections made to a controller W hen the maximum number of TCP IP connections are made the controller stops responding This problem corrects itself because after some TCP IP connections complete the controller then becomes responsive to other connection tries If the storage array is still unresponsive problems may exist with the controllers If these problems exist see dell com support 250 Troubleshooting Your Storage Array Software Starting or Restarting the Hos
261. the storage array name Click Yes The new storage array name is displayed in the Select storage array table Repeat step 2 through step 4 to name or rename additional storage arrays K NOTE Avoid arbitrary names or names that may lose meaning in the future Configuration About Your Storage Array Setting a Password You can configure each storage array with a password to protect it from unauthorized access MDSM prompts for the password when an attempt is made to change the storage array configuration such as when a virtual disk is created or deleted View operations do not change the storage array configuration and do not require a password You can create a new password or change an existing password K NOTE Itis recommended that you use a long password with at least 15 alphanumeric characters to increase security To set a new password or change an existing password 1 Select the relevant storage array and navigate to the AM W for that storage array See Array M anagement W indow on page 63 The AMW for the selected storage array is displayed In the AM W perform one of these actions e Select the storage array in the Logical pane and then select Storage Array Set Password e Select the Setup tab and then click Set a Storage Array Password e Inthe AMW select the Logical tab right click and select Set Password The Set Password dialog is displayed If you are resetting the password type the
262. the download e Make sure that the firmware that you download to the physical disks are compatible with the physical disks that you select e Donot make any configuration changes to the storage array while downloading the firmware NOTE Downloads can take several minutes to complete During a download the Download Physical Disk Progress dialog is displayed Do not attempt another operation when the Download Physical Disk Progress dialog is shown Management Firmware Downloads 195 To download Physical Disk Firmware 1 8 From the AM W select Advanced M aintenance D ownload Physical D isk The Download Physical D isk Introduction window is displayed Click Next T he D ownload Physical D isk Firmware Add Packages window is displayed In the Selected Packages area click Add Navigate to the location of the packages and click OK The selected package is added to the Packages to be transferred area Click Next The D ownload Physical D isk Firmware Select Physical Disks window is displayed In the C ompatible Physical D isks tab select the appropriate physical disks or Select all the physical disks The C onfirm D ownload dialog is displayed Type yes and click OK The Download Physical D isk Firmware Progress window is displays the progress of physical disk firmware download After the firmware download is complete click C lose For more information see the PowerVault M odular Disk Sto
263. the drop down list shows the current host group or the host associated with the selected virtual disk In Logical unit number select the appropriate LUN The drop down list shows only the currently available LU Ns that are associated with the selected virtual disk Click OK Stop any host applications associated with this virtual disk and unmount the virtual disk if applicable from your operating system In the C hange M apping dialog click Yes to confirm the changes The mapping is checked for validity and is saved T he Defined M appings pane is updated to display the new mapping T he Topology pane is also updated to reflect any movement of host groups or hosts K NOTE Ifa password is seton the storage array the Enter Password dialog is displayed Type the current password for the storage array and click OK If configuring a Linux host run the rescan_dm_devs utility on the host and remount the virtual disk if required T his utility is installed on the host as part of the M DSM install process Configuration Disk Groups and Virtual Disks 121 8 Restart the host applications Changing Controller Ow nership of the Virtual Disk If the host has a single data path to the M D storage array the virtual disk must be owned by the controller to which the host is connected You must configure this storage array before you start 1 O operations and after the virtual disk is created You can change the RAID controller module
