Dell POWERVAULT MD3600I - Manual (Page 162)

1. In the AMW, select the Storage & Copy Services tab, select a snapshot virtual disk.
2. Select Copy services → Virtual Disk → Snapshot → Re-create.
3. Type yes, and click OK.
Disabling A Snapshot Virtual Disk
Disable a snapshot virtual disk if one of the following conditions exists:
• You do not need the snapshot now.
• You intend to re-create the snapshot at a later time and want to retain the associated snapshot repository virtual
disk so that you do not need to create it again.
• You want to maximize storage array performance by stopping copy-onwrite activity to the snapshot repository
virtual disk.
NOTE: If you do not intend to re-create the snapshot virtual disk at a later time, in the object tree, select the
snapshot virtual disk, and select Virtual Disk → Delete to remove it. The associated snapshot repository virtual disk
is also removed. See the online help topics for more information on removing a snapshot virtual disk.
NOTE: The SMdevices utility displays the snapshot virtual disk in its output, even after the snapshot virtual disk is
disabled.
To disable a snapshot virtual disk:
1. In the AMW, select the Storage & Copy Services tab, select the snapshot virtual disk, and select Copy Services →
Snapshot Virtual Disk → Disable.
2. In the text box, type yes and click OK.
The snapshot virtual disk is disabled. The associated snapshot repository virtual disk does not change status. The
copy-on-write activity to the snapshot repository virtual disk stops until the snapshot virtual disk is recreated.
Preparing Host Servers To Re-Create A Snapshot Virtual Disk
NOTE: Before you create a new snapshot of a source virtual disk, stop any data access (I/O) activity or suspend
data transfer to the source virtual disk and snapshot virtual disk to ensure that you capture an accurate snapshot
of the source virtual disk. Close all applications, including Windows Internet Explorer, to make sure all I/O activity
has stopped.
NOTE: Removing the drive letter of the associated virtual disk in Windows or unmounting the virtual drive in Linux
helps to guarantee a stable copy of the drive for the Snapshot.
Before re-creating a snapshot virtual disk, both the host server and the associated virtual disk you are re-creating have
to be in the proper state.
To prepare your host server and virtual disk:
1. Stop all I/O activity to the source and snapshot virtual disk (if mounted).
2. Using your Windows system, flush the cache to both the source and the snapshot virtual disk (if mounted). At the
host prompt, type SMrepassist -f <filename-identifier> and press <Enter>.
For more information, see
SMrepassist Utility .
3. Click the Summary tab, then click View Storage Array Profile to verify if the snapshot virtual disk is in Optimal or
Disabled status.
4. Remove the drive letter(s) of the source and (if mounted) snapshot virtual disk in Windows or unmount the virtual
drive(s) in Linux to help guarantee a stable copy of the drive for the Snapshot. If this is not done, the snapshot
operation reports that it has completed successfully, but the snapshot data is not updated properly.
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