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Acer DAC960PG Network Card User Manual

1. there is not guarantee that interference will not occur in a particular installation If this equipment does cause interference to radio or television equipment reception which can be determined by turning the equipment off and on the user is encouraged to try to correct the interference by one or more of the following measures 1 Reorient or relocate the receiving antenna 2 Move the equipment away from the receiver 3 Plug the equipment into an outlet on a circuit different from that to which the receiver is powered If necessary the user should consult the dealer or an experienced radio television technician for additional suggestions All external connections should be made using shielded cables A Caution Only equipment certified to comply with Class B computer input output devices terminals printers etc should be attached to this equipment Any changes or modifications to the equipment by the user not expressly approved by the grantee or manufacturer could void the user s authority to operate such equipment Manual No 775012 E 1 Declaration of Conformity FE Declaration of Conformity Manufacturer s Name Manufacturer s Address Declares that the product Product Name Model Numbers Year of Manufacture Mylex Corporation 34551 Ardenwood Blvd Fremont CA 94555 3607 USA 1 2 and 3 Channel Ultra SCSI RAID Controller DAC960PG DAC960PJ 1998 Conforms to the following Product Spe
2. Cache ssseeceeseseeeeeeeeen A 5 Battery Backup Capacity sse A 5 Mainternarice EE A 6 Removing the Battery Backup Module esee A 6 Functional Description emm A 7 General Operational Description sese A 7 Tee TEEN A 7 Battery and Charge Circuit ssseeeeen A 8 Recycling the Battery A 8 BBU Specifications AAA A 9 Onboard Balttery ricette He dz dee tee ette A 9 Battery Charge Life A A 9 External Battery isvann a ee ette A 9 Module Dimensions esee A 9 Environmental 5 aee enu eet ES A 9 Appendix B DAC960PG and DAC960PJ Specifications B 1 General Hardware Specifications sse B 1 DAGO60PQG iile MD ERE ER MS B 1 DACIGOP KEE B 2 Physical and Environmental Specifications B 3 Appendix C Error Messages oed ie etsi Du Doo Do dix qus C 1 Start up Error Messages AAA C 1 Drive Check Error Messages A C 1 Installation ABOT aia eel an et Ene couple deed C 2 NVRAM Error ui dee Sie eet Pec ERR Recepta priced undi C 3 System Reboot or Power Down Messages see C 3 Appendix D Enclosure Management 1 sss D 1 Introduction ee PINO D 1 EE NL en LI ME een CENT D 1 vi DAC960PG and DAC960PJ Installation Appendix E Regulatory Information SA pede ee EUR toe Sele LEE a eet E 1 Class B Compliance
3. System drives are presented as available disk drives each with a capacity specified by the Mylex RAID controller G 10 DACO960PG and DAC960PJ Installation Guide Glossary Logical Drive States A logical system drive can be Online Critical or Offline Notice that the term online is used for both physical and logical drives LVD Low Voltage Differential a form of SCSI signaling introduced with Ultra2 SCSI Fast40 SCSI uses data high and data low signal lines to increase transmission distances over those of single ended conventional SCSI signaling lines LVD allows for cable lengths of up to 12 meters approximately 39 feet with up to 15 devices LVD also lowers noise power usage and amplitude LVD differs from conventional differential signaling in that only positive and negative values are distinguished not voltage levels Other advantages are that LVD devices consume less power and can sense single ended devices on the bus and revert to single ended signaling Devices need to be Ultra2 SCSI LVD devices in order to take advantage of the LVD signaling Mylex AcceleRAID eXtremeRAID and DAC FL controllers are LVD controllers Megabit A million bits used as a common unit of measure relative to time in seconds as an expression of a transmission technology s bandwidth or data transfer rates Megabits per second Mbps is a frequent measure of bandwidth on a transmission medium Megabyte SC 1 048 576 bytes One mega
4. There are no manual procedures for battery conditioning or preconditioning to be performed by the user Set up Enabling the Write Back Cache The write back cache is enabled by toggling the write back write through mode switch The write back write through mode switch is accessed in the Onboard Configuration Utility RAID EzAssist or in GAM Refer to the RAID EzAssist Configuration Utility User Reference Guide or the Global Array Manager Client Software Installation Guide and User Manual for instructions on how to examine and change the mode switch Battery Backup Capacity Battery backup capacity is defined as the maximum duration of a power failure for which data in the cache can be maintained by the battery The BBU s backup capacity varies with the memory configuration installed on the DAC960PG or DAC960PJ Battery backup capacity can be reasonably expected according to Table A 1 Table A 1 BBU Capacity vs Cache Memory Configuration Capacity Mem Type Battery Backup Duration Typical Minimum 4 MB EDO ECC RAM 72 hours 40 hours 8 MB EDO ECC RAM 40 hours 20 hours 16 MB EDO ECC RAM 68 hours 28 hours 32 MB EDO ECC RAM 30 hours 14 hours 64 MB EDO ECC RAM 35 hours 23 hours 128 MB EDO ECC RAM 20 hours 12 hours Manual No 775012 A 5 Maintenance Maintenance No end user maintenance is required on the BBU It is recommended however that the battery charge level be periodically checked using the Ga
5. any single disk drive is removed or fails the data on it can be reconstructed using the data on the remaining disk drives The parity data may exist on only one disk drive or be distributed between all disk drives in a RAID group Parity Check A function used to verify the integrity of data on a system drive It verifies that mirror or parity information matches the stored data on the redundant arrays If the parity block information is inconsistent with the data blocks the controller corrects the inconsistencies See also Consistency Check PCI Peripheral Component Interconnect a standardized architecture that provides a high speed data path between peripherals and the CPU PCI is a high performance backplane interface expansion slot architecture found on PCs Macintoshes and UNIX workstations PCI cards are portable across hardware platforms with the help of various software drivers PCI Hot Plug A feature that allows for the printed circuit board PCB to be replaced without powering down the entire system an essential feature in newer PCI based PCs Mylex DAC960PG DAC960PJ AcceleRAID and eXtremeRAID products are all PCI Hot Plug compatible See also Hot Plug Manual No 775012 G 13 Physical Device Any device connected to some kind of hardware For example SCSI disk fibre disk network disk RAM disk etc Physical Disk Drive A single hard disk drive Each physical disk drive is assigned a unique identification
6. attente Cm edited E 1 Declaration of Conformity sssssseeeeeeeennennenee E 2 Declaration of Conformity sss E 3 Community of Europe sessssseeeeeeeen eene ennemis E 4 Underwriters Laboratories Listing and Warning E 5 GIOSSATY oo testae e in dtu p beides G 1 Manual No 775012 vii viii DAC960PG and DAC960PJ Installation Chapter 1 Introduction This chapter covers Product description Standard package contents User supplied items Figure 1 1 DAC960PG or DAC960PJ Disk Array Controller Product Description The Mylex DAC960PG and DAC960PJ controllers are 32 bit PCI to Ultra SCSI RAID controllers designed for high performance file servers With up to 3 Ultra SCSI drive channels and support for a cache memory battery backup full length card models only these controllers provide the speed and functionality required by high demand server platforms Manual No 775012 1 1 Product Description Controller Features and Functions Features of the DAC960PG and DAC960PJ controllers include Ultra SCSI drive channels that support RAID levels 0 1 3 5 0 1 10 30 and 50 Single Ended Wide Ultra SCSI Fast 20 drive support High performance RISC processor and EDO ECC DRAM cache 4MB to 128MB for high speed fault tolerant I O transfers 512KB 8 bit flash EEPROM for BIOS and code supports future enhancements through firmware upgrade
7. be displayed Pressing any key will restart the system BIOS options BIOS enabled CD ROM boot disabled 2 GB drive geometry The system will restart Press any key to continue CD ROM Boot Disable or Enable The default for this option is for the CD ROM boot to be disabled e g the system will boot from a hard drive even if there is a bootable CD installed If the CD ROM boot option is enabled and if a bootable CD is installed in the CD ROM drive the system can boot from the CD If the CD ROM boot option is enabled the CD ROM will take priority over the disk drives For example under MS DOS the disk drive that is normally Drive C will become Drive D All subsequent drive IDs will similarly be moved down 4 2 DAC960PG and DAC960PJ Installation Controller Start up Enable 8GByte or 2GByte Drives This setting affects how the BIOS reads the disk drives for the boot partition Drive geometries can be toggled between 8 GB and 2 GB The default is 2 GB When the drive geometry is changed the drive should be formatted at the operating system level AN Caution Changing this setting after data has been stored will make the data unreadable If you have already configured your array and have stored data you should not change this setting BIOS options BIOS enabled CD ROM boot disabled WARNING Changing drive geometry may lead to non bootable system drives and or loss of data Proceed anyway V
8. of this PRODUCT you should contact the per son or company from which you purchased it That person or company may be able to solve the problem and if not will be able to contact us for technical assistance or repair If it is determined that the PRODUCT must be returned to MYLEX for repair or replacement contact MYLEX s Technical Support Department at 510 608 2400 before it is returned Each returned item must have a separate Return Merchandise Authorization RMA number provided by MYLEX The following rules apply to all returned items 1 The PRODUCT must be returned either in its original packaging or in other packaging which is appropriate for the PRODUCT and the manner of shipment and the RMA number must be displayed prominently on the outside of each such package 2 If a PRODUCT is determined to be ineligible for warranty service the customer will be notified before any fur ther action is taken with the PRODUCT 3 MYLEX will not be responsible for any loss or damage to property shipped with the RMA PRODUCT not origi nally sold by MYLEX e g coprocessor chips peripheral boards memory modules enclosures power supplies or any other accessories or attached items 4 Any item returned to MYLEX without a valid RMA number will be returned to the shipper Products shipped to MYLEX must be shipped or mailed at the shipper s risk freight prepaid to the address below Mylex Corporation 34551 Ardenwood Blvd Fremont Califor
