DELL PowerVault MD3200
Contents
1. ADA cutres A A ist 18 DESO Man adas EA AOTAN ATEA 19 MD3200 Series Storage Manager Software Packages cecsecceesseeeeeeeeeeeeeeeeueetteeeeeeneentetsnneeney 19 EMECKORISe WINGOW weier o eE E A r E EA 20 Atay WINdOW A AAA A O Be 21 RECOVERY GUI Utica AI NASA 28 WOKING Wien PAYSA ang Log cal DISKS tias ri 29 DISK GFOUD CONNOTA ako Ae ars 29 WIFE Wal DISK CONAGUA O My ad Meda penta AA A 30 Configuration Metadata AA 31 GOD OE SAFE rra IA E A taras 31 Storage Partition Min lis 31 MOD SIO esis rnes e a E E EE E OR 32 Vreu k DEK EOD A E In eae ae OE ae ep oe ees 32 OME Adm O 33 Technical Guide Book for PowerVault MD3200MD3220 HOSE ONSra cd St eM DO sir 34 ENVIO e OO O os 35 POWer SUDDIY SUGGS orainari ia E AA 35 Thermal Management cistitis AIR E E EAEEREN 36 Over Temperature Sh UlGO Wars 36 Configuration GUIAS INES iii iio e Mincaaa nana mide abe 38 General CONMdgura ton RUNES anar 38 Tables Table le Selected Controller Peal ules sata adoos 8 Table Z Detailed Dimensions MM teorica ido sere emcee hada 8 Table 3 MD3200 and MD3220 Front Panel Feature Description ccccceeeee sees eeeeeeeeeeeeeeeennees 11 Table Power Mdicator DESC DELON sc A tale ee aural eae tale 14 tapie S SOOO FCO DIVES sd aula 15 TableGe Drive INdiCatOr Descrip sia ton 16 Table RAID COnnGuraniOn SUD DOL erica dt 30 Table 8 Supported Servers erat AAA montis Leen AAA AA 35 Fable 9 Power SUD ply SPECT Ca ON en 36 Table 40 Environment2. DC Power Power supply cooling fan fault AC Power Hard Drives The LED lights green when the DC output voltage is within the limit If this LED Is off it indicates that the DC output voltages are not within the limit The LED lights amber when the DC output voltage is not within the limit or a fault with the fan is detected If this LED is off it indicates that no fault condition is present The LED lights green when the AC input voltage is within the limit If this LED is off it indicates either there is no power or the AC input voltage is not within the limit The MD3200 and MD3220 support SAS hot pluggable HDDs hard disk drives and SSD solid state drives MD3200 allows for both 3 5 inch and 2 5 inch form factor drives and the MD3220 allows for 2 5 inch form factor drives Note that 2 5 HDD in the MD3200 requires a unique drive carrier that houses a 2 5 HDD and fits into a 3 5 HDDslot Any combination of SAS rotational speeds and SSD drives can be mixed within an MD3200 or MD3220 enclosure 14 Technical Guide Book for PowerVault MD3200MD3220 Table 5 Supported Drives 2 5 SAS HDDs up to 6Gb s SSDs up to 3Gb s 3 5 SAS HDDs up to 6Gb s SATA interface drives are not supported with the MD3200 and MD3220 6Gb s SAS interface HDDs and 3Gb s SAS interface SSDs are configured in the MD3200 and MD3220 from Dell s factory 3Gb s SAS interface HDDs are supported in the field with t
3. Migration This level of migration changes the RAID level of a virtual group on the existing drives without requiring the relocation of data With this dynamic feature customers can easily adjust RAID levels when their application availability or performance needs change Dynamic Segment Size Migration With this feature the segment size of a given virtual disk can be dynamically changed Dynamic Defragmentation Dynamic defragmentation allows the user to rearrange virtual disks and consolidates free capacity within a virtual disk group resulting in optimized access patterns for existing and newly created volumes Non disruptive firmware upgrades Enables controller firmware upgrades to occur with no interruption to data access The new firmware is 33 Technical Guide Book for PowerVault MD3200MD3220 transferred to the first controller its flash memory is updated and the controller is rebooted The firmware is then passed from the first controller to the second and the process is repeated With a multi path driver installed access to all storage arrays virtual disks is maintained throughout the process Host Operating System Support The MD3200 series of storage arrays support the following operating systems Microsoft Windows 2008 Microsoft Windows 2003 Microsoft Hyper V RedHat Enterprise Linux SuSE Enterprise Linux VMware Xen Server RTS Please consult with the MD3200 MD3220 Support Matrix for a complete list of
4. Writes are particularly be slightly more fails data is lost demanding than RAID 5 Virtual Disk Configuration A virtual disk is a logical structure on a storage array for data storage A virtual disk is created by slicing a disk group into a stripe set with a defined capacity Each disk group supports up to one or more virtual disks and a maximum of 256 virtual disks per MD3200 series of storage system During the virtual disk creation process the user specifies the capacity of the virtual disk and the virtual disk name Additional settings include preferred controller ownership and a virtual Disk Disk Disk Disk disk to LUN mapping parameter See Storage 1 2 3 4 Partitioning section 30 Technical Guide Book for PowerVault MD3200MD3220 Configuration Metadata MD3200 series of controllers store configuration metadata in a private 512 MB region on every configured physical disk This metadata area contains physical disk state and status information virtual disk state and status information and controller and subsystem information The metadata on each physical disk stores that physical disk s state and status the worldwide name of its disk group the virtual disks it contains and the definitions for those virtual disks Additionally one physical disk in each disk group with a minimum of three in each storage system stores the controller and subsystem level information Storing metadata in this nonvolatile region provides the hi
5. in an optimal status total capacity RAID level media and interface type as well as controller ownership The physical component s overview is provided in the Properties pane and is associated with the logical component selected in the Logical pane A greater detailed view can be found by right clicking a 23 Technical Guide Book for PowerVault MD3200MD3220 component and selecting View Associated Physical Components This physical view can also be retrieved by selecting the Physical tab which will be covered next The Physical tab provides both a physical view of the storage array as well as detailed information regarding the physical components Within the Physical tab the Physical pane appears on the left and the Properties pane appears on the right The Physical pane shows a graphical representation of the physical components in the storage subsystem such as the RAID controller modules and the expansion enclosures while the Properties pane displays detailed information about the component that is selected in the Physical pane Figure 18 MD Storage Manager Physical Tab ve SAS PowerVault Modular Disk Storage Manager Array Management AE EA mm POWERVAULT MODULAR DISK STORAGE MANAGER Storage Array View Mappings Disk Group Virtual Disk RAID Controller Module Physical Disk Advanced Help _ 8 T 8 Ba al s SAS W optimal Summary Logical Physical Mappings Setup Support Physical cP rpetties i
