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5.439 bytes |
Service Hints & Tips |
Document ID: MCGN-3UFGYQ |
Servers - Performance enhancements for ServeRAID I and II adapters
Applicable to: United States
Symptoms
Slow performance of the ServeRAID I and II Disk subsystem.
Fix
Performance enhancements for the ServeRAID I Adapter, ServeRAID II Adapter, and ServeRAID II Onboard Controller can be achieved (and not limited to) as follows:
1- The "IBM ServeRAID and ServeRAID II BIOS Flash Diskette version 2.70 and later"* offers several performance enhancements for RAID Levels 1, and 5 on the ServeRAID II Adapter.
2- Changing the Write Policy to Write-Back Mode will improve performance for RAID Levels 0, 1, and 5 with RAID 5 yielding the greatest performance of the ServeRAID II Adapter / Controller.
Adjustment of the Write Policy will improve performance for RAID Levels 0, 1, and 5 on the ServeRAID I and ServeRAID II Controller.
3- Selecting the optimum Stripe Unit size with respect to the System I/O Request will maximize overall performance of the ServeRAID I and ServeRAID II Controller.
Note: The Users Guide that shipped with the System or Option as well as the HMM (Hardware Maintenance Manual) for the System lists existing ways (to include item 2 and 3 above) to increase performance of the ServeRAID I and ServeRAID II Adapters and the Onboard ServeRAID II Controller.
Refer to the HMM (Hardware Maintenance Manual) p/n10L9147, publication S10L-9147-00 for additional information on the ServeRAID I and ServeRAID II Controller.
*Note: The "IBM ServeRAID and ServeRAID II BIOS and Flash diskette version 2.70 or later" is available at the IBM Web Site at the following URL:
http://www.pc.ibm.com/us/files.html
- Select "Search"
- Type "BIOS 2.70" in the keywords box
- Select "Search"
- Select the Readme file associated with the "IBM ServeRAID and ServeRAID II BIOS and Flash diskette version 2.70"
- Print out the contents for directions to apply the BIOS update and Firmware Flash
- Select the "IBM ServeRAID and ServeRAID II BIOS and Flash diskette version 2.70" to download (the diskette is a self-extracting executable file that will create a bootable diskette).
SAS KEYWORDS:
PSY2, UNCLASSIFIED, D/T8638, D/T8640, D/T8641, D/T8642, D/T8650, D/T8651, D/T8644, MICROCODE, STRIPE SIZE, WRITE-BACK, BIOS, FIRMWARE, 2.70, SERVERAID, SERVERAID I, SERVERAID II, H163649
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Search Keywords |
PSY2, UNCLASSIFIED, D/T8638, D/T8640, D/T8641, D/T8642, D/T8650, D/T8651, D/T8644, MICROCODE, STRIPE SIZE, WRITE-BACK, BIOS, FIRMWARE, 2.70, SERVERAID, SERVERAID I, SERVERAID II, H163649 | |
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Hint Category |
RAID, Retain | |
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Date Created |
13-05-98 | |
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Last Updated |
11-02-99 | |
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Revision Date |
11-02-2000 | |
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Brand |
IBM PC Server | |
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Product Family |
Netfinity 3500, Netfinity 7000, PC Server 315, PC Server 330, PC Server 520, PC Server 704, PC Server 720, ServeRAID | |
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Machine Type |
8644, 8651, 8638, 8640, 8641, 8650, 8642, Various | |
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Model |
10U; 10X; 20U; 20X; 21U; 21X; 30U; 30X; A0U; B0U; B1U; RH0; RM0; TH0; TM0; XH0; XM0; YH0; YM0; KJ0; KS0; PJ0; PS0; PSV; PSW; ZJ0; ZS0; ZSV; ZSW; 11Y; 21Y; B1Y; EM2; ES0; ES2; ESS; PB0; PM0; PT0; XM2; XS0; YS0; YSS; Z1Y; ZB0; ZM0; ZT0; 41Y; 4Y2; 4Y3; 4Y4; 4Y5; 4Y6; 4YQ; 4YR; 4YS; 4YZ; 5Y1; 5Y7; 5YA; 5YF; 5YG; 5YH; ED2; EDG; EE0; EE1; EEE; EEL; EZ0; EZ1; EZE; EZS; EZV; MD0; MD2; MDG; MZ0; MZE; MZL; MZS; MZV; RE0; RE1; REE; 4BW; 4M0; 5AX; 5BW; 5M0; 5M5; 6MM; 7AX; 7M0; 7MM; 0D0; 0DN; 0E1; 0EN; 0Z0; 1Z0; 2DS; 2E1; 2ZS; 4D0; 4DN; 4DS; 4E1; 4E4; 4EN; 4Y1; 4Y2; 4Y3; 4Y4; 4ZS | |
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TypeModel |
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Retain Tip (if applicable) |
H163649 | |
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Reverse Doclinks |
Date last altered: A98/09/09, Owning B.U.: USA |