Microsoft KB Archive/160373

= Adaptec Aic78xx Does Not Issue Multiple Tagged Commands =

Article ID: 160373

Article Last Modified on 11/1/2006

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APPLIES TO


 * Microsoft Windows NT Workstation 4.0 Developer Edition
 * Microsoft Windows NT Server 4.0 Standard Edition

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This article was previously published under Q160373



SYMPTOMS
The AIC78xx SCSI controller on Windows NT 4.0 has very slow device access.



CAUSE
The AIC78xx.sys drive does not recognize the command queuing capabilities on the Adaptec 788xx device and, therefore, does not issue multiple commands.



STATUS
Microsoft has confirmed this to be a problem in Windows NT version 4.00. This problem has been corrected in the latest U.S. Service Pack for Windows NT version 4.00. For information on obtaining the Service Pack, query on the following word in the Microsoft Knowledge Base (without the spaces):

S E R V P A C K

Additional query words: prodnt SCSI Adaptec performance aic78xx.sys

Keywords: kbsetup KB160373

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