9. than is possible with individual drives This level does not provide any redundancy Level 1 Drives are paired and mirrored All data is 100 percent duplicated on a drive of equivalent size Level 3 Data is striped across several physical drives Maintains parity information which can be used for data recovery Level 5 Data is striped across several physical drives For data redundancy drives are encoded with rotated XOR redundancy Level 0 1 Combines RAID 0 striping and RAID 1 mirroring This level provides redundancy through mirroring JBOD Sometimes referred to as Just a Bunch of Drives Each drive is operated independently like a normal disk controller or drives may be spanned and seen as a single drive This level does not provide data redundancy Level 10 Combines RAID 0 striping and RAID 1 mirroring spanned across multiple drive groups super drive group This level provides redundancy through mirroring and better performance than Level 1 alone Level 30 Data is striped across multiple drive groups super drive group Maintains parity information which can be used for data recovery Level 50 Data is striped across multiple drive groups super drive group For data redundancy drives are encoded with rotated XOR redundancy Note The host operating system drivers and software utilities remain unchanged regardless of the level of RAID installed The controller makes the physical configuration
10. 5 and RAID 0 1 Note The standby rebuild will only happen on the SAME DAC960 controller never across DAC960 controllers During the automatic rebuild process system activity continues as normal System performance may degrade slightly during the rebuild process Manual No 775012 G 19 To use the standby rebuild feature you should always maintain a standby SCSI disk in your system When a disk fails the standby disk will automatically replace the failed drive and the data will be rebuilt The system administrator can disconnect and remove the bad disk and replace it with a new disk The administrator can then make this new disk a standby The standby replacement table has a limit of 8 automatic replacements in any session from power on reset to the next power off reset When the limit of 8 is reached and a disk failure occurs the standby replacement will occur but will not be recorded in the replacement table To clear the standby replacement table reboot the system from a DOS bootable floppy run the configuration utility and select the option view update configuration from the main menu A red box labeled Drive Remap List will be displayed Selecting the box will allow you to continue You should save the configuration without making any changes and exit the configuration utility This will clear the replacement table You may now proceed to boot your system and continue normal operations In normal use the rep
11. Class B product In a residential environment this product may cause radio interference in which case the user may be required to take adequate measures Achtung Dieses ist ein Ger t der Funkst rgrenzwertklasse B In Wohnbereichen k nnen bei Betrieb dieses Ger tes Rundfunkst rungen aufreten in welchen Fallen der Benutzer f r entsprechende Gegenma nahmen verantwortlich ist Avertissement Cet appareil est un appareil de Classe B Dans un environnement r sidentiel cet appareil peut provoquer des brouillages radio lectriques Dans ce cas il peut tre demand l utilisateur de prendre des m sures appropri es E 4 DAC960PG and DAC960PJ Installation Regulatory Information Underwriters Laboratories Listing and Warning MYLEX CORP I E E 32JK File E178007 LISTED WARNING This controller is furnished with a nonvolatile RAM NVRAM chip that uses a sealed lithium battery crystal module Replace the module only with the same or equivalent type recommended by the manufacturer Dispose of the used battery crystal module according to the manufacturer s instructions Never incinerate a battery as it could explode and cause serious injury Manual No 775012 E 5 Underwriters Laboratories Listing and Warning E 6 DAC960PG and DAC960PJ Installation Glossary AcceleRAID The AcceleRAID family features high performance cost effective Ultra SCSI Ultra2 SCSI LVD and Ultra 160 SCSI to PCI RAID controllers an
12. LSI Logic Corporation Other names that are trademarks may be used herein for the purpose of identifying the products or services of their respective owners Unless otherwise noted companies names and data used in examples herein are fictitious Our Policy Although reasonable efforts have been made to assure the accuracy of the information contained herein this publication could include technical inaccuracies or typographical errors Mylex Corporation expressly disclaims liability for any error in this information and for damages whether direct indirect special exemplary consequential or otherwise that may result from such error including but not limited to loss of profits resulting from the use or misuse of the manual or information contained therein even if Mylex Corpora tion has been advised of the possibility of such damages Any questions or comments regarding this document or its contents should be addressed to Mylex Corporation at the address shown on the cover The following paragraph does not apply to the United Kingdom or any country where such provisions are inconsistent with local law MYLEX CORPORATION PROVIDES THIS PUBLICATION AS IS WITHOUT WARRANTY OF ANY KIND EITHER EXPRESS OR IMPLIED INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE Some states do not allow disclaimer of express or implied warranties or the limitation or exclusion of liability for
13. MB Optional 8 16 32 64 or 128 MB Write Selectable Write Through or Write Back Error Protection Error Correction Code ECC ROM Type Flash EEPROM 512K x 8 UO Processor Embedded Intel i960 RP 32 bit bus Transfer Rate Up to 133MB second Mylex BA 81C15 one per channel Data Rate Up to 40MB second when using Fast Wide 16 bit mode B 1 General Hardware Specifications DAC960PJ Controller CPU Memory Cache Firmware PCI SCSI DAC960PJ Intel i960 RD RISC 32 bit microprocessor 66MHz EDO ECC RAM 60ns 72 pin SIMM n x 40 Use only Mylex supplied SIMMS Minimum 4 MB Optional 8 16 32 64 or 128 MB Write Selectable Write Through or Write Back Error Protection Error Correction Code ECC ROM Type Flash EEPROM 512K x 8 UO Processor Embedded Intel i960 RD 32 bit bus Transfer Rate Up to 133MB second Mylex BA 81C15 one per channel Data Rate Up to 40 MB second when using Fast Wide 16 bit mode DAC960PG and DAC960PJ Installation DAC960PG and DAC960PJ Specifications Physical and Environmental Specifications Controller DAC960PG PJ Form Factor Full length card Length Width Component Height max Board Width with BBU Temperature Operating Storage Humidity Operating Storage Altitude Operating Storage Manual No 775012 12 283 inches 4 2 inches 0 105 inches solder side 0 590 inches component side Not to exceed the width of one PCI
14. N The default BIOS geometry of the controller is set to 2 GB This means that the BIOS can only access the first 2 GB of any drive that has been configured on the controller This is adequate in most applications since BIOS is only used to boot the operating system However it does mean the operating system must be installed in the first 2 GB of the capacity of the configured drive If this is not adequate the BIOS geometry can be changed to 8 GB allowing the BIOS to access the first 8 GB of capacity As a rule of thumb select 8 GB geometry if the following two cases apply 1 You have a system RAID drive that is greater than 2 145 GB in capacity 2 The DOS Windows compatible partitions could be located in an area above the first 2 145 GB Otherwise the 2 GB option is fine Manual No 775012 4 3 BIOS Configuration Utility RAID EzAssist W Note In the event that the RAID controller needs to be replaced the current drive geometry will be restored from the configuration on disk COD BIOS Configuration Utility RAID EzAssist RAID EzAssist is the on board BIOS Configuration Utility used to build several types of RAID configurations Refer to the RAID EzAssist Configuration Utility User Reference Guide or RAID EzAssist Configuration Utility Quick Configuration Guide for instructions on starting and using this utility Operating System If an operating system is not already installed on the system it can b
15. PCI RAID Controller Installation Guide DAC960PG and DAC960PJ PCI to Ultra SCSI RAID Controllers P N 775012 02 08P4078 ffNILEX MOVING DATA gt SMARTER ffNILCX MOVING DATA gt SMARTER DAC960PG and DAC960PJU PCI to Ultra SCSI RAID Controllers Installation Guide Part Number 775012 02 08P4078 Copyright 2000 Mylex Corporation All Rights Reserved All contents of this manual are copyrighted by Mylex Corporation The information contained herein is the exclusive property of Mylex Corporation and shall not be copied transferred photocopied translated on paper film electronic media or computer readable form or otherwise reproduced in any way without the express written permission of Mylex Corporation Greetings Thank you for purchasing the Mylex DAC960PG or DAC960PJ controller This manual describes the installation of the Mylex DAC960PG PJ controllers Requests for technical information about this and other Mylex Corporation products should be made to your Mylex authorized reseller or Mylex sales representative Please Notice IBM Mylex RAID EzAssist Global Array Manager GAM DAC960PG and DAC960PJ are trademarks or registered trademarks of International Business Machines Corp and its subsidiaries Microsoft MS DOS and Windows are registered trademarks of the Microsoft Corporation Novell is a registered trademark of Novell corporation LSI and Symbios are registered trademarks of
16. Video Adapter Network Card MB Memory Operating Sys Other Disk Ctrl Other Cards Pack Configuration System Drive Configuration Indicate in matrix below 1 2 for member of pack 1 pack 2 respective System Size RAID Write ly Indicate S T C or O for Standby Tape CDROM and other drives Drive Level Back Thru SCSI ID Problem Description This DPR form has been included with your Mylex product as a convenience to both you and our Technical Services Department If filled out completely this will greatly assist Mylex personnel in quickly resolving any technical problems or questions you may have Use the Mylex fax number 510 745 7715 to transmit this form to the Technical Services Department or mail to Mylex Corporation Technical Services Department 34551 Ardenwood Blvd Fremont CA 94555 3607 772014 DAC960 Mylex Warranty Customer Policy Thank you for purchasing this Mylex product for your computer system In addition to this high quality product your purchase entitles you to the warranty coverage set forth herein In order to provide this warranty coverage and to indicate your acceptance of this warranty we must have the attached Warranty Registration Card completed and returned to us within 15 days of your purchase Also in order for us to provide you the highest level of service we must know where y
17. address PROM Programmable Read Only Memory memory that users with appropriate instructions can reprogram Protocol A special set of rules for transmitting data between two devices in a telecommunication connection RAID Redundant Array of Independent Disks a collection of two or more disks working together in an array DAC960 controllers implement this technology to connect up to 15 SCSI devices per channel The different forms of RAID implementation are known as RAID levels The system manager or integrator selects the appropriate RAID level for a system This decision will be based on which of the following are to be emphasized Disk Capacity Data Availability redundancy or fault tolerance Disk Performance RAID Adapters See RAID Controller RAID Advisory Board RAB An association of companies whose primary intention is to standardize RAID storage systems Mylex is a member of RAB RAID Controller Low cost RAID controllers that use SCSI channels on the motherboard G 14 DAC960PG and DAC960PJ Installation Guide Glossary RAID Levels Mylex disk array controllers support four RAID Advisory Board approved RAID 0 RAID 1 RAID 3 and RAID 5 two special RAID 0 1 and JBOD and three spanned RAID 10 30 and 50 RAID levels All DAC960 AcceleRAID and eXtremeRAID series controllers support these RAID levels Level 0 Provides block striping across multiple drives yielding higher performance
