Dell powervault md3000i Installation And Troubleshooting Manual page 56

Virtual Disk Copy
Virtual Disk Copy generates a full copy of data from the source virtual disk to
the target virtual disk in a storage array. You can use Virtual Disk Copy to back
up data, copy data from disk groups that use smaller-capacity physical disks to
disk groups using greater-capacity physical disks, or restore Snapshot Virtual
Disk data to the source virtual disk.
To create a Virtual Disk Copy of a Microsoft Cluster shared disk:
1 Create a Snapshot Virtual Disk using the cluster shared disk as a source
disk.
2 Do not map that Snapshot Virtual Disk to any cluster node. Then, use
the newly created Snapshot Virtual Disk as the source disk for the
Virtual Disk Copy.
NOTE:
shared disk directly, the operation fails and displays the following error: The
operation cannot complete because the selected
virtual disk is not a source virtual disk candidate.
If the cluster shared disk fails and you need to restore it from the target virtual
disk, use Cluster Administrator to change the status of the cluster group
containing the failed disk to offline, and then use one of the following
methods:
1 Use Virtual Disk Copy to transfer the data from the target virtual disk to
the cluster shared disk.
2 Unassign the cluster shared disk from the host group and then map the
target virtual disk to the host group.
Understanding CHAP Authentication
Before proceeding to either "Configuring CHAP Authentication on the
Storage Array (Optional)" on page 58 or "Configuring CHAP Authentication
on the Host Server (Optional)" on page 59, it would be useful to gain an
overview of how CHAP authentication works.
What is CHAP?
Challenge Handshake Authentication Protocol (CHAP) is an optional iSCSI
authentication method where the storage array (target) authenticates iSCSI
initiators on the host server. Two types of CHAP are supported: target CHAP
and mutual CHAP .
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Preparing Your Systems for Clustering
When you attempt to create a Virtual Disk Copy of an Microsoft Cluster