264. the modification priority defaults to the lowest priority The current priority is shown only if a single virtual disk is selected Changing the modification priority by using this option modifies the priority for the selected virtual disks Configuration Disk Groups and Virtual Disks To change the virtual disk modification priority 1 2 3 6 7 Inthe AM W select the Logical tab Select a virtual disk In the toolbar select Virtual D isk gt C hange M odification Priority The C hange M odification Priority window is displayed Select one or more virtual disks To select nonadjacent virtual disks press lt Ctrl gt click To select adjacent virtual disks press lt Shift gt click To select all of the available virtual disks click Select All M ove the Select modification priority slider bar to the desired priority Click OK A message prompts you to confirm the change in the virtual disk modification priority Click Yes Click OK Changing the Virtual Disk Cache Settings You can specify the cache memory settings for a single virtual disk or for multiple virtual disks on a storage array Guidelines to change cache settings for a virtual disk After opening the C hange C ache Settings dialog the system may prompt you that the RAID controller module has temporarily suspended caching operations This action may occur when a new battery is charging when a RAID controller module is removed or if a mismatch
265. troller modules e Power supply cooling fan modules e Control panel Backplane 3 Let the system dry thoroughly for at least 24 hours 4 Reinstall the components you removed in step 2 5 Connect all the cables and turn on the array If the array does not start properly see Getting Help on page 265 260 Troubleshooting Your Array Troubleshooting a Damaged Array A CAUTION M any repairs may only be done by a certified service technician You must only perform troubleshooting and simple repairs as authorized in your product documentation or as directed by the online or telephone service and support team Damage due to servicing that is not authorized by Dell is not covered by your warranty Read and follow the safety instructions that came with the product 1 Ensure that the following components are properly installed e Hard drives RAID controller module s e Power supply cooling fan modules e Control panel Backplane 2 Ensure that all the cables are properly connected and that there are no damaged pins in the connectors 3 Run diagnostics available in D ell PowerVault M odular Disk MD Storage M anager software In the AM W select a component in the Physical pane of the Physical tab Select Advanced Troubleshooting Run Diagnostics If the test fails see G etting Help on page 265 Troubleshooting RAID Controller M odules Conditions Certain events can cause a RAID controller module to fail and or shut down Un
266. ttributes e Host name A name that uniquely identifies the host server e Host group used in Cluster solutions only Two or more host servers associated together to share access to the same virtual disks This host group is a logical entity you can create in MDSM All host servers in ahost group must be running the same operating system Host type T he operating system running on the host server Snapshot Virtual Disks A snapshot is a point in time image of a virtual disk The snapshot provides an image of the virtual disk at the time the snapshot was created You create a snapshot so that an application for example a backup application can access the snapshot and read the data while the source virtual disk remains Planning M D3200 Series Storage Array Terms and Concepts 51 online and user accessible W hen the backup is completed the snapshot virtual disk is no longer needed You can create up to four snapshots per virtual disk Snapshots are used to recover previous versions of files that have changed since the snapshot was taken Snapshots are implemented using a copy on write algorithm which makes a backup copy of data the instant an error occurs Data on a virtual disk is copied to the snapshot repository before it is modified Snapshots can be created instantaneously or can be scheduled and take up less overhead than a full physical copy process Snapshot Repository Virtual Disk W hen you create a snapsh
267. ture using the D ell PowerVault M odular D isk Storage M anagement M D SM software W hen the high performance tier feature is enabled or disabled the array restarts During this time data access and management access to the controller is be temporarily lost It is recommended that all 1 0 to the array be stopped before this feature is enabled or disabled W hile the array is restarting the state of the array in the MDSM application may change from O ptimal to U nresponsive W hen the restart completes the status returns to O ptimal W hen the array status returns to O ptimal O to the array can be restarted Configuration Premium Feature Upgrading to High Performance Tier 177 178 Configuration Premium Feature Upgrading to High Performance Tier Configuration Device M apper Multipath for Linux Overview The M D3200 Series storage array uses a Linux operating system software framework known as Device M apper DM to enable multipath capabilities on Linux Host Servers The DM multipath functionality is provided bya combination of drivers and utilities This chapter describes how to use those utilities to complete the process of enabling M D 3200 Series storage array on a Linux system K NOTE The Device M apper technology replaces an earlier proprietary technology known as M PP M PP was used to enable multipathing for the previous M D generation M D3000 Series storage arrays K NOTE The required Device