6. storage array Virtual disk copy creates a complete physical copy or a clone of a virtual disk within a storage array The clone virtual disk is a unique entity that can be assigned to any host and used by applications requiring a point in time PIT copy of production data such as backup application testing or development information analysis or data mining without affecting the performance of the production virtual disk PiT Clone Virtual disk Copy Virtual disk copy is configured and accessed via easy to use wizards It supports up to eight concurrent copies taking place within a single array Virtual disk copy is a 32 Technical Guide Book for PowerVault MD3200MD3220 background operation with five user defined priority settings enabling administrators to minimize either copy time or the overall I O impact to the storage system As virtual disk copy is controller based it requires no host interaction or CPU cycles minimizing the impact to applications and the storage infrastructure Virtual disk copy can be used in conjunction with virtual disk snapshot which creates a PiT image of a virtual disk while maintaining read write access enabling a complete PiT clone to be created without interrupting the I O activity of the production virtual disk Additionally virtual disk copy can be used to redistribute data moving virtual disks from older slower disk physical disks to newer faster or higher Capacity physical di
7. supported configurations 34 Technical Guide Book for PowerVault MD3200MD3220 Table 8 Supported Servers Please consult with the MD3200 MD3220 Support Matrix for the most up to date list of Supported servers Environmental Power Supply Specs The PowerVault MD3200 and MD3220 power supply is rated at 600 W It operates on input voltages ranging from 100 240 V auto switching to the sensed line level EMC classification is Light Industry FCC classification is Class A 35 Technical Guide Book for PowerVault MD3200MD3220 Table 9 Power Supply Specifications AC Characteristics Minimum Efficiency measured 20 50 and Must Meet Climate Savers requirements 80 output load over full range of AC input and environmental conditions Load Condition Efficiency 20 87 50 90 100 87 Peak Output Power 600 Watts Thermal management The cooling system for the enclosure is designed to allow all components power supplies RAID controllers HDDs SSDs etc to meet their full operating specifications There may be up to four fans in each power supply fan module This configuration provides N 1 fan redundancy meaning that the enclosure can be sufficiently cooled for normal operation even if one fan fails Firmware shall continuously monitor the temperature sensors within the enclosure and take proper actions to throttle the fans in order to maintain optimal operating temperature Over Temperature Shutdown
8. A Connecting the MD3200 and MD3220 to servers requires the use of the 6Gb SAS HBA The SAS 5 E HBA will not work with the MD3200 series of arrays Key features of the 6Gb SAS HBA Dual ports PCI Express 2 0 Host Interface SAS 2 0 compliant Fits in standard PCI Express card slots Standard Y length Y height card design Coexistence with PERC H700 H800 and PERC 6 in the same server Coexistence with PERC H200 SAS 6 and SAS 5 in the same server Support for select 9G Tape Only 10G 11G Platforms 18 Technical Guide Book for PowerVault MD3200MD3220 MD Storage Manager The MD Storage Manager provides the perfect combination of robustness and ease of use two attributes not commonly found together in an entry level storage management tool The new MD Storage Manager graphical user interface GUI Is ideally suited for the full time storage administrator who wants complete control over their storage configuration as well as the part time system administrator who needs an intuitive interface that helps them ensure optimal storage utilization Features of the next generation MD Storage Manager Automated O path protection with host based multipath failover drivers Centralized management of one or more MD3200 and or MD3220 arrays from any location Backwards compatibility with MD3000 and or MD3000i arrays Integrated storage partitioning snapshot and virtual disk copy functionality Support for up to 8 partitions Support for u
9. DELL PowerVault MD3200 MD3220 Series of Storage Arrays A Dell Technical Guide Book Technical Guide Book for PowerVault MD3200 and MD3220 Series Arrays THIS WHITE PAPER IS FOR INFORMATIONAL PURPOSES ONLY AND MAY CONTAIN TYPOGRAPHICAL ERRORS AND TECHNICAL INACCURACIES THE CONTENT IS PROVIDED AS IS WITHOUT EXPRESS OR IMPLIED WARRANTIES OF ANY KIND 2010 Dell Inc All rights reserved Reproduction of this material in any manner whatsoever without the express written permission of Dell Inc is strictly forbidden For more information contact Dell Dell the DELL logo and the DELL badge PowerConnect and PowerVault are trademarks of Dell Inc Microsoft Windows Windows Server and Hyper V are either trademarks or registered trademarks of Microsoft Corporation in the United States and or other countries Other trademarks and trade names may be used in this document to refer to either the entities claiming the marks and names or their products Dell Inc disclaims any proprietary interest in trademarks and trade names other than its own J une 2010 Technical Guide Book for PowerVault MD3200MD3220 Contents PROGUCE OV CUNO Wasted rst etate o a ata Adee aM Ae de a in cele DEE Ma 4 SiG lems qe Mili eploio SESI ASZ 0 eee ee eae he ee A 4 Biel E E ae E a ia E T 8 Front VIEW and Fe UU ainia od ei an 9 o OS 14 Hard DRIVE MOCOS atasca laicos mierda So ascii 16 Storage Capacity EXPANSION ato ao 17 SAS CADIE E ORAR O E NAT 18 OGD SAS
10. Guide Book for PowerVault MD3200MD3220 The next tab is the Setup tab which provides access to nearly all routine administrative tasks that a user would typically run into Figure 20 MD Storage Manager Setup Tab Mercury_SAS PowerVault Modular Disk Storage Manager Array Management BAX POWERVAULT MODULAR DISK STORAGE MANAGER Storage Array View Mappings DiskGroup Virtual Disk RAID Controller Module Physical Disk Advanced Help aa ya a e Mercury SAS Y Summary Logical Physical Mappings Setup Support Initial Setup Tasks Storage Array Configuration Blink Storage Array 23 Turn on the indicator lights For the storage array to identify it physically El Rename Storage Arra Ez Rename the storage array so it can be easily identified in the storage management software G Set a Storage Array Password Set a password For the storage array to prevent unauthorized users from making configuration changes aj Configure Storage Arra Create disk groups virtual disks and hot spare physical disks Map Virtual Disks Map virtual disks to hosts so that the virtual disks can be used for I O operations Save Configuration Save configuration parameters in a file to use for restoration or replication Optional Tasks ng Manually Define Hosts Define the hosts and Host Port Identifiers connected to the storage array Use this option only if the host is not automatically recognized and displayed in the Mappings tab Configure Ethernet
