When you restore a clustered disk from a Volume Shadow Copy Service (VSS) transportable snapshot in Windows Server 2008, you have to restore the VSS transportable snapshot to logical unit numbers (LUNs) that are different from the original LUNs.
For example, in remote failure recovery, you have to re-create the cluster at another site by using the VSS snapshots because the cluster does not exist at this other site. After you create the LUNs from snapshots and bring the LUNs online, the disk resources do not join the cluster.
Note Similar problems can occur in nonclustered situations.
After you apply this hotfix, a new input and output control (IOCTL), IOCTL_DISK_RESET_SNAPSHOT_INFO, is available to convert new LUNs that are made from VSS transportable shadow copies. You can use the IOCTL against the new LUNs before you bring them online. Details about IOCTL_DISK_RESET_SNAPSHOT_INFO IOCTL are documented on the Microsoft Developer Network (MSDN) Web site.
Note One side effect of using this IOCTL is that Disk Management tools will now report an additional partition on GPT disks of the type "UNKNOWN." This 256KB partition is created by using the IOCTL and is the Snapshot partition that is used in the restore process. The partition is expected and can be ignored by system administrators.
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.
No prerequisites are required.
You must restart the computer after you apply this hotfix.
Hotfix replacement information
This hotfix replaces hotfixes that are documented in the following Microsoft Knowledge Base articles:
954475 After you restore a clustered disk from a VSS transportable hardware snapshot in a Windows Server 2008 cluster, the clustered disk cannot come online
955565 The Plug and Play Manager may not receive removal relations that are reported by a disk filter driver on a Windows Server 2008-based computer
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 Vista and Windows Server 2008 file information notes
The files that apply to a specific product, milestone (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table.
Windows Vista SP1 and Windows Server 2008 SP1
The MANIFEST files (.manifest) and MUM files (.mum) installed for each environment are listed separately. MUM and MANIFEST files, and the associated security catalog (.cat) files, are critical to maintaining the state of the updated component. The security catalog files (attributes not listed) are signed with a Microsoft digital signature.
For all supported x86-based versions of Windows Server 2008
For all supported x64-based versions of Windows Server 2008
For all supported Itanium-based versions of Windows Server 2008
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates
Additional file information for Windows Server 2008
Additional files for all supported x86-based versions of Windows Server 2008
Windows Server 2008 Enterprise, Windows Server 2008 Datacenter, Windows Server 2008 Enterprise without Hyper-V, Windows Server 2008 Datacenter without Hyper-V, Windows Server 2008 for Itanium-Based Systems