On a computer that is running Windows Server 2008 R2 or Windows 7, you create two volumes on some dynamic disks.
You configure one volume to store the shadow copy storage area (also known as "diff area") of the other volume.
You enable the Snapshot Protection mode on both volumes.
You create snapshots at set intervals. After a while, the volume that has its shadow copy storage area stored on the other volume goes offline because the storage space on the volume that stores the shadow copy storage area is used up.
You extend the volume that has used up its storage space, and you try to bring the volume that has its shadow copy storage area stored on the other volume online.
In this scenario, you cannot bring the volume that has its shadow copy storage area stored on the other volume online. Additionally, you receive the following events in the System log:
Log Name: System Source: volsnap Event ID: 87 Level: Error Computer: ComputerName Description: Volume volume is offline for shadow copy protection. The shadow copy storage has been exhausted. Please try clearing the protection fault or restart the computer followed by an increase of the shadow copy storage or a removal of unneeded shadow copies. If all else fails, revert out of shadow copy protection mode to reclaim the use of the volume while losing the shadow copies.
Event Source: VolSnap Event Category: None Event ID: 88 Computer: ComputerName Description: The shadow copy of volume <volume> is offline for shadow copy protection. The shadow copy storage was used up before conditions permitted it to increase. Try clearing the protection fault or restart the computer. If it still fails, revert out of shadow copy protection mode to reclaim the use of the volume while losing the shadow copies.
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 the problem described in this article. 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.
To apply this hotfix, you must be running Windows Server 2008 R2.
To use the hotfix, you do not have to change the registry.
You do not have to restart the computer after you apply this hotfix.
Hotfix replacement information
This hotfix does not replace a previously released hotfix.
The global version of this hotfix installs files that have the attributes that are listed in the following tables. The dates and the times for these files are listed in Coordinated Universal Time (UTC). The dates and the times for these files on your local computer are displayed in your local time together with your current daylight saving time (DST) bias. Additionally, the dates and the times may change when you perform certain operations on the files.
Windows Server 2008 R2 file information notes
Important Windows 7 hotfixes and Windows Server 2008 R2 hotfixes are included in the same packages. However, hotfixes on the Hotfix Request page are listed under both operating systems. To request the hotfix package that applies to one or both operating systems, select the hotfix that is listed under "Windows 7/Windows Server 2008 R2" on the page. Always refer to the "Applies To" section in articles to determine the actual operating system that each hotfix applies to.
The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are listed separately in the "Additional file information for Windows Server 2008 R2 and for Windows 7" section. MUM and MANIFEST files, and the associated security catalog (.cat) files, are extremely important to maintaining the state of the updated component. The security catalog files, for which the attributes are not listed, are signed with a Microsoft digital signature.
For all supported x86-based versions of Windows 7
For all supported x64-based versions of Windows 7 and of Windows Server 2008 R2
For all supported IA-64-based versions of Windows Server 2008 R2
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
For more information about the Volume Shadow Copy Service, visit the following Microsoft TechNet website:
Windows Server 2008 R2 Datacenter, Windows Server 2008 R2 Enterprise, Windows Server 2008 R2 Standard, Windows 7 Enterprise, Windows 7 Home Basic, Windows 7 Home Premium, Windows 7 Professional, Windows 7 Starter, Windows 7 Ultimate