11. I_simplex Launched Array Management Window for Mercury_SAS The Enterprise Window Setup tab is also accessible in the Enterprise Window This Setup tab provides quick access to common setup tasks For example from the Setup tab window a user can upgrade controller firmware set alert notifications email and SNMP and perform other high level configuration functions 20 Technical Guide Book for PowerVault MD3200MD3220 Figure 15 MD Storage Manager Setup Tab PowerYault Modular Disk Storage Manager Enterprise Management DU ss E POWERVAULT MODULAR DISK STORAGE MANAGER Edit View Tools Help EPER ET 4 Setup Initial Setup Tasks Management Domain Edo Add Storage Array Add storage arrays so that they can be configured or managed den Name Rename Storage Arrays Name or rename storage arrays to make them easier to differentiate e Configure Alerts Configure alerts to send email or SNMP notification about problems Array Management pS Manage a Storage 4rra Launch the 4rray Management Window to perform configuration tasks E Upgrade RAID Controller Module Firmware Upgrade firmware on multiple storage arrays concurrently Note You MUST use this option in the Enterprise Management Window EMW to upgrade a storage array from pre O7 xx xx xx RAID contro Accessibility r Inherit System Settings L Inherit system settings For color and Font allows the PowerYault Modu
12. In order to prevent potential damage to the drives and subsequent loss of data the power supply has the capability to shut itself down or be shut down by the RAID controllers in the event of an over temperature condition When the power supply incorporates its internal thermal shutdown feature it will automatically restart when the over temperature condition no longer exists Hysteresis of at least 5 degrees is employed to prevent a frequent toggling on and off of the outputs 36 Technical Guide Book for PowerVault MD3200MD3220 Table 10 Environmental Specifications Operating Storage 10 to 35 C 50 to 95 F with a maximum temperature gradation of 10 C per hour Note For altitudes above 2950 feet the maximum operating temperature is de rated 1 F 550 ft 40 to 65 C 40 to 149 F with a maximum temperature gradation of 20 C per hour 20 to 80 non condensing with a maximum humidity gradation of 10 per hour 5 to 95 non condensing with a maximum humidity gradation of 10 per hour 0 25 G at 3 200 Hz for 15 min Operating One shock pulse in the positive z axis one pulse on each side of the system of 31 G for 2 6 ms in the operational orientation Six consecutively executed shock pulses in the positive and negative x y and z axes one pulse on each side of the system of 71 G for up to 2 ms 16 to 3048 m 50 to 10 000 ft Note For altitudes above 2950 feet the maximum operating temperat
13. Management Ports s Configure network parameters for the Ethernet management ports on the RAID controller module s if you want to manage the storage array using out of band management connections View Enable Premium Features View available premium features and enable them requires a feature key 4 premium feature is a special Function that may not be available in the standard configuration of the storage array The Setup tab includes tasks such as Blink Storage Array selection which allows the user to turn on the indicator lights of the storage array to identify it physically Rename Storage Array allows for the storage array to be renamed so it can be easily identified in the storage management software Set a Storage Array Password prompts the user for a new password for the storage array to prevent unauthorized users from making configuration changes Configure Storage Array is a key task which allows the user to create disk groups virtual disks and hot Spare physical disks Map Virtual Disks option provides for the user to map virtual disks to hosts to that the virtual disk can used for I O operations As mentioned previously this can also be accomplished from the Mappings tab Save Configuration selection users can save their configuration parameters in a file to use for restoration or replication 26 Technical Guide Book for PowerVault MD3200MD3220 It is important to note that many tasks can also be accessed from the p
14. al ye ees cm I IRAD HLI TE 66 S si Fy i 7 4 Capacity 115733 GB Eiin a RAIT imi lfa mam sus maj EE 557 550 ay Piedi type GD Hard Disk Physical Disk Ug an spir Th Physical Dirk Type Ge Sas EE 51 00 Te Enclosure loss protection Ma ie GRATO 1 720 08 EE AA O Gi Secuniy Capable Ho fg 7 ean ss ma E Secure Ho 7 557 750 60 P r uP Cune 0wncr HALD Controle Modas m aloi I Airaa yinteal dicks and nee capacity Wirttal Disk Cape bg i 110133 GB Associated physkal disks preseet in piere arder LLLE 27 Technical Guide Book for PowerVault MD3200MD3220 The final tab is the Support tab which provides a central location when storage array recovery support information or a description of the storage array components are needed Figure 22 MD Storage Manager Support Tab Mercury_SAS PowerVault Modular Disk Storage Manager Array Management Joey POWERVAULT MODULAR DISK STORAGE MANAGER Storage Array View Mappings Disk Group Virtual Disk RAID Controller Module Physical Disk Advanced Help 803 Bal al el Mercury SAS Y STE ee A OE SUpport Storage Array Support Common Support Tasks Gather support oracion Save all information about the storage array such as profile and event log information to a file so that you can send it to a technical support representative Es view Storage Array Profile H view a detailed description of all components and properties of the storage array toi Download Firmware D
15. al Specifications a rr ii 37 Figures AQUEL COnTolerACNTEcCtU Eesi oO 5 Figure 2 MD3200 RAID Controller Module View LEDS oia ias 6 Ficure S MD3200 apnd MD3220 DIMENSIONS ainia orar arnie e a Eaa 9 Figure 4 MD3200 Front View and Features ccccccccccseeeeeeeeeeeeeeeeeeeeeeeeeeseeeteteneeeeueeettsaneeney 9 Figure 5 MD3200 Front Panel INICIOS A A AAA aaa 10 FIQUre 6 MD3220 Front View and Features anssovpdus dorar riada 10 Technical Guide Book for PowerVault MD3200MD3220 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Figure 12 Figure 13 Figure 14 Figure 15 Figure 16 Figure 17 Figure 18 Figure 19 Figure 20 Figure 21 Figure 22 MBS226 Front Pane Indica lO rca casara 11 MD3200 and MD3220 Front Bezel Feature and IndicatorS occcccccccccncocccnr ron 12 MBD3200a md MB3220 REAT VIEW cti NE REA AES 13 Power SUDDIYINGICatOr COGS srair TASA EAA 13 Hard Drive Indicators iachudes HDD and SS suicida 16 EXDaMS ON ANA CaO MING aia aa oi 17 Min oho CaDIE Trant ON picando ileso id 18 MD Storage Manager Enterprise WINGOW lt a es 20 Mb Storage Manager Setup TaD retina iia 21 MD Storage Manager Array WINdOW cccccccceseeeeeeeeeeeeeeeeeeeteeeeeeeeeetteeneeeeneeetenags 22 MO Storage Mana der Loca Taiana aaa 23 MD Storage Manager PAYsICA Fabiana 24 MD Storage Manager Mappings Taba AAA a 25 ME Storage Manager Setup TaD ars 26 MD Storage Manager Access to Task Sita 27 MD Storage Manag
16. band management e One PS 2 serial interface for service Figure 2 MD3200 RAID Controller Module View LEDs 6Gb SAS port for 6Gb SAS ports for 1Gb Ethernet port PS 2 serial port drive expansion host connectivity for management for service MD3A4 Series 545 OUT LED Term ctor icon General Behavior OFF No power applied ON Power is applied Technical Guide Book for PowerVault MD3200MD3220 LED Term General Behavior OFF The controller is operating normally Controller Fault ON The controller has defaulted Indicates the location of the enclosure within Controller Identifier the system Fi OFF The battery is operating normally Battery Fault ON The battery has defaulted or is missing A button which allows the user to reset the default MD Storage Manager password Password Reset Switch OFF No data is in cache Cache Active ON Data is in cache Technical Guide Book for PowerVault MD3200MD3220 Table 1 Selected Controller Features Automated I O path protection with host based One or more virtual disks per disk group multipath failover drivers Automatic drive failure detection and rebuild Up to 256 virtual disks using a global hot spare drive Integrated storage partitioning snapshot and Dynamic disk group expansion virtual disk copy functionality RAID levels 0 1 5 6 10 Dynamic virtual disk expansion Greater than 2TB virtual disk size support Dynamic RAID level migration Smart battery a