18. and RAID level implementation Manual No 775012 G 15 RAID Migration A feature in RAID subsystems that allows for changing a RAID level to another level without powering down the system RAM Random Access Memory the built in readable and writable data storage that comes with or can be added to a computer RISC Reduced Instruction Set Computing architecture for an application specific processor RJ 11 RJ 45 Registered Jacks sometimes described as RJ X X a series of telephone connection interfaces receptacle and plug that are registered with the U S Federal Communications Commission FCC The most common telephone jack is the RJ 11 jack which can have six conductors but is usually implemented with four The RJ 11 jack is likely to be the jack that your household or office phones are plugged into from the ordinary untwisted wire sometimes called gray satin or flat wire that people are most familiar with The RJ 45 is a single line jack for digital transmission over ordinary phone wire either untwisted or twisted the interface has eight pins or positions ROM Read Only Memory built in computer memory containing data that normally can only be read not written to ROM contains the programming that allows a computer to be booted up each time you turn it on Unlike a computer s random access memory RAM the data in ROM is not lost when the computer power is turned off a small long life battery in your co
19. byte can store more that one million characters Abbreviated as M or MB Mirrored Cache A cache memory that has duplicate data from another controller In the event of failure of the original controller the second controller can take the cached data and place it on the disk array Mirrored Hard Drive Two hard drives the computer sees as one unit Information is stored simultaneously on each drive If one hard disk drive fails the other contains all of the cached data and the system can continue operating Manual No 775012 G 11 Mirroring Refers to the complete duplication of data on one disk drive to another disk drive this duplication occurs simultaneously with each write operation each disk will be the mirror image of the other also known as RAID Level 1 see RAID levels All Mylex RAID controllers support mirroring M O R E Mylex Online RAID Expansion an advanced configuration mode that allows expansion of any unconfigured or hot spare drive into the expandable drive group while the controller is online with the host For example a system using a five disk drive RAID set can add another disk drive to create a six disk drive RAID set The M O R E operation can be performed on all RAID levels except JBOD Mylex s Global Array Manager GAM supports two M O R E features Expand Capacity allows logical drive expansion for FFx external controllers only Expand Array allows array expansion for both PCI and FFx external c
20. cification s EMC EN 50081 1 1992 EN 55022 1992 Class B EN 50082 1 1992 Generic Immunity EN 61000 4 2 1995 4kV CD 8kV AD EN 50140 1995 3 V m 80 1000 MHz 8096 EN 61000 4 4 1995 0 5kV I O 1kV Power Supplementary Information The product herewith complies with the requirements to the EMC Directive 89 336 EEC Declaration that the equipment specified above conforms to the above directive s and standard s is on file and available for inspection at the manufacturer s address cited above E 2 DAC960PG and DAC960PJ Installation Regulatory Information C Declaration of Conformity Per 89 336 EEC Responsible Party Name Mylex Corporation Address 34551 Ardenwood Boulevard Fremont CA 94555 3607 USA hereby declares that the product Trade Name High Performance Caching RAID Controller Model Number DAC960PG PJ Standards Manual No 775012 conforms to the following specifications EN 50081 1 1992 EMI EN 55022 Class B Radiated Class B Conducted EN 50082 1 1992 Immunity EN 61000 4 2 1995 Electrostatic Discharge EN 61000 4 3 1996 Radiated Susceptibility EN 61000 4 4 1995 Electrical Fast Transients Burst E 3 Community of Europe C Community of Europe CE mark is rated for the DAC960PG and DAC960PJ as follows CISPR 22 Radiated Emission EN55022 EN5082 1 Generic immunity standard for the following IEC 801 2 ESD IEC 801 3 Radiated and IEC 801 4 EFT Burst Warning This is a
21. d adapters for high end desktops workstations and entry level and mid range servers AcceleRAID controllers support PCI based motherboards with embedded SCSI chips and systems that have a PCI expansion slot designated for add in RAID controllers The AcceleRAID family consists of the 150 200 250 352 160 170 and 170LP controllers The 150 200 and 250 products can utilize the on board SCSI chips of servers and use SCSI interrupt steering logic SISL In addition the 150 and 250 products can work in any PC or server with a PCI slot whether or not they have SCSI interrupt steering logic The 150 and 250 have one Ultra2 SCSI LVD channel Active Termination A type of terminator used in current SCSI channel setups which utilizes an active voltage regulator thus closely matching cable impedance Application Server A centralized computer that holds and distributes application programs to users ASIC Application Specific Integrated Circuit a chip created for a specific application Array Multiple disk drives configured to behave as a single independent disk drive See also Disk Array Asynchronous Data Transfer Data transfer not synchronized to a set timing interval Asynchronous devices must wait for a signal from the receiving device after each byte of data Manual No 775012 G 1 Automatic Rebuild Mylex controllers provide automatic rebuild capabilities in the event of a physical disk drive failure The controlle
22. d are hereby assigned by MYLEX to the purchaser of this PRODUCT If MYLEX issues a revision to the BIOS firmware or software included with this PRODUCT within 30 days of your purchase MYLEX will replace such firmware at no charge except handling fees Out of Warranty Service Mylex products which are ineligible for warranty service may be serviced by MYLEX according to our standard price list as modified from time to time A current copy of the standard price list is available from the Technical Support Department Limitation of MYLEX Liability MYLEX s liability arising from the sale use and disposition of this PRODUCT shall in no event exceed the amount paid to MYLEX for this PRODUCT MYLEX assumes no liability for damages arising from the use or failure of any MYLEX product The WARRANY DESCRIBED ABOVE CONSTITUTES THE ONLY WARRANY MADE BY MYLEX MYLEX EXPRESSLY DISCLAIMS ANY AND ALL OTHER WARRANTIES OF ANY KIND WHATSOEVER WHETHER EXPRESSED OR IMPLIED INCLUDING WARRANTIES OF MERCHANT ABILITY AND FITNESS FOR A PARTICULAR PURPOSE WHICH ARE HEREBY EXPRESSLY EXCLUDED IN NO EVENT WILL MYLEX BE LIABLE FOR INCIDENTAL SPECIAL OR CONSEQUEN TIAL DAMAGES INCLUDING WITHOUT LIMITATION LOSS OF DATA USE OR INCOME EVEN IF ADVISED OF SUCH DAMAGES IN ADVANCE Your sole remedies shall be as provided herein P N 772058 07 3 99 Printed in U S A Returned Merchandise Procedures If you suspect that there is a defect in the material or workmanship
23. data is written to the disk before rebooting or powering down the system or you may lose data It is always a good idea to wait for 15 seconds before resetting or rebooting the system If using the Write Pending LED indicator wait three seconds after the LED has gone off before resetting or rebooting the system the optional cache battery backup may also be used to prevent data loss Manual No 775012 C 3 System Reboot or Power Down Messages C 4 DAC960PG and DAC960PJ Installation Appendix D Enclosure Management Introduction Mylex s DAC960PG PJ Disk Array Controllers support the industry standard enclosure management protocol SCSI Accessed Fault Tolerant Enclosures SAF TE This feature allows the host to monitor drive enclosures and detect certain faults or operating environment conditions The host can make a decision to shut down the system or issue a warning based on the type of fault detected SAF TE The SAF TE protocol follows a specification jointly worked out by nStor Corporation and Intel Corporation Enclosures that are compliant with this protocol are known as SCSI Accessed Fault Tolerant Enclosures SAF TE The protocol is compatible with standard SCSI buses and cabling The SAF TE interface standard s objective is to provide a non proprietary means of allowing third party disks and controllers to be automatically integrated with peripheral enclosures that support e Status Signals LEDs audible alarms LCD
24. e installed on a system disk on the controller The operating system is installed along with the operating system device drivers Operating System Device Drivers Device drivers that are compatible with the controller can be found in the Software Kit For details on how to install and load drivers refer to the PCI Disk Array Controller Drivers Installation Guide and User Manual Global Array Manager GAM Server The Global Array Manager Server software supports a variety of operating systems For details on how to install GAM Server refer to the appropriate Global Array Manager Server Software Installation Guide and User Manual 4 4 DAC960PG and DAC960PJ Installation Controller Start up Global Array Manager GAM Client The controller can be configured using Global Array Manager Client GAM Client can also be used from the server or a system client to monitor status and verify data integrity of disks connected to the controller while the system and disks are running For details on how to install and run GAM Client refer to the Global Array Manager Client Software Installation Guide and User Manual In Case of Problems If problems are encountered during start up check the following Check SCSI cabling for loose connections pin mismatches make sure pin 1 on the cable matches pin 1 on the connector bent pins and damaged or crossed cables Check cable length This includes internal bus lengths in enclosures Chec
25. e is enabled and all system drives are switched to write through cache Primarily used in fibre enclosures SIMM Single In line Memory Module RAM packed on a small circuit board with a defined edge connector Two SIMMs are required for a 64 bit memory path on a Pentium processor See also DIMM SISL See SCSI Interrupt Steering Logic SISL SMART Self Monitoring Analysis and Reporting Technology the industry standard reliability prediction indicator for both the ATA IDE and SCSI hard disk drives Hard disk drives with SMART offer early warning of some hard disk failures so critical data can be protected SNMP Simple Network Management Protocol the protocol governing network management for monitoring network devices and their functions Standard Disk Drive This term refers to a hard disk drive with SCSI IDE or other interface attached to the host system through a standard disk controller Standby Replacement of Disks See also Hot Spare One of the most important features the RAID controller provides to achieve automatic non stop service with a high degree of fault tolerance The controller automatically carries out the rebuild operation when a SCSI disk drive fails and both of the following conditions are true A standby SCSI disk drive of identical size is found attached to the same controller All of the system drives that are dependent on the failed disk are redundant system drives e g RAID 1 RAID 3 RAID
