Microsoft KB Archive/195541

= Large Number of Mounts/Dismounts on an NTFS Partition Causes a Memory Leak =

Article ID: 195541

Article Last Modified on 11/1/2006

-

APPLIES TO


 * Microsoft Windows NT Workstation 4.0 Developer Edition
 * Microsoft Windows NT Server 4.0 Standard Edition
 * Microsoft Windows NT Server 4.0 Enterprise Edition

-



This article was previously published under Q195541



SYMPTOMS
A system may leak nonpageable memory when a large amount of mounts and dismounts are done on an NTFS partition.



CAUSE
The driver Ntfs.sys does not keep track of a VPB structure if a dismount request is followed by an unlock request. The memory leak is small, so the problem will usually appear after a period of days. POOLMON can be used to check this problem. Look for the NtfV tag taking up a lot of the nonpageable memory. Performance Monitor can also be used to monitor nonpageable memory use.



RESOLUTION
To resolve this problem, obtain the latest service pack for Windows NT 4.0. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

152734 How to Obtain the Latest Windows NT 4.0 Service Pack



STATUS
Microsoft has confirmed this to be a problem in Windows NT version 4.0. This problem was first corrected in Windows NT version 4.0 Service Pack 5.

Additional query words: 4.00

Keywords: kbhotfixserver kbqfe kbbug kbfix kbqfe KB195541

-

[mailto:TECHNET@MICROSOFT.COM Send feedback to Microsoft]

© Microsoft Corporation. All rights reserved.