Dell PowerVault MD3220 - Manual (Page 166)

166 Configuration: Premium Feature—Virtual Disk Copy
Creating a Virtual Disk Copy for an MSCS Shared
Disk
To create a virtual disk copy for a Microsoft Cluster Server (MSCS) shared
disk, create a snapshot of the virtual disk, and then use the snapshot virtual
disk as the source for the virtual disk copy.
NOTE: An attempt to directly create a virtual disk copy for an MSCS shared disk,
rather than using a snapshot virtual disk, fails with the following error: The
operation cannot complete because the selected virtual disk is not a source virtual
disk candidate.
NOTE: When creating a snapshot virtual disk, map the snapshot virtual disk to only
one node in the cluster. Mapping the snapshot virtual disk to the host group or both
nodes in the cluster may cause data corruption by allowing both nodes to
concurrently access data.
Virtual Disk Read/Write Permissions
After the virtual disk copy is complete, the target virtual disk automatically
becomes read-only to the hosts. The target virtual disk rejects read and write
requests while the virtual disk copy operation has a status of Pending or In
Progress or if the operation fails before completing the copy. Keep the target
virtual disk Read-Only enabled if you want to preserve the data on the target
virtual disk for reasons such as the following:
• If you are using the target virtual disk for backup purposes.
• If you are using the data on the target virtual disk to copy back to the
source virtual disk of a disabled or failed snapshot virtual disk.
If you decide not to preserve the data on the target virtual disk after the
virtual disk copy is complete, change the write protection setting for the
target virtual disk to Read/Write.
To set the target virtual disk read/write permissions:
1 In the AMW, select Virtual Disk Copy Manager.
The Copy Manager window is displayed.
2 Select one or more copy pairs in the table.
3 Perform one of these actions:
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