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Article ID: 260834 - Last Review: October 20, 2013 - Revision: 3.3

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When a volume is mounted but is not assigned a driver letter, the wrong amount of free space is displayed in System Monitor.


Logical drives have internal names of the form "volume\etcetc". For any logical drive that has an identifier of the form "c:\", this simple name is looked up in a table and used in the performance registry as the name that System Monitor recognizes. If no name of the type "c:\" is assigned to the drive, the drive is not referenced and the data collector uses the wrong drive. This may cause the wrong volume size to be reported.


To resolve this problem, obtain the latest service pack for Windows 2000. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
260910  ( ) How to Obtain the Latest Windows 2000 Service Pack
The English version of this fix should have the following file attributes or later:
   Date        Time      Version        Size     File name
   06/21/2000  10:38 PM  5.0.2195.2096  22.7 KB  Perfdisk.dll


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 Windows 2000 Service Pack 2.


For additional information about how to install Windows 2000 and Windows 2000 hotfixes at the same time, click the article number below to view the article in the Microsoft Knowledge Base:
249149  ( ) Installing Microsoft Windows 2000 and Windows 2000 Hotfixes
This fix also changes the naming convention for drives in System Monitor without a drive letter. Before this change, the global unique ID (GUID) is displayed for the volume. After this change, the volume name is displayed (that is, HarddiskVolumeN, where N is the volume number).

  • Microsoft Windows 2000 Server
  • Microsoft Windows 2000 Advanced Server
  • Microsoft Windows 2000 Professional Edition
kbnosurvey kbarchive kbhotfixserver kbqfe kbbug kbfix kbperformance kbwin2000presp2fix KB260834
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