268. ual Disk Mappings Creating 119 Modifying and Removing 121 Removing 122 Hot Spare Drive Protection 116 Global Hot Spares 116 Operation 116 Hot Spares and Rebuild 115 I O Data Path Protection 92 Inside the box 20 installing backplane 224 control panel MD 1200 220 drive blank 204 EMM 212 EMM blank 210 front bezel 202 hard drive 206 hard drives 206 power supply cooling fan module 217 L Load Balancing 56 Locating a Physical Disk 244 M M anaging Host Groups 88 M anaging Host Port Identifiers 93 MDSM 20 M edia Errors and Unreadable Sectors 198 M edia Scan Changing settings 136 Suspending 137 M icrosoft Virtual Disk Service 227 Volume Shadow C opy Service 227 M icrosoft Services Index 269 Virtual Disk Copy 53 Monitoring Performance 57 M ulti Path Preferred and Alternate Controllers and Paths 55 Multi Path Software 54 N Non Exportable Components 133 0 Other Information 20 P phone numbers 265 Physical Disk Security with Self Encrypting Disk 106 Physical Disk States 38 Physical Disks 38 Erasing Secure 113 Unlocking Secure 113 Physical Disks Virtual Disks and Disk Groups 37 Power Indicator C odes 30 Power Supply and Cooling Fan Features 29 Preferred RAID Controller M odule Ownership 170 Preparing Host Servers Simple path 143 R RAID 40 Changing Level of disk group 129 RAID 0 41 RAID 1 42 R
269. ult Group To prevent this action from occurring remove the access virtual disk mapping from the D efault Group M ost hosts have 256 LUNs mapped per storage partition The LUN numbering is from 0 through 255 If your operating system restricts LUNs to 127 and you try to map a virtual disk to a LUN that is greater than or equal to 127 the host cannot access it An initial mapping of the host group or host must be created using the Storage Partitioning W izard before defining additional mappings See Storage Partitioning on page 130 To create host to virtual disk mappings Configuration Disk Groups and Virtual Disks 119 120 In the AM W select the M appings tab In the Topology pane select e Default Group Undefined mappings node e Individual defined mapping Host group e Host In the toolbar select M appings D efine Additional M apping The Define Additional M apping window is displayed In Host group or host select the appropriate host group or host All defined hosts host groups and the default group are displayed in the list K NOTE When configuring an iSCSI storage array including the M D3200 or M D3220 if a host or a host group is selected that does not have a SAS host bus adapter SAS HBA host port defined a warning dialog is displayed In Logical unit number select a LUN The supported LU Ns are 0 through 255 Select the virtual disk to be mapped in the Virtual D isk area The Virtu
270. urce virtual disks for VSS snapshots must have names no longer than 16 characters The VSS hardware provider uses the source virtual disk name as a prefix for the snapshot and repository virtual disk names T he resulting snapshot and repository names are too long if the source virtual disk name exceeds 16 characters Management System Interfaces 227 VSS attaches to the service and uses it to coordinate the creation of snapshot virtual disks on the storage array VSS initiated snapshot virtual disks can be triggered through backup tools known as requestors The VSS Provider Configuration Tool offers the following configuration options Snapshot Repository Virtual Disk Properties T his section contains a drop down list for the RAID level and a field for entering source virtual disk capacity percentage for snapshot repositories Snapshot Repository Virtual Disk Location T his section contains a list of preferences for the location of the snapshot repository virtual disk T hese preferences are honored whenever conditions permit The Microsoft VSS installer service for storage provisioning is available on the M D 3200 resource media in the windows VD S_VSS directory K NOTE When registering VSS during your Windows setup the registration graphical user interface GUI prompts you to provide the name of your array because settings in the GUI are array specific not host specific Storage M anagement VSS H ardware Provider T i
271. ut Your Storage Array Planning RAID Controller M odules RAID Controller Modules The RAID controller modules provide high performance advanced virtual disk configuration and fault tolerant disk subsystem management E ach RAID controller module contains 2 GB or 4 GB of mirrored cache for high availability and is protected by a battery powered cache offload mechanism K NOTE The 4GB mirrored cache is an optional feature RAID controller modules provide the following data path and enclosure management functions e Monitoring and controlling enclosure environment elements temperature fans power supplies and enclosure LEDs e Controlling access to the physical disks e Communicating enclosure attributes and states to the host server and management station Each RAID controller module has multiple SAS IN ports for host access The ports provide redundant host connections and support a high availability storage environment Various configurations can be utilized in both single controller simplex and dual controller duplex modes to connect the storage enclosure to hosts depending on specific redundancy needs For information on cabling see the M D 3200 and M D 3220 Series storage array s D eployment G uide at dell com support manuals Planning RAID Controller M odules 31 RAID Controller Module Connectors and Features Figure 3 1 M D3200 Series SAS RAID Controller M odule aus Al 1