26. el SCSI Drive States Refers to a SCSI drive s current operational status At any given time a SCSI drive can be in one of five states Ready Online Standby Dead or Rebuild The controller stores the state of the attached SCSI drives in its non volatile memory This information is retained even after power off Hence if a SCSI disk is labeled dead in one session it will stay in the dead state until a change is made either by using a system level utility or after a rebuild Each state is described below Ready A SCSI disk drive is in a ready state if it is powered on and is available to be configured during the current session but remains unconfigured Online A SCSI disk drive is in an online state if is powered on has been defined as a member of a drive group and is operating properly Standby A SCSI disk drive is in a standby state if it is powered on is able to operate properly and was NOT defined as part of any drive group Manual No 775012 G 17 Offline A SCSI disk drive is in a offline state if it is not present if it is present but not powered on or if it failed to operate properly and was offline by the controller When the controller detects a failure on a disk it kills that disk by changing its state to offline An offline SCSI drive can also be present and powered on but a SCSI drive in a offline state does not participate in any I O activity no commands are
27. eries Information on the RBRC program and the locations of participating recycling centers can be obtained by telephoning 1 800 8 BATTERY in the U S A and following the recorded instructions The information obtained from this telephone number is updated frequently since the RBRC program is growing and new recycling locations are being added regularly A 8 DACO960PG and DAC960PJ Installation Guide Battery Backup Unit Option BBU Specifications Onboard Battery Electrical Properties 3 NiCd 1 2 V 650 mAH cells connected in series for a total of 3 6V at 650mAH Physical Description Nominal pack size in inches 1 89 L X 2 01 W X 0 33 H Battery Charge Life Depends upon memory in use External Battery Not supported Module Dimensions Length 3 75 inches Width 2 875 inches Environmental Temperature Operating 0 C to 40 C 32 F to 104 F Storage 40 C to 60 C 40 F to 140 F Humidity Operating 45 to 85 relative humidity Non operating 45 to 85 relative humidity Manual No 775012 A 9 BBU Specifications A 10 DACO960PG and DAC960PJ Installation Guide Appendix B DAC960PG and DAC960PJ Specifications General Hardware Specifications DAC960PG Controller CPU Memory Cache Firmware PCI SCSI Manual No 775012 DAC960PG Intel i960 RP RISC 32 bit microprocessor 33MHz EDO ECC RAM 60ns 72 pin SIMM n x 40 Use only Mylex supplied SIMMS Minimum 4
28. erious injury 2 Remove the loopback plug from J5 on the DAC960PG or DAC960PJ Keep the loopback plug in a safe place in case the BBU needs to be removed at a later time A 2 DACO960PG and DAC960PJ Installation Guide Battery Backup Unit Option This mark on the loopback plug must be aligned with Pin1 on J5 J5 Detail Loopback Plug Figure A 2 Removing the Loopback Plug 3 Remove the protective pin cover and peel off label from J1 on the BBU 4 Leaving the 4 standoffs attached to the BBU remove a nylon screw from the free end of each nylon standoff Manual No 775012 A 3 Installation Nylon Screw Standoffs Figure A 3 Installing the BBU 5 Install the BBU so that J1 on the BBU connects to J5 on the DAC960PG or DAC960PJ Pin 1 on the BBU s J1 must connect to hole 1 on the DAC960PG and DAC960PJ s J5 The mounting holes on the BBU will line up with the mounting holes on the DAC960PG or DAC960PJ if the connectors are plugged in correctly 6 Besure the four standoffs line up with the four holes in the DAC960PG or DAC960PJ Place a nylon screw through a hole from the back of the DAC960PG or DAC960PJ into a standoff and turn the screw to the right until it is snug not too tight Repeat this step with the remaining three standoff screws A 4 DAC960PG and DAC960PJ Installation Guide Battery Backup Unit Option Operation Battery Conditioning Prior to Use Battery conditioning is automatic
29. f the system and disconnect the power cables before starting the installation 3 Follow electrostatic discharge ESD safety procedures Use grounded wrist straps or ESD safe footwear and work in an ESD safe area 4 Perform a safety check on the installation before powering on the system Make sure that all of the cabling Pin 1 locations are correct and that all cables are firmly seated in the connectors Make sure all SCSI conventions cable type cable length termination SCSI IDs etc are followed Manual No 775012 3 1 Connectors and Jumpers Connectors and Jumpers Up to three Ultra SCSI channels are supported on the DAC960PG and DAC960PJ The SCSI connector locations are shown in Figure 3 1 Be sure that the Jumper JP6 has a jumper installed see Figure 3 1 and Table 3 1 Internal Internal Internal Channel 0 Channel 1 Channel 2 Connector Connector Connector h JP4 5 o alia JP5 SIS JP6 ojig z l0 c EE S EH S z 8 T if o A x IO W Figure 3 1 Full length Controller Component Layout Table 3 1 Full length Controller Jumper and Connector Descriptions Component Description Default Setting JP4 Connector for optional front panel LED harness JP5 Serial Port Connector JP6 Reserved Installed J5 Battery Backup connector If a BBU is not I
30. he bus This allows hot swap devices to be added or removed from the SCSI bus without affecting termination Manual No 775012 2 3 SCSI Cabling SCSI Cabling Each Ultra SCSI channel supports up to 15 drives The total allowable SCSI bus lengths will be limited to the single ended bus lengths shown in Table 2 1 Table 2 1 Supported SCSI Formats and Bus Lengths Bus Speed Bus Width Bus Length Drives per SCSI Drive Type Max MB Sec Bits Max Meters Channel Max SCSI 1 5 8 6 7 Fast SCSI 10 8 3 7 Fast Wide SCSI 20 16 3 15 Ultra SCSI 20 8 1 5 7 Ultra SCSI 20 8 3 3 Wide Ultra SCSI 40 16 15t Wide Ultra SCSI 40 16 1 5 7 Wide Ultra SCSI 40 16 3 3 SCSI Trade Association terms The SCSI ID reserved for the RAID controller is not included in this total T The maximum number of devices allowed on a Wide Ultra SCSI channel is 8 including the controller unless bus extender technology is used 2 4 DAC960PG and DAC960PJ Installation Preinstallation Planning SCSI Drive Preparation Prepare the drives for installation as follows Remove any terminators attached to the drive or set any drive termination jumpers to the disabled position Set the SCSI addresses on the drives W Note Each drive on a channel must have a unique ID chosen from 0 through 6 or 8 through 15 ID 7 cannot be used as a drive ID because it is reserved for the controller Enable term
31. ices double the speed of narrow SCSI Ultra2 SCSI Fast 40 SCSI A higher performance SCSI protocol than Ultra SCSI Ultra2 SCSI has a bus speed of 40 Megabytes per second in the Narrow SCSI configuration and 80 Megabytes in the Wide SCSI Wide Ultra2 SCSI configuration Wide SCSI A SCSI protocol and signal definition providing 16 bit wide data path Write Back Cache A caching strategy whereby write operations result in a completion signal being sent to the host operating system as soon as the cache not the disk drive receives the data to be written The target disk drive will receive the data at a more appropriate time in order to increase controller performance An optional cache battery backup can be used to protect against data loss as a result of a power failure or system crash Write Through Cache A caching strategy whereby data is written to the SCSI drive before a completion status is returned to the host operating system This caching strategy is considered more secure since a power failure will be less likely to cause loss of data However a write through cache results in a slightly lower performance G 22 DAC960PG and DAC960PJ Installation Guide MNWLEX DAC960 Problem Report Customer Identification DAC960 Identification Date Purchase Date Model Invoice Number Serial Number Chnls Cache Firmware Ver BIOS Ver Make Model Size Type of System Information CPU Speed BIOS Ver
32. ime interval and is faster than asynchronous SCSI because there is no wait for acknowledgement of each byte from the receiving device up to 20MHz System Drives A system drive is equivalent to a logical drive System drives are presented to the operating system as available disk drives each with a capacity specified by the eXtremeRAID controller Target ID The SCSI ID of a device attached to a controller Each SCSI channel can have up to 15 attached SCSI devices target ID from 0 to 6 and 8 to 15 Terminator A part used to end a SCSI bus Termination A method of matching transmission impedance of a bus to eliminate signal reflections from the physical ends of the bus Transfer Rate The rate at which data moves between the host computer and storage input or output devices usually expressed as a number of characters per second Ultra 160 SCSI Ultra3 SCSI The newest in SCSI technology Ultra 160 SCSI increases performance reliability and manageability With transfer rates of 160 MBps cyclical redundancy check and the capability to automatically test the interface s performance level the Ultra 160 SCSI can keep up with fibre channel technology Manual No 775012 G 21 Ultra SCSI Fast 20 SCSI A high performance SCSI protocol that has a bus speed of 20 Megabytes per second in the Narrow SCSI configuration and 40 MB in the Wide SCSI Fast 20 Wide SCSI configuration Ultra Wide SCSI 16 bit wide Ultra SCSI IS dev
33. indirect special exemplary incidental or consequential damages in certain transactions therefore this statement may not apply to you Also you may have other rights which vary from jurisdiction to jurisdiction Information in this publication is subject to change without notice and does not represent a commitment on the part of Mylex Corporation Changes may be made periodically to the information herein these changes will be incorporated in new editions of the publication Mylex Corporation reserves the right to make improvements and or changes at any time in the product s and or program s described in this publication It is possible that this publication may contain reference to or information about Mylex Corporation products machines and programs programming or services that are not announced in your country Such references or information must not be construed to mean that Mylex Corporation intends to announce provide or make available such Mylex prod ucts programming or services in your jurisdiction About This Manual This installation guide covers hardware set up and configuration procedures necessary for the installation of Mylex DAC960PG and DAC960PJ PCI to Ultra SCSI RAID controllers Chapter 1 describes the controllers standard package contents and user supplied items necessary for installation Chapter 2 describes steps to be performed prior to controller installation Chapter 3 describes installation of the co
34. ing to any particular procurement plan ffNILEX MOVING DATA gt SMARTER CORPORATE OFFICE 34551 Ardenwood Boulevard Fremont CA 94555 3607 Tel 510 796 6100 Domestic Sales Fax 510 745 8016 International Sales Fax 510 745 7521 www mylex com
