Enabling SCSI-Tagged Command Queuing for NCR PCI SCSI Controller

This article was previously published under Q128931
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The NCR 53C810 PCI SCSI host adapter is built-in on most Dell computers andit supports SCSI-tagged command queuing. The SCSI-tagged command queuingallows a SCSI host adapter to send multiple SCSI commands to a devicebefore receiving a response for any of the commands. If this feature isdisabled (the Windows NT default), the SCSI host adapter must wait for acommand response before sending another. In some environments, enablingSCSI-tagged command queuing results in improved system performance.
To enable SCSI-tagged command queuing for the NCR 53C810 PCI SCSI hostadapter (using the NCRSDMS.SYS driver):
WARNING: Using Registry Editor incorrectly can cause serious, system-wideproblems that may require you to reinstall Windows NT to correct them.Microsoft cannot guarantee that any problems resulting from the use ofRegistry Editor can be solved. Use this tool at your own risk.

From the HKEY_LOCAL_MACHINE subtree

  1. Log on to Windows NT as an administrator.
  2. Start Registry Editor (REGEDT32.EXE).
  3. From the HKEY_LOCAL_MACHINE subtree, go to the following key:
  4. From the Edit menu, select Add Key.
  5. In the Key Name text box, type the following and then choose OK:
  6. Select the Device subkey.
  7. From the Edit menu, choose Add Value.
  8. Enter the following:

          Value Name: DriverParameter      Data Type:  REG_SZ      String:     UseTags=1						
  9. Exit Registry Editor and restart Windows NT.
For more information on the NCR 53C810 PCI SCSI host adapter, refer to theSCSI Device Driver Installation and Configuration Guide shipped with thecomputer or contact Dell Technical Support at (800) 284-1200.

The product included here is manufactured by Dell Computer Corporation, avendor independent of Microsoft; we make no warranty, implied or otherwise,regarding this product's performance or reliability.
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Article ID: 128931 - Last Review: 02/24/2014 08:19:43 - Revision: 3.2

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