Microsoft KB Archive/247687

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Incorrect Partition Size May Be Reported After You Create Volume Set

Article ID: 247687

Article Last Modified on 11/1/2006


  • Microsoft Windows NT Workstation 4.0 Developer Edition
  • Microsoft Windows NT Server 4.0 Standard Edition

This article was previously published under Q247687

IMPORTANT: This article contains information about modifying the registry. Before you modify the registry, make sure to back it up and make sure that you understand how to restore the registry if a problem occurs. For information about how to back up, restore, and edit the registry, click the following article number to view the article in the Microsoft Knowledge Base:

256986 Description of the Microsoft Windows Registry


If you do not immediately restart your computer after you create a volume set using the Disk Administrator tool, the computer may not properly report the correct partition size.


WARNING: If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.

To resolve this problem, modify the BootExecute registry value to start the Autochk tool when restarting your computer:

  1. Start Registry Editor (Regedt32.exe).
  2. Locate the BootExecute value under the following registry key:

    HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Session Manager

  3. On the Edit menu, click Multi String, put the cursor at the end of the value "autocheck autochk *", and then press ENTER. On the next line type autochk /x D: where D: is the drive letter of the drive being extended, and then click OK.

    NOTE: The default value is the single string "autocheck autochk *".
  4. Quit Registry Editor.

When you restart your computer, Autochk creates or extends (as necessary) the volume set, and updates the file system boot partition. The volume set then reports the correct size.

Additional query words: ftdisk volumeset autochk windisk

Keywords: kbenv kbnetwork kbprb KB247687