17. covery Guru provides valuable troubleshooting assistance by diagnosing storage array problems and determining the appropriate procedure to use for recovery The Recovery Guru displays a summary list of storage array problems detailed information about a selected problem and recovery steps to follow for the selected problem 28 Technical Guide Book for PowerVault MD3200MD3220 Working with Physical and Logical Disks Disk Group Configuration A disk group is a set of physical disks that the controller logically groups together to provide one or more virtual disks to a host Each disk group is comprised of the same drive technology i e SAS near line SAS or SSD and has an assigned RAID level While multiple RAID levels can be intermixed in a single MD3200 series storage array each disk group has a single RAID level The number of physical disks that make up a disk group can be selected manually or automatically When using the MD Storage Manager software s automatic configuration option disk groups will be configured balancing the load across as many physical disk channels and physical disk modules as possible This ensures maximum protection and performance MD Storage Manager software also provides the ability to dynamically add additional physical disks to existing disk groups Existing virtual disks are then re striped across all physical disks in the newly expanded disk group This takes place while the disk group and all i
18. disk The system s logical partitioning combined with its configuration capabilities enables administrators to choose from a range of virtual disks with different characteristics to meet a server s exact needs for a given 31 Technical Guide Book for PowerVault MD3200MD3220 application A given host can concurrently have virtual disks with different capacities different RAID levels and different physical disk types This flexibility enables hosts with different capacity performance or data protection demands to effectively share a single storage array Snapshot The MD3200 series of arrays Snapshot functionality provides an additional level of data protection and the means to improve production data utilization Snapshot enables non production servers to access an gt up to date copy of production data for a variety of applications including backup application testing or soL Snapshot data mining while the production data remains Virtual Virtual Disk online and user accessible Disk A snapshot is a point in time image of a source virtual disk It is the logical equivalent of a complete physical copy but is created much more quickly and requires less disk soace Snapshots appear and function as standard virtual disks they are host addressable and can be read written to or copied Snapshot Repository Phvsical Logical Snapshot uses an innovative copy on write technology to maintain the logical snapshot
19. e enclosure power is on Lights blue during normal operation and when the management software is identifying the enclosure Blinks blue when the management software Is identifying the enclosure or when the system identification button is pressed Lights amber when the enclosure is turned on or is reset Blinks amber when the enclosure is in the fault state The power LED lights when at least one power supply is supplying power to the enclosure 11 Technical Guide Book for PowerVault MD3200MD3220 Not Applicable This LED has no use in the MD3200 or MD3220 System Identification The system identification button on the front control panel Button can be used to locate a particular enclosure within a rack When the button is pushed the system status indicators on the control panel and the RAID controllers blinks blue until the button is pushed again Hard Drives MD3200 Up to 12 SAS hot swappable drives MD3220 Up to 24 2 5 inch SAS hot swappable drives Not Applicable This switch has no use on the MD3200 or MD3220 Figure 8 MD3200 and MD3220 Front Bezel Feature and Indicators 12 Technical Guide Book for PowerVault MD3200MD3220 Figure 9 MD3200 and MD3220 Rear View RAID Controller Module 0 RAID Controller Module 1 Power Supply Cooling Fan Modules Figure 10 Power Supply Indicator Codes 13 Technical Guide Book for PowerVault MD3200MD3220 Table 4 Power Indicator Description
20. er Support admira pa 28 Technical Guide Book for PowerVault MD3200MD3220 Product Overview The PowerVault MD3200 Is the next generation series of directly connected shared SAS arrays replacing the MD3000 product in the product portfolio The MD3200 series of arrays provides vastly superior functionality over its predecessor and is industry leading in the areas of performance flexibility and scalability The MD3200 series of arrays were designed with performance in mind Each controller is equipped with four 6Gb SAS ports providing total aggregated bandwidth of 4 000MB s of throughput for a dual controller system which is 4X the throughput of the MD3000 and the most competitive products in the external RAID SAS array market For small block random access applications like databases the MD3200 series is capable of performing over 2X the IOP performance of the MD3000 making it a great platform for a wide variety of applications and IT environments When it comes to flexibility the MD3200 series of storage arrays is second to none There are four base offerings to choose from allowing users to best meet their specific IT demands and budgets MD3200 single controller model A single RAID controller in a 2U 12 drive 3 5 HDD enclosure provides the lowest cost with the highest storage capacity offering when using large near line SAS drives MD3200 dual controller model Dual active active controllers in a 2U 12 drive 3 5 HDD enclosure p
21. ghest availability and enables easier reconfigurations and migrations As system configuration data resides on every configured physical disk controllers and or multiple physical disks can be removed or swapped without losing the system configuration Physical disks can be relocated within the storage system to improve channel utilization protection or even migrated as a complete disk group into another storage system In instances all configuration metadata and user data remains intact on the physical disks Global Hot Spares If a physical disk fails in the MD3200 or MD3220 storage array the controller uses redundancy data to reconstruct the data onto a hot spare physical disk The hot spare is automatically substituted for the failed physical disk without requiring user intervention Once the failed drive is replaced the data is then automatically copied back to the new drive The user then has a choice of allowing the hot spare to return to its role as a hot spare drive or become a permanent member of a disk group therefore eliminating the copy back process The replacement drive in this case would then be in an unassigned state This feature may be appealing as it reduces the degraded mode time by avoiding the copy back process The MD3200 and MD3220 storage arrays both support an unlimited number of global hot spare physical disks and each can be a spare for any like technology disk in the array 1 e SAS for SAS near line SAS for near
