Microsoft KB Archive/316743

= A Hewlett-Packard NetRAID 2 Controller May Cause Disk Error 21 in a Windows NT 4.0 Cluster =

Article ID: 316743

Article Last Modified on 11/1/2006

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APPLIES TO


 * Microsoft Windows NT Server 4.0 Enterprise Edition
 * Microsoft Windows NT 4.0 Service Pack 6a

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This article was previously published under Q316743



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

Physical Disk &quot; :&quot; 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 computers 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:

305638 A Windows NT 4.0 Cluster Disk May Generate Error 3 During a Move Group or Failover Process

Additional query words: mscs hpnetraid

Keywords: kbhotfixserver kbqfe kbbug kberrmsg kbfix kbqfe KB316743

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