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4.010 bytes |
Service Hints & Tips |
Document ID: RMIE-3DDCTC |
Servers - Runs slow while mirroring with NetWare
Applicable to: World-Wide
SYMPTOM:
While mirroring or duplexing with NetWare, the server runs slowly. Performance is degraded.
PROBLEM ISOLATION AIDS:
The system is a PC Server with one or more of the following Adaptec SCSI Adapters / Controller installed:
- FRU p/n06H5250 or FRU p/n 06H9610 PCI Fast SCSI-2 adapter
- FRU p/n06H6431 or FRU p/n06H8574 (Option p/n94G3771 or p/n94G4673) PCI 2940W Wide adapter
- FRU p/n60H7823 (Option p/n76H5407) 2940UW Ultra-wide adapter
- A Onboard SCSI Adapter using the 7870 Chipset
The Operating System is NetWare 3.1x or 4.1x with mirroring OR duplexing enabled.
FIX:
Edit the STARTUP.NCF so the loading of the Adaptec device drivers are as follows:
For Duplexing:
load aic7870.dsk slot=xx read_after_write=1 (primary drive)
load aic7870.dsk slot=xx read_after_write=0 (mirrored drive)
For Mirroring:
load aic7870.dsk slot=xx read_after_write=0
By default (no parameters), read after write verification is ENABLED for the aic7870.dsk device driver.
By using the "read_after_write=0" parameter, read after write verification is DISABLED and system performance is improved.
Read after write verification will appear "DISABLED" for the mirrored drive on the NetWare Monitor (Disk Information) screen
when "read_after_write=0" is used as the parameter.
Adaptec is a trademark of Adaptec, Inc.
NetWare is a trademark of Novell, Inc.
SAS KEYWORDS:
PSY2, UNCLASSIFIED, PSY2COMM, PSY2OPER, PSY2PROG, PSY2ADAPT, D/T8639, D/T8641, D/T8642, D/T8650, 8639, 8640, 8642, 8650, 300, 310, 320, 325, 330, 500, 520, 720, 704, 76H5407, 06H6431, 06H8574, 94G4673, DUPLEX, MIRROR, 94G3771, 06H5250, 8641, 06H9610, 60H7823, HEALTH, D/T8640, ONBOARD, ADAPTER, 7870, H136094
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Search Keywords |
PSY2, UNCLASSIFIED, PSY2COMM, PSY2OPER, PSY2PROG, PSY2ADAPT, D/T8639, D/T8641, D/T8642, D/T8650, 8639, 8640, 8642, 8650, 300, 310, 320, 325, 330, 500, 520, 720, 704, 76H5407, 06H6431, 06H8574, 94G4673, DUPLEX, MIRROR, 94G3771, 06H5250, 8641, 06H9610 | |
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Hint Category |
Retain, NetWare | |
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Date Created |
16-01-97 | |
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Last Updated |
12-06-98 | |
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Revision Date |
11-06-99 | |
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Brand |
IBM PC Server | |
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Product Family |
PC Server 300, PC Server 310, PC Server 320, PC Server 325, PC Server 330, PC Server 500, PC Server 520, PC Server 704, PC Server 720 | |
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Machine Type |
8640, 8639, 8641, 8650, 8642 | |
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Model |
ALL | |
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TypeModel |
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Retain Tip (if applicable) |
H136094 | |
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Reverse Doclinks |
Date last altered: A98/06/10, Owning B.U.: USA, |