22. gs Autoconf volz Default Group 1 363 TB Standard Es Es AuboConF oll Default Group 1 363 TB Standard fg AutoConfivol4 LUN Ep Autoconf ol LUN g A Default Group Host WindowsServer E Unassociated Host Port Identifiers The Topology pane shows a tree structured view of virtual disk that are related to the storage partitions Click the plus sign or the minus sign adjacent to a node to expand or collapse the view Users can right click a node to open a pop up menu that contains the applicable actions for that node Views include undefined mappings within the storage array as well as the servers connected to the storage array Once a virtual disk is selected the Defined Mappings pane will provide mapping information pertinent to that node By clicking on the storage array for example the virtual drives associated with the storage array will be listed as well which hosts they are accessible By selecting a host the user can also see a list of virtual disks assigned to it The user can also create mappings by right clicking on a virtual disk in the Topology pane and selecting Partitioning which allows them to create mappings via a Wizard and will quickly create a new single partition A user can also select Define Additional Mappings to define additional mappings This step allows the user to map the virtual disk to additional host of host groups in an existing storage partition 25 Technical
23. he supported MD3200 carrier The front bezel of the system contains a lock A locked bezel secures the system hard drives 15 Technical Guide Book for PowerVault MD3200MD3220 Hard Drive Indicators Figure 11 Hard Drive Indicators includes HDD and SSD 1 hard drive activity indicator green 2 hard drive status indicator green and amber Table 6 Drive Indicator Description Blinks green two times per second Identify drive preparing for removal Of f Drive ready for insertion or removal 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 Blinks green three seconds amber three Rebuild aborted seconds and off six seconds 16 Technical Guide Book for PowerVault MD3200MD3220 Storage Capacity Expansion Both the MD3200 and MD3220 systems are capable of supporting up to 96 total hard drives Adding additional drives past what the base platforms hold is a simple matter of connecting either MD1200 and or MD1220 J BODs to the expansion ports on the MD32X0 Users can mix and match the MD1200 3 5 HDD enclosure and the MD1220 2 5 HDD enclosure in any combination that provides them the best mix of drives for their environment up to a total of 96 drive slots The diagram below shows the proper way to cable J BODs to the MD32X0 storage arrays If using 100 MD1200 enclosures for storage expansio
24. i ZAS ygi g igl DOM gas ne Show Physical Disks a enn I RAID Controller Module in Enclosure 0 Slot 0 Front ER 63 View Enclosure Components a a Y a O O Y O a View Complete RAID Controller Module Proper ERRE Fca gt gt gt 7 Status Or Enclosure O back Current configuration Firmware Versio Appware Version Bootware wersion NYSRAM version HA View Enclosure Component Pending configuration Firmware Version The drop down menu in the Physical pane allows the user select which physical components they would like displayed in the Properties pane 24 Technical Guide Book for PowerVault MD3200MD3220 Next is the Mappings tab which provides an overall view of the host to virtual disk mappings configured on the storage array The Mappings window includes both a Topology pane as well as a Defined Mappings pane Figure 19 MD Storage Manager Mappings Tab ve SAS PowerVault Modular Disk Storage Manager Array Management Ea POWERVAULT MODULAR DISK STORAGE MANAGER Storage Array View Mappings Disk Group Virtual Disk RAID Controller Module Physical Disk Advanced Help ae a e E tir Y Optimal Summary Logical Physical HMappings Setup Support Topology Defined Mappings EE Storage Array SAS Virtual Disk Mame Accessible By virtual Disk Capacity Type Si Undefined Mappin
25. igured and available capacity The Disk Groups amp Virtual Disks area provides basic information on the number of disk groups virtual disks and RAID levels used on the storage array In addition a link is provided to allow the user to view additional disk group and virtual disk information in a non embedded dialog The Hardware Components area provides basic hardware information about the selected storage array such as the number of physical disks media types and if there are any configured hot spare physical disks 22 Technical Guide Book for PowerVault MD3200MD3220 The Hosts amp Mappings area provides information about the number of hosts virtual disk mappings and storage partitions that have been configured There is also a link provided to allow the user to get more detailed information about the hosts and mappings by launching a non embedded dialog The Information Center area provides links to various help related information and tutorials The Logical tab is the second tab accessible on the Array Window and contains two panes the Logical pane and the Properties pane Figure 17 MD Storage Manager Logical Tab SAS PowerVault Modular Disk Storage Manager Array Management Sele TN POWERVAULT MODULAR DISK STORAGE MANAGER Storage Array View Mappings Disk Group Virtual Disk RAID Controller Module Physical Disk Advanced Help _ S m 3 aja a s Summary Logical Physical Mappings Setup Support Logical _ Prope
26. lar Disk Storage Manager software to use settings you define through your operating system 4 Launched Array Management Window for MD32x _13_14 There are two ways to select an array to manage from the Enterprise Window This includes Clicking the Manage a Storage Array in the Setup tab then select the desired storage array or go to the Devices tab and double click on a storage array Either of these two options will open the Array Window for the selected storage array Array Window The Array Window provides all of the functions to configure maintain and troubleshoot any individual storage array Multiple Array Windows can be open at the same time to manage multiple storage arrays if the need to do so every arises The Array Window provides a task oriented user interface and Is designed to be both informative and intuitive From any of the six primary tabs located on the Array Window Summary Logical Physical Mapping Setup and Support users can simply make changes on the fly to quickly adapt their array to meet their needs 21 Technical Guide Book for PowerVault MD3200MD3220 Figure 16 MD Storage Manager Array Window 77 SAS PowerVault Modular Disk Storage Manager Array Management AE Summary META A EOL E ii Storage Array Profile a Total Capacity 16 359 TB Storage Array status is optimal ly Disk Groups 0 Eg Operations in Progress O S wee fi Virtual Disks 0 D E Configured i Hardware Co
27. levels can coexist in a single storage system Disk groups are comprised of either SSD or SAS drives A given disk group cannot have both SSD and SAS drives Up to 256 virtual disks LUNs per storage array Each virtual disk can support 8 snapshots with a maximum of 128 snapshots per storage array 38
