Article ID: 323231 - View products that this article applies to.
This article was previously published under Q323231
This article has been archived. It is offered "as is" and will no longer be updated.
When you use Windows 2000 Disk Management to try to create or delete a logical drive in an extended partition after you upgrade from Microsoft Windows NT 4.0 to Windows 2000, you may receive the following error message:
After you receive this error message, logical disk partitions on the extended partition may be lost or damaged. This problem only occurs if one of the following conditions exists:
The Server Threw an Exception
This problem may occur because Windows 2000 does drive translation differently than Windows NT 4.0. Windows 2000 typically obtains disk geometry information for SCSI disks from the BIOS of the SCSI adapter for the disk. If the SCSI adapter BIOS is not turned on, Windows 2000 cannot obtain geometry information in this way and assumes that there are 255 heads and 63 sectors for each track.
Windows NT 4.0 performs the same kind of computation when geometry information is not available, but uses smaller default values for the number of heads (64) and sectors for each track (32).
The differences in disk geometry causes problems because Disk Management must modify several partition tables when it adds and removes logical drives.
Service Pack InformationTo resolve this problem, obtain the latest service pack for Microsoft Windows 2000. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/260910/EN-US/ )How to Obtain the Latest Windows 2000 Service Pack
Hotfix InformationA supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem.
If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, submit a request to Microsoft Customer Service and Support to obtain the hotfix.
Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site:
Apply this hotfix before you add or delete logical drives on the Windows 2000-based computer.
Date Time Version Size File name -------------------------------------------------------- Jul-25-2002 13:33 5.0.2195.5912 34,384 Claspnp.sys Jul-30-2002 14:26 5.0.2195.5986 30,288 Disk.sys
NOTE: To help recover the missing or damaged partition tables, you must contact Microsoft Product Support Services (PSS). For information about how to contact PSS, visit the following Microsoft Web site:
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article. This problem was first corrected in Microsoft Windows 2000 Service Pack 4.
For additional information about how to install multiple hotfixes with only one reboot, click the article number below to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/296861/EN-US/ )Use QChain.exe to Install Multiple Hotfixes with One Reboot
Article ID: 323231 - Last Review: February 27, 2014 - Revision: 3.9
Contact us for more help
Connect with Answer Desk for expert help.