An application stops responding when the Single Instance Store (SIS) Filter driver is installed and the application calls the FSCTL_DISMOUNT_VOLUME control code to dismount a volume in Windows Server 2003 or in Windows 2000 Server

An application may stop responding if the following conditions are true:

• The Single Instance Store (SIS) Filter driver is installed on the computer.
• The application calls the FSCTL_DISMOUNT_VOLUME control code to dismount a volume.

The issue occurs because of a bug in the Sis.sys filter driver. When this issue occurs, the filter is waiting for an event that is never signaled.

Hotfix Information for Windows Server 2003

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. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

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, contact 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.

Prerequisites

This hotfix requires Microsoft Windows Server 2003 to be installed on the computer.

Restart requirement

You have to restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any other hotfixes.

File information

The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.

Windows Server 2003, x86-based versions

Windows Server 2003, Itanium-based versions

Hotfix Information for Windows 2000 Server

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.

Prerequisites

This hotfix requires Microsoft Windows 2000 Server Service Pack 3 to be installed on the computer.

Restart requirement

You have to restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any other hotfixes.

File information

The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.

Windows Server 2000 with Service Pack 3

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

The Single Instance Storage Filter is a file system filter that manages the duplicate copies of files on hard-disk volumes. This filter copies one instance of the duplicate file into a central folder. The duplicates are replaced with a link to the central copy to improve disk usage. This Single Instance Storage Filter service cannot be stopped. If this service is disabled, the linked files cannot be accessed. If the central folder is deleted, the linked files can become permanently inaccessible.

The Single Instance Store (SIS) service is used by Remote Installation Server (RIS) to reduce disk space by combining duplicate files.
For more information about SIS , click the following article number to view the article in the Microsoft Knowledge Base:
For more information about the FSCTL_DISMOUNT_VOLUME control code, visit the following Web site:http://msdn2.microsoft.com/en-gb/library/aa364562.aspx