28. line SAS and SSD for SSD Generally speaking the physical disks that are assigned as a hot spares should have a capacity that is equal to or greater than the capacity of the largest physical disk in the storage array Host A Host B Storage Partitioning The MD3200 series of arrays Storage Partitioning feature enables a single storage array to be logically partitioned and function as up to 8 virtual arrays A storage partition is a logical entity consisting of one or more virtual disks that are accessed by a single host or shared among a collection of hosts that are part of a host group A storage partition is created when one or more virtual disks are mapped to an individual host or host group This virtual disk to LUN mapping allows you to define what host or host group will have access to a particular virtual disk in your storage system Hosts and host groups can only access data through assigned virtual disk to LUN mappings Partition access is maintained at the controller level ensuring complete data integrity in multi host multi OS environments The virtual disk to LUN mapping implementation creates valuable flexibility for the storage administrator as any available virtual disk can be mapped to any attached server So while the individual servers see a virtual array that consists of only their LUNs virtual disks the virtual disks can be intermixed throughout the storage system within one or more disk groups unmapped virtual
29. llows the controller to monitor Dynamic capacity expansion different parameters on the cache offload batteries such as state of charge and state of health Dynamic segment size migration Dynamic defragmentation Up to 30 hard disk drives per disk group in a RAID5 Non disruptive firmware upgrades and RAID6 and up to 96 drives in a RAIDO or RAID1 Chassis Dimensions and Weight The PowerVault MD3200 and MD3220 enclosures use a rack mount 2U chassis Table 2 Detailed Dimensions mm Model Number with with bezel bezel remain ms 446 3 eT 561 0 o ma o B i me je ju n n a Technical Guide Book for PowerVault MD3200MD3220 Figure 3 MD3200 and MD3220 Dimensions Bezel or Outer Most Feature he EIA Rack Flange Y Ml SIDE VIEW PowerVault MD3200 Weight maximum configuration 29 3 kg 64 6 Ib PowerVault MD3220 Weight maximum configuration 24 2 kg 53 4 lb Front View and Features Figure 4 MD3200 Front View and Features 12 3 5 or 2 5 SAS drives CLL TPP AAA TEP AE Technical Guide Book for PowerVault MD3200MD3220 Figure 5 MD3200 Front Panel Indicators Figure 6 MD3220 Front View and Features 24 2 5 SFF SAS drives 10 Technical Guide Book for PowerVault MD3200MD3220 Figure 7 MD3220 Front Panel Indicators Table 3 MD3200 and MD3220 Front Panel Feature Description Enclosure status LED Power LED The enclosure status LED lights when th
30. more effective manner Initial set up is also much easier than the previous product with the addition of improvements in the Modular Disk Storage Manager 6Gb Serial Attached SCSI SAS 2 0 SAS provides a scalable point to point topology capable of addressing storage connectivity at many levels As SAS enters its second generation the standard is evolving to enable better bandwidth utilization easier management mechanisms and network robustness 6Gb s SAS 2 0 not only doubles the current data transfer rate it provides standardized zoning self discovery and self configuration methods to expanders This makes larger and more complex topologies easier than ever to implement Technical Guide Book for PowerVault MD3200MD3220 Key features of SAS 2 0 e 6Gb s SAS Signaling doubles the transfer rate from 3Gb to 6Gb e DFE Decision Feedback Equalization increases cable limit to 10m 2 4 Is typical e Supports SAS mini connectors SFF 8088 and SFF 8087 e SSC Spread Spectrum Clocking ease of design implementation reduce peak amplitude of radiated emissions e Supports SED Self Encrypting Drive with Instant Secure Erase e Delivers 2 generation SAS Discovery e Standardized Zoning e Expanded to 256 e Discovery executed by SAS Expanders e Reduces time to discover large topologies Figure 1 Controller Architecture 32 lane 8 port PCI E Switch X4 X24 x4 Alt Ctrl Drives Alt Ctrl The RAID co
31. mponents a RAID Controller Modules Information Center Y Status Y Capacity Disk Groups amp Virtual Disks UG Enclosures z online Help a Hosts amp Mappings Bu Physical Disks Storage Concepts Tutorial Media Tinas Configured Hosts 1 Planning Your Configuration Interface Types PP Host to Yirtual Disk Mappings O Configuring Your Storage Array Au Hot Spare Physical Disks 5 Storage Partitions Essential Terms to Know In use O Standby 0 Used Available The Summary tab shown above provides administers with a quick look at all the pertinent information regarding the selected MD3200 or MD3220 storage array as well as links to various management tasks These include A Status area which indicates whether the storage array is in an optimal state whether there are any long running operations in progress with the ability to view the operations and whether alert notifications have been set If the array is in a non optimal state a link is provided to launch the Recovery Guru The Recovery Guru provides valuable troubleshooting assistance by diagnosing storage array problems and determining the appropriate procedure to use for recovery The Recovery Guru displays a summary list of storage array problems detailed information about a selected problem and recovery steps to follow for the selected problem The Capacity section provides an indication of the total capacity available on the storage array and the conf
32. n on an MD3200 a total of seven MD1200 enclosures can be added to achieve a total of 96 HDD If using 100 MD1220 enclosures for expansion on an MD3200 a total of three MD1220 enclosures can be added Adding three MD1220 enclosures provides a total of 84 HDD slots If using 100 MD1220 enclosures for storage expansion on an MD3220 a total of three MD1220 enclosures can be added to achieve a total of 96 HDD If using 100 MD1200 enclosures for expansion on an MD3220 a total of six MD1200 enclosures can be added to achieve a total of 96 HDD It is important to note that the older 3Gb SAS J BODS MD1000 and MD1120 cannot be used as expansion enclosures on the MD3200 or the MD3220 Figure 12 Expansion and cabling 17 Technical Guide Book for PowerVault MD3200MD3220 SAS Cables The MD3200 and MD3220 arrays and the MD1200 and MD1220 J BODs standardize on the 6Gb s SAS 2 0 Mini SAS cable SFF 8088 The Mini SAS cable is unique from the SAS cable used with the previous MD3000 array and MD1000 J BOD Figure 13 Mini SAS Cable Transition SAS to SAS Mini SAS to Mini SAS 3Gb Cable 6Gb Cable MD3000 MD3200 MD3220 MD1000 MD1120 MD1200 MD1220 Connectors on both ends of the Mini SAS cable are universally keyed Either end of the cable can be connected to the host MD3200 RAID controllers or J BODs To remove the Mini SAS cable pull the pull tab to release the cable from the connector on the EMM and the host system 6Gb SAS HB
33. ntrollers are the engines or the brains of the MD3200 and MD3220 storage arrays They perform the RAID calculations control the I O movement communicate with the management client store 5 Technical Guide Book for PowerVault MD3200MD3220 the firmware and protect data until it can be written safely to the hard disk drives The MD3200 s architecture is designed to excel in multi host systems environments Its I O system core provides built in hardware XOR for high speed RAID parity calculations enabling it to easily handle very compute intensive tasks Each RAID controller contains 2GB of cache for a total of 4GB of cache In a dual controller configuration which is mirrored with the other controller s cache for high availability In the event of a power failure the controllers are protected with battery assisted persistent cache backup which destages cache to non volatile media for indefinite safe keeping Each controller has a 36 port 6 Gb s SAS expander that provides access to the drives in the MD3200 or MD3220 enclosure The SAS expanders enable each controller to access all of the drive ports creating active active drives loops that provide both controllers redundant access to all attached disk drives Each controller has the following external connections e Four 6Gb SAS ports for host connectivity e One 6 Gb s SAS port for drive enclosure expansion for additional capacity e One Ethernet management ports for LAN out of
