Dismounting an NTFS Volume May Cause Nonpaged Pool Memory Leak

Symptoms

If a volume is repeatedly mounted and dismounted, the NTFS file system may leak a small amount of nonpaged memory each time that the volume is dismounted. You can observe the leak in the NtFL pool tag by using PoolMon.exe.
For additional information about how to use PoolMon.exe, click the article number below to view the article in the Microsoft Knowledge Base:

177415 How to Use Poolmon to Troubleshoot Kernel Mode Memory Leaks

Cause

This issue occurs because of a problem in the code that supports NTFS transaction logging.

Resolution

A 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: Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.
The English version of this fix should have the following file attributes or later:

Date Time Version Size File name
--------------------------------------------------------
3/12/2001 05:55p 5.0.2195.3364 512,272 Ntfs.sys

Status

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

More Information

For additional information about how to obtain a hotfix for Windows 2000 Datacenter Server, click the article number below to view the article in the Microsoft Knowledge Base:

265173 The Datacenter Program and Windows 2000 Datacenter Server Product
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:

296861 Use QChain.exe to Install Multiple Hotfixes with One Reboot
An attempt to gain access to an unmounted volume indirectly causes the volume to be mounted. Therefore, a program might encounter this leak if the program dismounts a volume by using the DeviceIoControl() function with FSCTL_DISMOUNT_VOLUME IOCTL, and then attempts to gain access to the drive again later. The leak might also occur if one program dismounts the volume and another program causes the volume to be remounted (for example, in a "hot-swap" configuration).

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
Propriedades

ID do Artigo: 288899 - Última Revisão: 9 de jul de 2008 - Revisão: 1

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