35. issued to dead drives Rebuild A SCSI disk drive is in a rebuild state while it is in the process of being rebuilt During this process data is regenerated and written to the disk drive This state is also referred to as Write Only WRO SCSI Interrupt Steering Logic SISL Architecture that allows a RAID controller such as AcceleRAID 150 200 or 250 to implement RAID on a system board embedded SCSI bus or a set of SCSI busses SDRAM Synchronous Dynamic Random Access Memory a form of dynamic random access memory DRAM that can be coordinated or synchronized to the clock speed of the computer Segment Size See Cache Line Size Sequential I O A type of read and write operation where entire blocks of data are accessed one after another in sequence as opposed to randomly Server A computer program that provides and manages services to other computer programs on the same or other computers The computer that a server program runs in is also frequently referred to as a server SES SCSI Enclosure Services a standard for SCSI access to services within an enclosure containing one or more SCSI devices For disk drives power supplies cooling elements and temperature sensors the actions performed are the same as for SAF TE monitoring If a UPS is connected to any SES monitored enclosures and an AC failure or two minute warning is G 18 DAC960PG and DAC960PJ Installation Guide Glossary reported conservative cach
36. k termination Check SCSI IDs on all drives Manual No 775012 4 5 In Case of Problems DAC960PG and DAC960PJ Installation Appendix A Battery Backup Unit Option Product Description The Battery Backup Unit BBU option is an add on module that protects the data in the RAID controller s cache memory in the event of a power failure The battery backup module monitors the write back cache on the DAC960PG and DAC960PJ and provides power to the cache if it contains data not yet written to the drives when power is lost The controller with the BBU installed occupies only one PCI slot on the host backplane Features Some of the new features of the BBU include Gas gauge circuit for battery charge monitoring Quick charge to replenish a drained battery Support for low power EDO ECC RAM modules ce Fe Battery Pack 3 6v 650mAH J1 Standoffs Figure A 1 BBU Components Manual No 775012 A 1 Installation Installation Tools Needed The only tool needed for the installation is a small flat blade screwdriver Procedure 1 If the DAC960PG or DACO960PJ is not already removed from the system power down the system and then remove the DAC960PG or DAC960PJ WARNING Disconnect the system from the electrical wall outlet before opening the system cabinet Working with the system covers off and power applied to the system can result in shock and s
37. lacement table limit of 8 should not cause any problems Assuming that a disk fails about once a year drives we support generally come with a 5 year warranty the system would run continuously for a minimum of eight years before the table would need to be cleared Stripe Order The order in which SCSI disk drives appear within a drive group This order must be maintained and is critical to the controller s ability to rebuild failed drives Stripe Size The size in kilobytes 1024 bytes of a single I O operation A stripe of data data residing in actual physical disk sectors which are logically ordered first to last is divided over all disks in the drive group Stripe Width The number of striped SCSI drives within a drive group Striping The storing of a sequential block of incoming data across multiple SCSI drives in a group For example if there are 3 SCSI drives in a group the data will be separated into blocks and block 1 of the data will be stored on SCSI G 20 DAC960PG and DAC960PJ Installation Guide Glossary drive 1 block 2 on SCSI drive 2 block 3 on SCSI drive 3 block 4 on SCSI drive 1 block 5 on SCSI drive 2 and so on This storage method increases the disk system throughput by ensuring a balanced load among all drives Sustained Data Transfer Rate A rate of data transfer defined for continuous operation at a maximum speed level Synchronous Data Transfer Data transmission synchronized to a defined t
38. ld have the same size otherwise each of the disks in the group will effectively have the capacity of the smallest member The total size of the drive group will be the size of the smallest disk in the group multiplied by the number of disks in the group For example if you have 4 disks of 400MB each and 1 disk of 200MB in a pack the effective capacity available for use is only 1000MB 5x200 not 1800MB Drivers A software routine that receives I O requests from higher levels within the operating system and converts those requests to the protocol required by a specific hardware device Dual Active A pair of components such as storage controllers in a failure tolerant storage system that share a task or set of tasks when both are functioning normally When one component of the pair fails the other takes the entire load Dual active controllers also called Active Active controllers are connected to the same set of devices and provide a combination of higher I O performance and greater failure tolerance than a single controller Manual No 775012 G 5 ECC Error Correcting Code a method of generating redundant information which can be used to detect and correct errors in stored or transmitted data EDO Extended Data Output a type of random access memory RAM chip designed to improve the time to read from memory on faster microprocessors such as the Intel Pentium EEPROM Electrically Erasable PROM see EPROM EISA Ex
39. lty cable or drive or a loose connection Check all of the connectors cables drives and try to boot If the error persists it most likely indicates a genuine failure and needs to be corrected To correct it boot and run the on board Mylex Disk Array Configuration Utility see Chapter 4 For more information refer to the RAID EzAssist Configuration Utility User Reference Guide available on CD ROM or RAID EzAssist Configuration Utility Quick Configuration Guide C 2 DAC960PG and DAC960PJ Installation Error Messages NVRAM Error With Firmware 4 x if the BIOS displays a mismatch between the NVRAM and the COD no drives will be installed Normally this error will not be displayed If it is boot and run the on board Mylex Disk Array Configuration Utility see Chapter 4 to recover from the error For more information refer to the RAID EzAssist Configuration Utility User Reference Guide available on CD ROM or RAID EzAssist Configuration Utility Quick Configuration Guide System Reboot or Power Down Messages Status messages may also be available from LED indicators connected to the DAC960PG PJ The Write Pending indicator is especially important when preparing to power down the system The DAC960PG PJ is a caching controller with up to 128 MB of cache memory data may still be in the cache waiting to be written to the disk drives when the system reports that a write command was completed It is very important to make sure that all
40. mputer sustains the ROM SAF TE SCSI Accessed Fault Tolerant Enclosure an open specification designed to provide a comprehensive standardized method to monitor and report status information on the condition of disk drives power supplies and cooling systems used in high availability LAN servers and storage subsystems The specification is independent of hardware I O cabling operating systems server platforms and RAID implementation because the G 16 DACO960PG and DAC960PJ Installation Guide Glossary enclosure itself is treated as simply another device on the SCSI bus Many other leading server storage and RAID controller manufacturers worldwide have endorsed the SAF TE specification Products compliant with the SAF TE specification will reduce the cost of managing storage enclosures making it easier for a LAN administrator to obtain base level fault tolerant alert notification and status information All Mylex RAID controllers feature SAF TE SCSI Small Computer System Interface a technological standard that defines connections between computers and peripheral devices SCSI Adapters Storage controllers for managing SCSI devices SCSI Drive A disk drive equipped with a SCSI interface sometimes referred to as a SCSI Disk Each disk drive will be assigned a SCSI address or SCSI ID which is a number from 0 to 7 0 to 15 under wide or Ultra SCSI The SCSI address uniquely identifies the drive on the SCSI bus or chann
41. nal RAID Controllers HDM Hardware Driver Module a driver set required for SCSI adapters for use in an LO environment Host Any computer system to which disks are attached and accessible for data storage and I O Host Bus Adapter HBA An I O adapter that connects a host I O bus to the host s storage memory system Host I O Bus An I O bus used to connect a host computer to storage systems or storage devices Hot Plug The process of adding or removing a device from a bus while transactions involving other devices are occurring over the bus See also PCI Hot Plug Hot Replacement of Disks The design of all Mylex controllers allows for the replacement of failed hard disk drives without interruption of system service In the event of a SCSI drive failure on a properly configured system where the data redundancy features of the controller are used the system generates a message to alert the system operator When a replacement drive becomes available the system operator can remove the failed disk drive install a new disk drive and instruct the G 8 DAC960PG and DAC960PJ Installation Guide Glossary controller to rebuild the data on the new drive all without interrupting system operations Once the rebuild is complete the controller will be brought back into a fault tolerant state See also Hot Swap Hot Spare A physical disk drive not part of a system drive that the controller can use to automatically
42. nia U S A 94555 3607 Mylex will pay for return freight via such carrier as MYLEX shall deem appropriate Technical Support Technical support to assist you in resolving problems with MYLEX products is available through MYLEX s Tech nical Support Department In the U S A the Technical Support Department can be reached by telephone at 510 608 2400 by FAX at 510 745 7715 or by e mail at support mylex com Current hours of operation which are subject to change are from 6 00 a m to 6 00 p m Pacific Time Mondays through Fridays excluding U S A national holidays Many problems can also be solved using the Mylex Web site http www mylex com which has a support area available 24 hours a day for interactive technical support Included with the shipment of most MYLEX products is a System Problem Report SPR form When contacting the Technical Support Department for assistance with an installation or compatibility problem we recommend that this form be completed and sent by facsimile or mail to MYLEX Completion of this form will allow our Technical Support Department to solve most technical problems expeditiously Mylex will make reasonable efforts to address compatibility problems which may arise with respect to third party products but shall not be responsible for the compatibility of its products with the products of any third party Cus tomers are advised to verify each product s compatibility with their installation before committ
