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Computer Hangs Accessing Removable Disk Such as Magneto-Optical Disk

The information in this article applies to:
  • Microsoft Windows Millennium Edition


When Windows accesses magneto-optical disks (or other removable media on which the block size can vary), your computer may stop responding (hang) or behave erratically. This issue occurs only if there is no disk in the drive when Windows starts.


This problem occurs because some drives (such as magneto-optical drives) support different block sizes depending on the media that is inserted. There is a problem with handling a change in block size, which can cause the system to corrupt code or data. Having the media in the drive prevents this problem from occurring if media with the same block size is used.


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.

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 on support costs, please go to the following address on the World Wide Web:
NOTE: In special cases, charges that are normally incurred for support calls may be canceled, if a Microsoft Support Professional determines that a specific update will resolve your problem. Normal 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  
   08-09-00  05:00pm  10,140  Diskvsd.vxd 


To work around this issue, ensure that a disk is inserted in the drive before Windows starts, and make sure that any other disks used in the drive are of the same block size.


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

Additional query words:

Keywords : kbWinME
Issue type : kbprb
Technology : kbWinMEsearch kbWinME

Last Reviewed: February 23, 2001
© 2001 Microsoft Corporation. All rights reserved. Terms of Use.

Article ID: Q271277

Last Reviewed:
February 23, 2001

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