34. ollers in the storage array over the I O path of a host Failover Driver This package contains the multi path driver used to manage the 1 0 paths into the controllers in the storage array If there is a problem on the path or a failure of one of the controllers the driver automatically re routes the request from the hosts to the other controller in the storage array 19 Technical Guide Book for PowerVault MD3200MD3220 Enterprise Window The Enterprise Window is the main window that opens when the MD Storage Manager Is initially launched Within the Device tab it provides a view of all of the storage arrays including partially managed storage arrays in the overall management domain It also allows for the automatic or manual addition and removal of storage and provides a view of all the MD arrays including prior generation MD3000 and MD3000i arrays Figure 14 MD Storage Manager Enterprise Window k foe E x po ES PowerVault Modular Disk Storage Manager Enterprise Management POWERVAULT MODULAR DISK STORAGE MANAGER Edit View Tools Help ISAJ E Bal Ad gt Devices fE lt EZT 3 vsT 621BVG1 Name Type Status Management Connections Comment 53 Discovered Storage Arrays cury_SAS ES 12 Optimal In Band detals le Storage Array Mercury_SAS cury_ SCSI E 12 Optimal In Band details 2 Storage Array Mercury_iSCSI cury_iSCSI_simplex E 2 Optimal In Band details le Storage Array Mercury_iSCS
35. ownload RAID controller module firmware RAID controller module NYSRAM physical disk firmware environmental EMM card firmware and EMM configuration setttings Sey View Event Log LJ Use the event log viewer to display a detailed list of storage array events Use the Recover From Failure link if there are problems with your storage array Help s view Online Help Access the online help system E About PowerYault Modular Disk Storage Manager View version and copyright information Gather Support Information selection allows a user to save information about the storage array such as its profile and event log information to a file so that it can be saved and sent it to technical support Storage Array Profile provides a detailed description of all components and properties of the storage array such as the number of physical drives used firmware versions of the controller s which components are running optimally and the number of Snapshots taken Download Firmware option allows the user to download RAID controller module firmware NVSRAM physical disk firmware environmental management module EMM firmware and EMM configuration settings View Event Log will provide a detailed list of storage array events View Online Help is available for detailed instructions on how to accomplish any of the tasks in the Array Window to optimally configure the storage array Recovery Guru If a problem should ever arise with the array the Re
36. p to 8 snapshots per virtual disk and a total of 128 snapshots per system Support for up to 8 simultaneous virtual disk copies per array and a total of 255 copies per system RAID levels 0 1 5 10 and 6 supported Up to 30 physical disks supported per disk group RAID levels 5 and 6 Up to 96 drives in RAID level 0 Up to 96 drives in RAID level 1 10 Local key management for SDE enabled drives One or more virtual disks per disk group Up to 256 virtual disks LUNs per array Dynamic capabilities support on the fly reconfigurations Dynamic disk group expansion Dynamic RAID level migration Dynamic virtual disks expansion Dynamic capacity expansion Dynamic segment size migration Dynamic defragmentation Non disruptive firmware upgrades Support for unlimited hot spares MD3200 Series Storage Manager Software Packages The MD3200 series Storage Manager software contains the following four packages Client This package contains the graphical user interfaces GUI for monitoring and managing the storage arrays It also contains an optional monitor service used to send alerts when there is a critical problem with the storage arrays Utilities This package contains several providers to simplify integration with Microsoft tools VSS and VDS and integration to 3 party management tools that take advantage of SMI S protocols Agent This package contains software that allows a storage management station to communicate with the contr
37. rovides a high availability and high capacity storage offering when using large near line SAS drives MD3220 single controller model A single RAID controller in a 2U 24 drive 2 5 HDD enclosure provides a low cost high spindle count storage solution that maximizes IOPS when using SSD or 15K 2 5 SAS drives MD3220 dual controller model Dual active active controllers in a 2U 24 drive 2 5 HDD enclosure provides the combination of a highly available storage solution with a high spindle count to maximize IOPS when using SSD or 15K 2 5 SAS drives This series of arrays raises the bar for scalability in the entry level storage space Single controller models are capable of support up to four hosts connected to a single array Dual controller models are capable of support up to four hosts with fully redundant I O data paths or up to eight hosts with non redundant data paths Additional storage capacity can be added up to a maximum of 96 HDD via the MD1200 and or MD1220 enclosures Users can also mix 3 5 and 2 5 enclosures behind their base units in order to achieve the optimal drive tiering that best matches their application needs Within each enclosure users can mix SSD SAS and near line SAS drives maximizing their return on investment In addition to the above mentioned features the MD3200 series offers optional data protection features like snap shots and virtual disk copy services to assist users in protecting their data in a
38. rties gt a A A AI Disk Group Auto Config Group 1 Total Unconfigured Capacity 1 363 TB E ppt uto_Config_Group 1 RAID 5 1 363 TB View Associated Ph sical Components s amp s Auto_Config_Group 2 RAID 5 1 363 TB Status a Optimal ff AutoConfvol2 1 363 TB Auto_Config_Group 3 RAID 5 1 363 TB Capacity 1 363 TB AutoConF ol3 1 363 TB RAID level 5 Oy Auto_Config_Group 4 RAID 5 1 363 TB E AutoConfvol4 1 363 TB Media type A Hard Disk Physical Disk y a Auto _Config_Group 5 RAID 5 1 363 TE Physical Disk Type SAS SAS AutoConfvol5 1 363 TB Enclosure loss protection No E Uy Ds Auto _Config_Group 6 RAID 5 1 363 TE 8 autoConfvol 1 363 TB 3 security Capable 5 po Tel om i E Gy dm Auto _Config_Group 7 RAID 5 1 363 TE IES IA ion The Logical pane provides a tree structured view of the array s disk configurations Clicking the plus sign or the minus sign adjacent to the array will expand or collapse the view These views under the storage array include un configured capacity as well as configured disk groups and their associated virtual disks Snapshots if any can also be viewed from the virtual disk in which they reside The Properties pane provides detailed information about the component selected in the Logical pane The information varies depending on what type of component is selected Information may include whether the component is