43. nstalled at installed a loopback plug must be installed in factory this socket 3 2 DAC960PG and DAC960PJ Installation Installation External SCSI Connectors The external connectors on the controller are female Very High Density Cable Interconnect VHDCI connectors Figure 3 2 shows the configurations that are available on both the DAC960PG and the DAC960PJ A a i ML DAC960PG E Zo 1 Channel B 7 pn PX gO DAC960PG Ge M c ZEE 2 3 Channel Ce DAC960PJ E 28 gt 960 e 2 3 Channel Figure 3 2 Configurations of 1 2 and 3 External SCSI Connectors Manual No 775012 3 3 Safety Considerations Safety Considerations Be sure to observe the following precautions before beginning the controller installation procedure AN Caution Anti static handling procedures are required Leave the controller in its anti static bag until it is time to plug the controller into the PCI slot The use of a grounded wrist strap and other ESD protective measures are highly recommended WARNING Disconnect the system from the electrical wall outlet before opening the system cabinet Working with the system covers off and power applied to the system can result in shock and serious injury 3 4 DAC960PG and DAC960PJ Installation Installation Installing the Controller Note If a Battery Backup Unit BBU is to be installed it should be done before the controller is installed into the host system Refer to Appendix A fo
44. ntroller Chapter 4 describes controller start up and BIOS options Appendix A describes the Battery Backup Unit option Appendix B provides the hardware and environmental specifications Appendix C describes error messages and how to identify problems Appendix D provides regulatory information certifications and warnings Conventions Throughout the manual the following conventions are used to describe user interaction with the product prompt This style of type indicates screen display messages Enter Press the key labeled Enter or Delete etc Note A Note is supplementary information that can have an effect on system performance A Caution A Caution is a notification that a proscribed action has the potential to adversely affect equipment operation system performance or data integrity WARNING A Warning is a notification that a proscribed action will definitely result in equipment damage data loss or personal injury Contents Chapter 1 DERE e Dn Mmm T 1 1 Product Description eese 1 1 Controller Features and Functions esee 1 2 Operating System Support sse 1 2 Standard Package Contents ssssseeeeeeeees 1 3 ee TEE 1 3 Softwar 2 Hiei nete ec on n i ive ede Dope cerea 1 3 User supplied Items eseeeseeneeeeeeeeeneneennnnnnnnnnnen 1 4 Chapter 2 Preinstallation Planning s
45. onal Printed Manuals Diskettes CD ROM with Additional with Hardware Manuals Drivers Software Manuals i and GAM Client Software T H dl 0 H Install Guide i Figure 1 2 Standard Package Contents Manual No 775012 1 3 User supplied Items User supplied Items The following user supplied items are required to perform this installation IBM PC compatible host system with an available PCI slot PCI 2 1 compliant Network operating system software as required SCSI cables to connect the controller and disk drives Static grounding strap or electrostatic discharge ESD safe work area Disk array enclosure or equivalent and SCSI disk drives DAC960PG and DAC960PJ Installation Chapter 2 Preinstallation Planning This chapter covers SCSI termination SCSI cabling SCSI drive preparation Limitations on mixing Narrow and Wide SCSI drives Mylex Disk Array Controllers are designed to work in a variety of SCSI RAID application environments Certain configuration steps need to be performed prior to installing the controller into a RAID environment Manual No 775012 2 1 SCSI Termination SCSI Termination The DAC960PG and DAC960PJ are equipped with automatic SCSI termination circuitry If the controller is at the end of a SCSI bus it automatically enables on board termination If all the SCSI devices on a channel are connected eithe
46. ons Sequence After physically installing the controller and connecting the cabling do the following if you need to set or modify the BIOS options see Setting BIOS Options on page 4 2 for details 1 Power on the any drive enclosures connected to the controller 2 Power on the computer 3 Watch the messages on the screen for the following prompt to be displayed Press lt ALT M gt for BIOS options 4 Press AIt M to get into the BIOS Options menu 5 The BIOS Options menu provides the following items to choose from BIOS options BIOS enabled CD ROM boot disabled 2 GB drive geometry 6 To select any of the items in the menu highlight the selection with the Up Arrow or Down Arrow Press Enter to toggle any of the 3 items W Note BIOS must be enabled to toggle the CD ROM boot and the Drive geometry parameters Manual No 775012 4 1 BIOS Options Sequence Setting BIOS Options The available BIOS options are BIOS disabled enabled CD ROM boot disabled disabled e 2GB 8GB drive geometry BIOS Disable or Enable This option must be enabled in order to toggle the CDROM boot and the drive geometry parameters shown in the BIOS Options menu The BIOS must also be enabled in order to boot from any device e g CD ROM or system drive configured on the controller or to access any DOS partition on any drive configured on the controller When BIOS Disable or Enable is selected the following message will
47. ontrollers During the RAID set expansion process which includes re striping data from the old smaller RAID set to the new expanded RAID set the controller continues to service host I O requests MTBF Mean Time Between Failures the average time from start of use to failure in a large population of identical systems computers or devices Narrow SCSI 8 bit wide standard SCSI Compare with Fast SCSI Fast Wide SCSI Ultra SCSI Ultra Wide SCSI Ultra Fast SCSI Ultra 160 SCSI and WideSCSI NVRAM Non Volatile Random Access Memory a memory unit equipped with a battery so that the data stays intact even after the main power had been switched off G 12 DAC960PG and DAC960PJ Installation Guide Glossary Offline A Logical Drive is in an offline state if no data can be read from it or written to it Offline does not apply to physical disk drives System commands issued to offline logical drives are returned with an error status no operations can be performed on offline logical drives See also Logical Drive States Online and Critical Online A Logical Drive is in an online state if all of its participating SCSI drives have power and are operational See also Logical Drive States Critical and Offline Parity A method of providing complete data redundancy while requiring only a fraction of the storage capacity of mirroring The data and parity blocks are divided between the disk drives in such a way that if
48. ou purchased your MYLEX product Three Year Limited Warranty If at any time during the thirty six month period immediately following the date of original purchase of the MYLEX product enclosed herewith the PRODUCT you discover one or more defects in the material or workmanship MYLEX will repair or at MYLEX s sole option replace the PRODUCT If the PRODUCT fails to operate at any time within seven days after the date of its original purchase it will be replaced by MYLEX Such repair or replace ment will be your sole remedy against MYLEX and MYLEX s only liability to you for any failure or malfunction of the PRODUCT The warranty set forth in this paragraph will be void if 1 The PRODUCT has been installed in an improper manner or in an improper operating environment 2 The PRODUCT has been modified or repaired by any party other than MYLEX or a MYLEX factory authorized service center 3 The PRODUCT has been damaged Some MYLEX products will have a Warranty Expiration Date label affixed to the product itself When present the warranty period will extend through the last day of the month indicated This warranty will not apply to and MYLEX provides no warranty for any BIOS software ROM based firmware or any other PRODUCT developed or manufactured by any third party whether included with this PRODUCT or not Such warranty or warranties as are provided by third parties to the extent permitted thereby shall be made available an
49. power on the drives Refer to the drive manual for specific information about drive configuration settings To get best performance from the controller the SCSI drives should be equally distributed across the SCSI channels and the controller s data transfer rate should be set to the optimum rate for the drives being used Mixing Narrow and Wide SCSI Devices Narrow and Wide SCSI devices must not be mixed on a single channel If mixing Narrow and Wide SCSI devices is desired at least one channel must be dedicated to Narrow SCSI and at least one channel must be dedicated to Wide SCSI Manual No 775012 2 5 Mixing Narrow and Wide SCSI Devices 2 6 DAC960PG and DAC960PJ Installation Chapter 3 Installation This chapter covers Preparation Connectors and Jumpers Safety Considerations Controller Installation Procedures Before You Begin Installing a Mylex DAC960 PCI to Ultra SCSI RAID controller is no more difficult than installing any PCI adapter Follow these steps and then follow the installation procedures in this chapter WARNING Disconnect the system from the electrical wall outlet before opening the system cabinet Working with the system covers off and power applied to the system can result in shock and serious injury 1 Read all of the instructions in this chapter completely before proceed ing Follow the Notes Cautions and Warnings described in this manual and marked on the equipment 2 Power of
50. pressed in MBps DB 9 A type of connector used for serial interfaces Device Driver A software program that controls a particular type of device attached to a computer such as a RAID subsystem printer display CD ROM disk drive etc DIMM Dual In line Memory Module a circuit board that has memory chips Instead of installing two SIMMs for the 64 bit memory path on a Pentium processor one DIMM can be installed See also SIMM Disk A non volatile randomly addressable re writable data storage device including rotating magnetic and optical disks as well as solid state disks or other electronic storage elements G 4 DACO960PG and DAC960PJ Installation Guide Glossary Disk Array A collection of disks from one or more commonly accessible disk systems Disk arrays also known as RAID allow disk drives to be used together to improve fault tolerance performance or both Disk arrays are commonly used on servers and are becoming more popular on desktops and workstations See also Array Disk Drive A device for the electronic digital storage of information Disk System A storage system capable of supporting only disks Drive Groups Drive Packs A group of individual disk drives preferably identical that are logically tied to each other and are addressed as a single unit In some cases this may be called a drive pack when referring to just the physical devices All the physical devices in a drive group shou
