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Q316743: A NetRAID 2 Controller May Cause Disk Error 21 in Windows NT 4.0

Article: Q316743
Product(s): Microsoft Windows NT
Version(s): 4.0,4.0 SP6a
Operating System(s): 
Keyword(s): kberrmsg kbhw
Last Modified: 06-AUG-2002

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The information in this article applies to:

- Microsoft Windows NT Server, Enterprise Edition versions 4.0, 4.0 SP6a 
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SYMPTOMS
========

During a Move Group or Failover process, the following error message may be
logged in the Cluster log:

  Physical Disk "<Driveletter>:" SCSI, error reserving disk, error 21.

This error message is the result of a regression fix from Windows NT 4.0 Service
Pack 6a (SP6a). This error message does not occur if you use the Clusdisk.sys
file from Windows NT 4.0 Service Pack 5 (SP5).

CAUSE
=====

Under certain conditions, the cluster disk driver (Clusdisk.sys) tries to attach
to physical disk devices but cannot read the partition table (assuming that the
disks are physical disk resources that are reserved by the other node). This
error message occurs because the Cluster service prevents the disk class driver
from correctly creating the volume objects.

RESOLUTION
==========

A supported fix is now available from Microsoft, but it is only intended to
correct the problem that is described in this article. Apply it only to systems
that are experiencing this specific problem.

To resolve this problem, contact Microsoft Product Support Services to obtain the
fix. For a complete list of Microsoft Product Support Services phone numbers and
information about support costs, visit the following Microsoft Web site:

  http://support.microsoft.com/default.aspx?scid=fh;EN-US;CNTACTMS

NOTE: In special cases, charges that are ordinarily incurred for support calls
may be canceled if a Microsoft Support Professional determines that a specific
update will resolve your problem. The usual support costs will apply to
additional support questions and issues that do not qualify for the specific
update in question.

The English version of this fix should have the following file attributes or
later:

  Date          Time    Version     Size     File name     
  -------------------------------------------------------
  18-Jan-2002   14:38   1.0.224.6   29,392   Clusdisk.sys



WORKAROUND
==========

To work around this problem, use the Clusdisk.sys file from SP5.

STATUS
======

Microsoft has confirmed that this is a problem in the Microsoft products that
are listed at the beginning of this article.

MORE INFORMATION
================

This problem may occur after you apply the Q305638 hotfix with the
Hewlett-Packard NetRAID 2M controller. For additional information, click the
article number below to view the article in the Microsoft Knowledge Base:

  Q305638 A Windows NT 4.0 Cluster Disk May Generate Error 3 During a Move
  Group or Failover Process

Additional query words: mscs hpnetraid

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Keywords          : kberrmsg kbhw 
Technology        : kbWinNTsearch kbWinNT400search kbWinNTSsearch kbWinNTSEntSearch kbWinNTSEnt400 kbWinNTS400search kbWinNTSEnt400SP6a
Version           : :4.0,4.0 SP6a
Issue type        : kbbug
Solution Type     : kbfix

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