39. sks to optimize application performance and or capacity utilization Online Administration The MD3200 series of storage arrays allows primary storage management tasks to be performed while the storage remains online with complete read write data access This allows storage administrators to make configuration changes conduct maintenance or expand the storage capacity without disrupting I O to its attached hosts Online capabilities include Add Free Capacity Capacity Expansion enables the capacity and number of physical disks to be increased for a given disk group Up to two physical disks at a time can be added to existing disk groups with the existing virtual disks then being striped across the full set of physical disks now comprising the disk group Dynamic Expansion This feature enables new drive modules to be added virtual disk groups to be configured and virtual disks to be created without disrupting access to existing data Once a newly created virtual disk is defined the array provides immediate virtual disk availability and is enable it to be instantly mapped and accessed by a host s Dynamic Virtual Disk Expansion This feature allows for the capacity expansion of an existing virtual disk by using the free capacity on an existing virtual disk group And since dynamic virtual disk expansion concatenates combines the new capacity with the original capacity maximum performance and utilization is assured Dynamic RAID Level
40. ts virtual disks remain online and accessible for l O Disk Group A Disk Disk Disk Disk 1 2 3 4 The selection of the RAID configurations is equally critical for each application to meet the desired data availability performance or capacity requirements And like physical disk types and configuration settings the MD3200 series of arrays support the intermixing of RAID configurations to provide maximum flexibility and utilization RAID 5 is generally considered the best balance of cost performance and reliability The table below outlines the tradeoffs of the various supported RAID configurations 29 Technical Guide Book for PowerVault MD3200MD3220 Table 7 RAID Configuration Support Physical disks operated Physical disks operated independently with data independently with data and parity blocks and dual parity blocks distributed across all are distributed across all physical disks in the physical disks in the Data is striped Data Is mirrored across multiple to another physical disks physical disk Same advantages as RAID 5 but with better data protection Two hard drives can fall without losing access to data Good for reads small IOPS many concurrent IOPS and random Os Parity utilizes small portion of raw capacity Performance due Performance as to parallel multiple requests operation of the can be fulfilled access simultaneously No redundancy Overhead on writes will One physical disk oo are
41. ull down menus across the top storage Subsystem View Mappings Array Logical Drive Controler Drive Adwanced Help or by going to the Logical Physical or Mappings tabs in the Array Window and right clicking on the appropriate object i e storage array virtual disk drive controller etc For example right clicking on an array provides the same options as clicking on the Setup tab or the top pull down menus options Figure 21 MD Storage Manager Access to Tasks Fe 8 POWERVAULT MODULAR DSEK STORAGE MANAGER cage tray View Mapping Gack gos tul Dick RAR Controle Mide epica ud piaia Ed g0 Sy al a e Snowmass SAS 12 14 Y Logica Re Mappings Situp Tuppi E storage Array arenas A 11 Disk Group rye Total Uncorfigured Capacity 149 TH View Adsockobed Haea Components i a CIR es herria Piya Cimpina B be d RAL iy Add Free Capacity Physical Desks a f miig El Hard Desk Physical Disk Frical Disk Type i AS aclorune loss protection Ho Secuii Capable Ho Secta Ma Current owner RAID Controller Mode in clot 1 Associated virtual disks and nee capacity Vinal kk Caparity i 135 733 GB Assoclnied phyeiral dicks present in plece order Pts E POWERVYALLT MODULAR DISK STORAGE PLAN ATER Borage Array Ving Mepa Dedo Yrtvel Disk WAS Centrale Module Phirocal fish Advanced Hele _ si 3 wale Ur BACA fo us De a pra Coros LE GRADO 195 350 can Shales optim
42. ure is de rated 1 F 550 ft 16 to 10 600 m 50 to 35 000 ft G2 or lower as defined by ISA S71 04 1985 37 Technical Guide Book for PowerVault MD3200MD3220 Configuration Guidelines General Configuration Rules The MD3200 and MD3220 s extensive configuration flexibility enables customized performance tuning maximum capacity utilization and the highest data protection to support application servers with vastly different requirements A single storage array can concurrently support multiple RAID levels 0 1 5 10 and 6 multiple drive technologies SSD SAS and near line SAS multiple and various disk group sizes and one or more virtual disks per disk group Below are general configuration rules for MD3200 series of arrays Up to 8 direct attached servers with single I O paths to a dual controller storage array Up to 4 direct attached servers with redundant I O paths to a dual controller storage array Up to 96 total drives consisting of SSD SAS and or near line SAS drives per storage system SSD drives are limited to a single shelf 12 drives for a MD3200 or 24 drives for a MD3220 MD1200 and or MD1220 storage enclosures can be add to a MD3200 or MD3220 storage array for expansion up to 96 total hard drives Up to 30 hard disk drives per disk group in a RAID 5 and RAID 6 Up to 96 hard disk drives per disk group in a RAID1 10 Each disk group can be configured as RAID level 0 1 5 10 or 6 Disk groups with different RAID
43. virtual disk while minimizing disk utilization When the snapshot is taken the controller suspends l O to the source virtual disk for a few seconds while it creates a new physical virtual disk called the repository virtual disk to store snapshot metadata and copy on write data When a data block on the source virtual disk is modified a copy on write occurs copying the contents of blocks that are to be modified into the repository virtual disk for safekeeping This repository virtual disk combined with the original source virtual disk creates the logical snapshot virtual disk Since the only data blocks that are physically stored in the repository virtual disk are those that have changed since the time of the snapshot the snapshot technology uses less disk space than a full physical copy The repository virtual disk is typically 20 percent of the base virtual disk but will vary depending on the amount of changes to the data The longer a snapshot is active the larger the repository is needed Virtual disk snapshot provides notification when the repository virtual disk nears a user specified threshold a percentage of its full capacity And at any time the volume expansion feature can be used to dynamically expand the repository virtual disk Virtual Disk Copy The MD3200 series of arrays Virtual Disk Copy functionality provides administrators with another tool to effectively manage information growth and maximize the utilization of the
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