51. put the transmission of information between an external source and the computer UO Bus Any path used for the transfer of data and control information between I O adapters and storage controllers or storage devices See also Bus LO Intelligent Input Output a driver that uses special UO processes to eliminate I O bottlenecks The processes deal with interrupt handling buffering and data transfer An I O driver also includes an OS specific module OSM which handles higher level OS details and a hardware device module HDM which knows how to communicate with certain devices ISA Industry Standard Architecture a standard bus computer interconnection architecture associated with the IBM AT motherboard It allows 16 bits at a time to flow between the motherboard circuitry and an expansion slot card and its associated device s JBOD Just A Bunch of Disks Drives a number of disk drives usually in an enclosure JBOD implies that the disks do not use RAID technology and function independently All Mylex RAID controllers support JBOD mode Jumper A short piece of electrical conductor encased in plastic used to connect pins on a device to provide settings that the user can change The settings remain constant during operation For example jumpers often set SCSI ID termination and IDE master slave settings Kilobyte 21 1 024 Abbreviated as K or KB Logical Drive The logical devices presented to the operating system
52. r RAM Caching speeds up the operation of RAID systems disk drives computers and servers or other peripheral devices CD ROM Compact Disk Read Only Memory a removable read only storage device similar to an audio compact laser disk holding up to 640MB of data Channel Any path used for the transfer of data and control of information between storage devices and a storage controller or I O adapter Also refers to one Manual No 775012 G 3 SCSI bus on a disk array controller Each disk array controller provides at least one channel Conservative Cache An operating mode in which system drives configured with the write back caching policy are treated as though they were configured for write through operation and the cache is flushed Consistency Check A process that verifies the integrity of redundant data A consistency check on a RAID 1 or RAID 0 1 configuration mirroring checks if the data on drives and their mirrored pair are exactly the same For RAID Level 3 or RAID Level 5 a consistency check calculates the parity from the data written on the disk and compares it to the written parity A consistency check from Mylex utilities such as Global Array Manager M GAM or RAID EzAssist M give the user the ability to have a discrepancy reported and corrected See also Parity Check Data Transfer Rate The amount of data per unit of time moved through a channel or I O Bus in the course of execution of an I O load usually ex
53. r information on installing the BBU Follow these steps 1 M 009 selina ON Power off all enclosures and the system components and disconnect their power cords Remove the covers or the cabinet as necessary to access the I O slots on the system board Choose a vacant PCI slot and remove the metal cover plate from the slot s access port usually at the back of the cabinet Save the retaining screw Plug the controller firmly into the PCI slot so that the controller s external connectors can be accessed through the access port Use the retaining screw to secure the controller by its mounting bracket Connect the cables from the disk array s to the drive channel port s on the controller Look to confirm that all drive channels in use are properly terminated Safety check the installation Reconnect the power but DO NOT POWER ON the system at this time Proceed to the next chapter Manual No 775012 3 5 Installing the Controller DAC960PG and DAC960PJ Installation Chapter 4 Controller Start up This chapter describes BIOS Options BIOS Configuration Utility RAID EzAssist Operating System Device Drivers GAM What to Check in Case of Problems This chapter describes the DAC960PG and DAC960PJ controller start up procedures and messages produced by the BIOS during start up or re boot This chapter also explains three BIOS options that are available for configuring controller operation BIOS Opti
54. r performs a rebuild operation automatically when a disk drive fails and both of the following conditions are true A standby or hot spare disk drive of identical or larger size is found attached to the same controller All system drives that are dependent on the failed disk drive are configured as a redundant array RAID 1 RAID 3 RAID 5 or RAID 0 1 During the automatic rebuild process system activity continues however system performance may degrade slightly BBU Battery Backup Unit provides a battery backup for data currently stored in the on board cache memory during intermittent power loss to the controller In the event of a power failure the BBU can hold data in the cache for a certain amount of time Once power is restored the data can be saved to a disk BIOS Basic Input Output System software that determines what a computer can do without accessing programs The BIOS contains all the code required to control the keyboard screen drives serial communications and other functions Usually the BIOS is built into a ROM chip installed on the motherboard so that the BIOS will always be available and not affected by disk failure Sometimes the BIOS is recorded on a flash memory chip BIOS Configuration Utility BIOS based Configuration Utility a utility program sequence used upon powerup for configuring various hardware elements in a system Booting or Bootstrapping Loading operating system code and other basic
55. r to an internal connector of a channel or to an external connector of a channel the end of the SCSI bus farthest from the controller must have a terminator installed In this case the controller automatically enables on board termination See Figure 2 1 for examples of internal or external drive configurations If some SCSI devices are connected to the internal connector of a channel and some are connected to the external connector of the same channel the two ends of the SCSI bus farthest from the controller must each be terminated In this case the controller automatically disables on board termination See Figure 2 1 for an example of an internal external drive configuration 2 2 DAC960PG and DAC960PJ Installation Preinstallation Planning T Auto Termination Enabled External Drive Configuration g Auto Termination Enabled Internal Drive Configuration Auto Termination Disabled Internal External Drive Configuration Figure 2 1 DAC960 Controller Termination Examples W Note For this discussion assume that the illustrated internal and external connectors are both on the same channel It is better to terminate the ends of the SCSI bus itself than it is to terminate the end devices on t
56. rebuild a critical system drive The hot spare drive must have at least as much capacity as the largest disk drive in the array or the rebuild may not start See also Hot Standby Hot Standby A redundant component in a fault tolerant storage system that has power applied and is ready to operate but which does not perform its task as long as the primary component for which it is standing by is functioning properly See also Hot Replacement of Disk and Hot Spare Hot Swap The exchange of a replacement unit in a storage system for a defective unit The exchange requires human intervention but the system can continue to perform its normal functions compare with Auto Swap Cold Swap and Warm Swap See also Hot Replacement of Disk In Line Terminator A plug attached to the end of a SCSI cable in order to initiate active termination Used when SCSI devices on the cable do not have built in termination See also Active Termination Interface A hardware or software protocol that manages the exchange of data between the hard disk drive and the computer The most common interfaces for small computer systems are ATA also known as IDE and SCSI Internal RAID Controller A controller circuit board that resides inside a computer or server An internal RAID controller resides on a bus such as the PCI bus Examples of internal RAID controllers include the Mylex AcceleRAID and eXtremeRAID families Manual No 775012 G 9 y o Input Out
57. s Built in configuration utilities in BIOS with firmware 4 06 and above A Battery Backup BBU option to protect data in cache during power loss is available for full length card models Operating System Support MS DOS 5 x 6 x and above are supported using drivers that reside in the DAC960PG or DAC960PJ BIOS Many other popular operating systems are supported using software drivers in the Disk Array Controller Software Kit that is included with the DAC960PG or DAC960PJ controller see the PCI Disk Array Controller Drivers Installation Guide and User Manual DAC960PG and DAC960PJ Installation Introduction Standard Package Contents The following items are supplied with the standard shipping package Hardware e DAC960PG or DAC960PJ Disk Array Controller with documentation Battery Backup BBU port loopback terminator plug or Optional Battery Backup Unit BBU W Note A loopback terminator plug must be installed on the DAC960PG or DAC960PJ controller s BBU connector if the optional BBU is not present Software RAID EzAssist disk array controller configuration utility with documentation on CD ROM and a printed Quick Configuration Guide Software Kit driver diskettes with documentation on CD ROM and a printed PCI Drivers Installation Guide Optional Global Array Manager GAM Client and Server software and documentation on CD ROM DAC960PG P J Controller Battery Backup a Unit E opti
58. s Gauge function in GAM see the Global Array Manager Client Software Installation Guide and User Manual Removing the Battery Backup Module The battery backup module will need to be removed for one of the following reasons 1 The NiCd battery will no longer accept a charge properly NiCd battery life expectancy is approximately 5 years 2 The cache memory needs to be removed from the DAC960PG or DAC960PJ for replacement or upgrade When one of these conditions occur observe the following precautions WARNING Replace the battery only with the same or equivalent type of battery recommended by the battery manufacturer Dispose of used batteries according to the manufacturer s instructions WARNING Do not attempt to install remove or change a cache SIMM on the DAC960PG or DAC960PJ with the BBU installed Serious damage to the SIMM and or the battery backup unit will occur if this precaution is not followed AN Caution If you plan to operate your DAC960PG or DAC960PJ without the BBU be sure to reinstall the loopback plug see the Mechanical Installation Procedure section and Figure A 2 A 6 DACO960PG and DAC960PJ Installation Guide Battery Backup Unit Option Functional Description General Operational Description Whenever the system is running the BBU is standing by monitoring the voltage level of VCC In the event of a power failure the VCC voltage level will begin to drop When the BBU detects this
59. s etc Hot swapping of drives Monitoring of fans power supplies and enclosure temperature SCSI is the underlying transport mechanism for communicating enclosure information All standard SCSI host adapters will work There is no need to consider reserved signals or special cabling The SAF TE interface can be implemented as a SCSI target that uses a SCSI port and an 8 bit microcontroller All communication is initiated by the host The SAF TE processor acts only in target mode The SAF TE processor should be periodically polled by the host approximately every 2 to 10 seconds Manual No 775012 D 1 SAF TE D 2 DAC960PG and DAC960PJ Installation Appendix E Regulatory Information FE class B Compliance THIS DEVICE COMPLIES WITH PART 15 OF THE FCC RULES OPERATION IS SUBJECT TO THE FOLLOWING TWO CONDITIONS 3 THIS DEVICE MAY NOT CAUSE HARMFUL INTERFERENCE AND 4 THIS DEVICE MUST ACCEPT ANY INTERFERENCE RECEIVED INCLUDING INTERFERENCE THAT MAY CAUSE UNDESIRED OPERATION This equipment has been tested and found to comply with the limits for a Class B digital device pursuant to Part 15 of the FCC rules These limits are designed to provide reasonable protection against harmful interference in residential installations This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions may cause harmful interference to radio communications However
