Dell powervault md3000i Installation And Troubleshooting Manual page 55

create a snapshot for your cluster disk. The Snapshot Virtual Disk can be
mapped to the primary node (the node owning the source disk) or the
secondary node (the node not owning the source disk) for backup, testing, or
data processing.
NOTICE:
Avoid mapping the Snapshot Virtual Disk to more than one node in the
cluster at any point of time. The Snapshot Virtual Disk is not managed by Cluster
Administrator/Failover Cluster Manager, so mapping the Snapshot Virtual Disk to
the host group or both nodes in the cluster may allow both nodes to access data
concurrently and thus cause data corruption.
To map the Snapshot Virtual Disk to the primary node:
1 Use Host-to-Virtual Disk Mapping in the Modular Disk Storage Manager.
This ensures that a different disk signature is assigned properly to the
Snapshot Virtual Disk.
2 Use Windows Disk Management to re-scan for the Snapshot Virtual Disk,
assign the drive letter, and start accessing the drive.
NOTE:
Disk to be detected by Windows Disk Management. If the Snapshot Virtual
Disk is not detected, wait for a few minutes and re-scan the disks. Repeat the
process until the Snapshot Virtual Disk is detected; do not reboot the server.
If you need to map the Snapshot Virtual Disk to the secondary node (the
node not owning the source disk), you must map the Snapshot Virtual Disk to
the primary node first, to ensure that the snapshot is assigned a new disk
signature. Then, use Modular Disk Storage Manager to unmap the Snapshot
Virtual Disk from the primary node, map it to the secondary node, and start
accessing it.
NOTICE:
Attempts to map the Snapshot Virtual Disk to the secondary node, prior to
obtaining the signature from the primary node, may cause the operating system to
misidentify the Snapshot Virtual Disk as an existing system volume and that may
result in data loss or an inaccessible Snapshot Virtual Disk.
NOTE:
For a cluster configuration with multiple Snapshot Virtual Disks, each virtual
disk must be mapped to the node owning the associated source disk first. The
primary node for a Snapshot Virtual Disk may not be the primary node for another
Snapshot Virtual Disk.
The disks may be re-scanned several times for the Snapshot Virtual
Preparing Your Systems for Clustering
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