272. ve the majority of the work while the other controller is idle Limit the number of virtual disks in a disk group If multiple virtual disks are in a disk group consider e Theimpact each virtual disk has on other virtual disks in the same disk group e The patterns of usage for each virtual disk e Different virtual disks have higher usage at different times of day Load Balancing A load balance policy is used to determine which path is used to process I O M ultiple options for setting the load balance policies lets you optimize I O performance when mixed host interfaces are configured You can choose one of these load balance policies to optimize I O performance e Round robin with subset T he round robin with subset I O load balance policy routes I O requests in rotation to each available data path to the RAID controller module that owns the virtual disks T his policy treats all paths to the RAID controller module that owns the virtual disk equally for I O activity Paths to the secondary RAID controller module are ignored until ownership changes The basic assumption for the round robin policy isthat the data paths are equal With mixed host support the data paths may have different bandwidths or different data transfer speeds e Least queue depth with subset T he least queue depth with subset policy is also known as the least I Os or least requests policy This policy routes the next I O request to a data path that has the
273. vice and support team Damage due to servicing that is not authorized by Dell is not covered by your warranty Read and follow the safety instructions that came with the product CAUTION Use only hard drives that are tested and approved for use with the M D3200 Series CAUTION When installing a hard drive ensure that the adjacent drives are fully installed Inserting a hard drive carrier and attempting to lock its handle nextto a partially installed carrier can damage the partially installed carrier s shield spring and make it unusable If applicable remove the front bezel See Removing the Front Bezel on page 202 If applicable remove the drive blank from the bay See Removing a H ard Drive Blank on page 203 Press the release button to open the drive carrier release handle Insert the hard drive carrier into the drive bay until the carrier contacts the backplane Close the handle to lock the drive in place Management Installing Array Components Removing a Hard Drive From a Hard Drive Carrier Remove the screws from the slide rails on the hard drive carrier and separate the hard drive from the carrier See Figure 15 5 for PowerVault M D 3200 and Figure 15 6 for PowerVault M D 3220 Figure 15 5 Removing and Installing a Hard Drive Into a 3 5 Hard Drive Carrier 2 1 screws 4 2 hard drive 3 SAS screw hole 4 hard drive carrier Management Installing ArrayComponents 207 Figure 15 6 Removing and Installin
274. vice Status area click Stop Linux To enable the event monitor at the command prompt type SMmonitor start and press lt Enter gt W hen the program startup begins the system displays the following message SMmonitor started To disable the event monitor start terminal emulation application console ox xterm and at the command prompt type SMmonitor stop and press lt Enter gt W hen the program shutdown is complete the following message is displayed Stopping Monitor process 84 Configuration Event M onitor Configuration About Your Host Configuring Host Access M odular Disk Storage M anager M DSM software is comprised of multiple modules One of these modules is the Host Context Agent T he host context agent is installed as part of the MD SM installation and runs continuously in the background If the host context agent is running on a host the host and the host ports connected from it to the storage array are automatically detected by MDSM and are displayed on the M appings tab in the Array M anagement Window AM W For more information on the M appings tab see Using the M appings Tab on page 86 If the hosts are not detected automatically you can use the D efine H ost Wizard to define the hosts that access the virtual disks in the storage array Defining a host is one of the steps required to let the storage array know which hosts are attached to it and to allow access to the virtual disks For more in
