Avago Technologies LSI20160 - Manual (Page 86)

4-18 Windows NT 4.0 Device Driver Installation
Copyright © 1993–2001 by LSI Logic Corporation. All rights reserved.
Problems with SCSI devices installation or operation.
If a SCSI device is not operating properly (either the device is not found
or a SCSI interface error occurs during scanning), it is possible that the
third party device drivers do not support the auto request sense feature
of LSI Logic host adapters. Disable the auto request sense feature as
described below and try the device operation again.
Step 1. To disable the auto request feature, use the SYMNO_AR.REG file
supplied with the SDMS driver files for Windows NT, either
double click the file in Windows Explorer/File Manager.
or
Type REGEDIT SYMNO_AR.REG at the command prompt.
This inserts a registry entry that disables the auto request
sense feature. The system must be rebooted for this change to
take effect.
Step 2. To re-enable the auto request sense feature, use the
SYM_AUTO.REG file and perform one of the update methods as
described in the preceding paragraph.
Problems with certain SCSI devices when using an Ultra SCSI
adapter.
Some SCSI devices do not function properly when the adapter attempts
to negotiate Ultra SCSI transfer rates. If a device is not operating
properly, check the transfer speed setting using the SDMS 4.XX SCSI
BIOS Configuration Utility (press
Ctrl-C when the LSI Logic SDMS PCI
BIOS banner appears during the system boot process). Devices that do
not support Ultra SCSI should be set to a maximum of 10 Mbytes/s for
8-bits, or 20 Mbytes/s for 16-bits.
Problems with Ultra SCSI devices using Ultra SCSI protocol.
•
If the system is configured with an LSI Logic host adapter that
supports Ultra SCSI and an Ultra SCSI device is on the SCSI bus,
intermittent problems and possible system crashes can occur if the
SCSI bus cable and terminators do not conform to the Ultra SCSI
specification.
•
Disable Ultra SCSI support for all devices using the SDMS 4.XX
SCSI BIOS Configuration Utility (press
Ctrl-C when the LSI Logic
PCI SCSI BIOS banner appears during the system boot process).