60. s 100 the current number of hours and maximum number of hours printed out below the left dial will be equal Manual No 775012 A 7 Functional Description Battery and Charge Circuit Onboard Battery The onboard battery is rated at 3 6 v with a capacity of 650 mAH The BBU has a DC DC converter that converts the 3 6 v from the battery to 5 v which is the nominal voltage needed to replace VCC if a power failure should occur Battery Charger Battery charging and conditioning are automatically handled by the BBU No manual preconditioning needs to be performed by the user If the battery capacity falls below a predetermined level which is likely to happen during a power failure the battery charger goes into a quick charge mode If the battery is fully charged the charger goes into a trickle charge mode Recycling the Battery The on board battery that comes with the BBU has the logo of the Rechargeable Battery Recycling Corporation RBRC stamped on it The logo means that recycling fees have been prepaid on this battery pack AN Caution Do not dispose of a rechargeable battery with regular trash in a landfill Rechargeable batteries contain toxic chemicals and metals that are harmful to the environment Improperly disposing of rechargeable batteries is illegal S s Ni Cd Figure A 4 RBRC Logo The RBRC is a non profit corporation that promotes the recycling of rechargeable batteries including nickel cadmium batt
61. slot O C to 55 C 32 F to 131 F 20 C to 70 C 4 F to 158 F 10 to 90 relative humidity non condensing 10 to 90 relative humidity non condensing Up to 3 048m 10 000 ft Up to 15 240m 50 000 ft Physical and Environmental Specifications B 4 DAC960PG and DAC960PJ Installation Appendix C Error Messages Start up Error Messages The BIOS looks for any initialization message posted by the firmware during the start up sequence If a message is found one of the following errors displays on screen and the installation process aborts DAC960Pn fatal error memory test failed DAC960Pn fatal error command interface test failed DAC960Pn hardware error run diagnostics to pinpoint error DAC960Pn firmware checksum error reload firmware Drive Check Error Messages If the firmware finds a valid controller configuration but it doesn t match the SCSI drives currently installed one or more of the following messages display Unidentified device found at channel x Device identified for chn x tgt y found at chn x tgt y SCSI device at chn x tgt y not responding If any of the above messages are displayed the firmware will not proceed any further in the initialization process except to find other mismatches Then the BIOS prints out the following DAC960Pn Configuration Checksum error run configuration utility If the firmware detects that during the last power cycle the system was turned off abr
62. software from a disk or other storage device to help a computer start Burst Data Rate The speed at which a specific amount of data is sent or received in intermittent operations G 2 DAC960PG and DAC960PJ Installation Guide Glossary Bus A set of conductors that connect the functional units in a computer and are the channels through which data is transferred There are several types of bus channels including serial parallel PCI ISA EISA and MCA See also I O Bus Cables The physical wires copper or fibre optic over which electrical signals are transmitted Cables are used to connect peripherals such as disk arrays to computers and servers or to connect peripherals or components to each other Cache A temporary storage area for frequently accessed or recently accessed data Cache is used to speed up data transfer to and from a disk See also Caching Cache Flush Refers to an operation where all unwritten blocks in a Write Back Cache are written to the target disk This operation is necessary before powering down the system Cache Line Size Represents the size of the data chunk that will be read or written at one time and is set in conjunction with stripe size Under RAID EzAssist M the cache line size also known as Segment Size should be based on the stripe size you selected The default segment size for Mylex RAID controllers is 8K Caching Allows data to be stored in a pre designated area of a disk o
63. ss 2 1 SCSI Termination ae etlam noU REPRE 2 2 SCS Cabling sei E need blest CORRER 2 4 SCSI Drive Preparation esee 2 5 Mixing Narrow and Wide SCSI Devices A 2 5 Chapter 3 DAS Cea UNO EN 3 1 Before You EE 3 1 Connectors and Jumpers sessssseeeeeneeeen eene 3 2 External SCSI Connectors sss 3 3 Safety Considerations 0 0 eeeecceeseeeeteeeeeeeeeeeeeeaeeseeeseaeesseeeeaeeeeeeaas 3 4 Installing the Controller AAA 3 5 Chapter 4 Controller Start up oo ccc cece sss 4 1 BIOS Options Sequence sese 4 1 Setting BIOS Options ssssssseeen 4 2 BIOS Configuration Utility RAID EZASSist eseeeees 4 4 Operating System i rmt repr ah eed terrenis 4 4 Operating System Device Drivers sssssseeeee 4 4 Global Array Manager GAM Server sssssssseeseseissrereerserrsrsrrsrrsee 4 4 Global Array Manager GAM Client eseeeeeeeeeeeeeeeeeeereeeeseeerenee 4 5 In Case of Problems sesssseseeeeeeneennenenen nennen 4 5 Manual No 775012 V Appendix A Battery Backup Unit Option sss A 1 Product Description iere tee D PRU a RR A 1 Features er gege de cac tr te eem s A 1 Installation ee ies dite pe cercate alin eee A 2 Operation zeien tere ate bu ep A EE rt lec A 5 Battery Conditioning Prior to Use sseeeeeeee A 5 Set up Enabling the Write Back
64. t capable of assuming I O requests for another failed port on the loop During normal operation a failover port may be active or inactive Failover ports assume the same loop ID and optionally the same node from the failed port Failure A detectable physical change in hardware requiring replacement of the component Fast SCSI Devices that increases the speed at which data is transferred as opposed to the volume of data These devices use data rates up to 10 MHz Fast Wide SCSI SCSI devices using data rates up to 20 MHz Flash ROM Memory on an adapter containing software that can be reprogrammed without removing it from the board Format A pre established layout for data Programs accept data as input in a certain format process it and provide it as output in the same or another format AII data is stored in some format with the expectation that it will be processed by a program that knows how to handle that format Gigabit 10 1 000 000 000 bits Abbreviated as Gb Manual No 775012 G 7 Gigabyte 230 1 073 741 824 bytes Abbreviated as G or GB Global Array Manager GAM A Mylex RAID management utility that allows a system administrator to configure monitor and manage network RAID storage from anywhere in the world GAM can communicate critical notification via e mail fax pager SNMP or the launching of an application GAM is everything needed to manage Mylex PCI RAID Controllers SCSI Host Adapters and Exter
65. tended Industry Standard Architecture a bus standard for PCs extending the ZSA architecture to 32 bits and allowing more than one CPU to share the bus Embedded Storage Controller An intelligent storage controller that mounts in a host computer s housing and attaches directly to a host s memory bus with no intervening I O adapter or I O bus EPROM Erasable Programmable Read Only Memory memory which can be erased and re used eXtremeRAID A family of Mylex RAID controllers which offer uncompromising fault tolerance data availability superior configuration and management flexibility The eXtremeRAID family incorporates the latest performance technology by using the fastest processor on a PCI based RAID solution a 233 MHz RISC processor up to four 160MB sec Ultra 160 SCSI Ultra3 SCSI channels and a 64 bit PCI interface to provide eXtreme performance for servers The eXtremeRAID controllers use driver technology with which Mylex has won tpm C benchmarks worldwide With this technology the eXtremeRAID 1100 2000 and 3000 provide the highest performance and most flexible RAID solution available today G 6 DACO960PG and DAC960PJ Installation Guide Glossary Failback Restoring a failed system component s share of a load to a replacement component Failover A mode of operation for failure tolerant systems in which a component has failed and a redundant component has assumed its functions Failover Port A fibre channel por
66. uptly leaving some incomplete write operations the following message appears Recovery from mirror race in progress The following messages may also appear Adapter cannot recover from mirror race Some system drives are inconsistent Manual No 775012 C 1 Installation Abort During the initialization if the firmware fails to respond to the BIOS inquiry within two minutes the following message displays DAC960Pn not responding no drives installed The BIOS then inquires the firmware for its version number and other information and prints out the following message DAC960Pn firmware version x xx One or more of the following messages will be displayed if the firmware reports the following conditions Warning X system drives are offline Warning X system drives are critical Warning The following SCSI devices are dead chn X EGE Y No system drives found None installed X system drives installed The BIOS repeats the same process for additional RAID controllers present in the system Then it proceeds to boot if possible from the first system drive on the first controller Installation Abort With Firmware 4 x the installation aborted message is displayed when the BIOS finds that the configuration of the disk drives as stored in the NVRAM and configuration on disk is different from what it senses at boot time When this happens and a brand new installation is not being attempted the cause is often a fau
67. voltage drop it checks the status of the disk cache If the cache is empty the BBU does nothing If the cache contains data during a power failure the BBU will maintain cache data integrity until the power is restored When power is restored and the system finishes the bootstrap process the cache contents will be written to the disk array The cache contents will then be flushed from the cache Status Indication The status of the battery can be checked with the gas gauge feature that can be accessed in GAM version 2 1x or greater The gas gauge appears on the screen as two meters a battery power meter and a charge level meter each calibrated from 0 to 100 The battery power meter indicates the battery capacity in hours It will indicate a charge duration of up to 100 hours The firmware will detect the Mylex supplied SIMM and assign a value based upon the charge level of the battery and the power consumption rate of the SIMM A Caution Do not use SIMMs which are not supplied by Mylex The charge level meter displays the charge state of the battery expressed in percent 100 indicates a fully charged battery When the meter on the right indicates the battery is fully charged the meter on the left will indicate the maximum time in hours that the battery can be expected to maintain cache data integrity This value will vary depending upon which Mylex supplied SIMM is being used see Table A 1 W Note When the charge level i

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