275. view 61 User Interface 2 aaa 61 Enterprise Management Window 62 ArrayManagementWindow 63 6 Configuration About Your Storage Array lt i eh es ee ee 65 Out of Band andIn BandManagement 65 Storage Arrays ee 66 Adding StorageArrays 00 66 Setting Up YourStorageArray 68 Locating Storage Arrays 69 Naming or Renaming Storage Arrays 70 SettingaPassword 0 71 Viewing Storage Array Connections 72 Adding Editing a Comment to an Existing StorageArray B Removing StorageArrays B Enabling Premium Features 74 FailoverAlertDisplay 0 4 74 Changing the Cache Settings on the StorageArray os r eoa ee ee 75 Changing Expansion Enclosure ID Number 75 Changing the Enclosure Order in the Physical Pane oaa aaa 75 Configuring Alert Notifications 76 Configuring E mailAlerts 77 ConfiguringSNMPAlerts 79 Battery Settings 0 dan n ia 81 Contents Setting the Storage Array RAID Controller ModuleClocks 00 82 7 Configuration Event Monitor 83 Enabling or Disabling the EventMonitor 84 WINdOWS es 4aaG he eh aoe k ead APES Eo 84 UNUK os oat ete pte aos ae Ayers a E we Fg 84 8 Configuration About Your Host 85 Configuring Host Access 00 4 85 Using the Mappings Tab 0 00
276. y RAID controller modules physical disks and other hardware components M appings tab You can define the hosts host groups and host ports You can change the mappings to grant virtual disk access to host groups and hosts and create storage partitions Setup tab You can complete the initial setup tasks to configure the storage array Support You can complete common support tasks like downloading RAID controller module firmware viewing the online help and so on In the AM W you can 64 Provide storage array options for example renaming a storage array changing a password or enabling a background media scan Provide the ability to configure virtual disks from the storage array capacity define hosts and host groups and grant host or host group access to sets of virtual disks called storage partitions M onitor the health of storage array components and report detailed status using applicable icons Provide applicable recovery procedures for a failed logical component or a failed hardware component Present a view of the Event Log for the storage array Present profile information about hardware components such as RAID controller modules and physical disks Provide RAID controller module management options such as changing ownership of virtual disks or placing a RAID controller module online or offline Provide physical disk management options such as assignment of hot spares and locating the physical di
277. y the RAID controller modules when a replacement physical disk is inserted into the storage array Global Hot Spares The M D 3200 Series supports global hot spares A global hot spare can replace a failed physical disk in any virtual disk with a redundant RAID level as long as the capacity of the hot spare is equal to or larger than the size of the configured capacity on the physical disk it replaces including its metadata Hot Spare Operation W hen a physical disk fails the virtual disk automatically rebuilds using an available hot spare W hen a replacement physical disk is installed data from the hot spare is copied back to the replacement physical disk This function is called copy back By default the RAID controller module automatically configures the number and type of hot spares based on the number and capacity of the physical disks in your system A hot spare may have the following states Standby hot spare is a physical disk that is assigned as a hot spare and is available to take over for any failed physical disk e in use hot spare is a physical disk that is assigned as a hot spare and is currently replacing a failed physical disk Hot Spare Drive Protection You can use a hot spare physical disk for additional data protection from physical disk failures that occur in a RAID level 1 or RAID level 5 disk group If the hot spare physical disk is available when a physical disk fails the RAID controller module uses
278. y using the M anual method you must use the criteria specified in Table 9 2 Table 9 2 Criteria for Enclosure Loss Protection RAID Level Criteria for Enclosure Loss Protection RAID level 5 Ensure that all the physical disks in the disk group are located in or RAID level different expansion enclosures 6 Because a RAID level 5 requires a minimum of 3 physical disks enclosure loss protection cannot be achieved if your storage array has less than 3 expansion enclosures Because a RAID level 6 requires a minimum of 5 physical disks enclosure loss protections cannot be achieved if your storage array has less than 5 expansion enclosures RAID level 1 Ensure that each physical disk in a mirrored pair is located in a different expansion enclosure This enables you to have more than two physical disks in the disk group within the same expansion enclosure For example if you are creating a six physical disk disk group 3 mirrored pairs you can achieve enclosure loss protection with only two expansion enclosures by specifying that the physical disk in each mirrored pair are located in separate expansion enclosures For example e Mirror pair 1 Physical disk in enclosure 1 slot 1 and physical disk in enclosure 2 slot 1 e Mirror pair 2 Physical disk in enclosure 1 slot 2 and physical disk in enclosure 2 slot 2 e Mirror pair 3 Physical disk in enclosure 1 slot 3 and physical disk in enclosure 2 slot 3 Becaus

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