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Back-to-Back Queue Full Problem in Scsiport.sys


The information in this article applies to:
  • Microsoft Windows 2000 Professional
  • Microsoft Windows 2000 Server
  • Microsoft Windows 2000 Advanced Server


SYMPTOMS

If the SCSIPort driver encounters multiple busy or queue full request completions, it attempts to requeue requests in the logical unit's Device queue. When this occurs, the SCSIPort driver expects to find the Device queue in a busy state. However, it is possible for the queue to be in a not-busy state if it was drained by delivering LuNextRequests to the miniport driver. When this error occurs, the SCSI bus resets.


RESOLUTION

A supported fix is now available from Microsoft, but it is only intended to correct the problem described in this article and should be applied only to systems experiencing this specific problem. This fix may receive additional testing at a later time, to further ensure product quality. Therefore, if you are not severely affected by this problem, Microsoft recommends that you wait for the next Windows 2000 service pack that contains this fix.

To resolve this problem immediately, download the fix as instructed below or contact Microsoft Product Support Services to obtain the fix. For a complete list of Microsoft Product Support Services phone numbers and information on support costs, please go to the following address on the World Wide Web:

http://support.microsoft.com/directory/overview.asp
The following file is available for download from the Microsoft Download Center:
[GRAPHIC: Download]Download Q276253_W2K_SP2_x86_en.exe now
For additional information about how to download Microsoft Support files, click the article number below to view the article in the Microsoft Knowledge Base:
Q119591 How to Obtain Microsoft Support Files from Online Services
Microsoft used the most current virus detection software available on the date of posting to scan this file for viruses. Once posted, the file is housed on secure servers that prevent any unauthorized changes to the file.

The English version of this fix should have the following file attributes or later:
   Date      Time    Version         Size    File name
   ------------------------------------------------------
   10/13/00  02:26p  5.00.2195.2487  72,432  Scsiport.sys 


STATUS

Microsoft has confirmed this to be a problem in the Microsoft products listed at the beginning of this article.


MORE INFORMATION

For additional information about how to install Windows 2000 and Windows 2000 hotfixes at the same time, click the article number below to view the article in the Microsoft Knowledge Base:

Q249149 Installing Microsoft Windows 2000 and Windows 2000 Hotfixes

Additional query words:

Keywords : kbenv kbtool kbWin2000SP2Fix
Issue type : kbbug
Technology : kbwin2000AdvServ kbwin2000AdvServSearch kbwin2000S kbwin2000Ssearch kbwin2000Search kbwin2000ProSearch kbwin2000Pro


Last Reviewed: January 30, 2001
© 2001 Microsoft Corporation. All rights reserved. Terms of Use.


Article ID: Q276253

Last Reviewed:
January 30, 2001

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