Using the Snapshot Feature 77
When you stop the copy-on-write operations for a specific snapshot virtual
disk, only that snapshot virtual disk is disabled. All other snapshot virtual
disks remain in operation.
Re-creating the Snapshot Virtual Disk
To restart a copy-on-write operation, use the recreate snapshot virtualDisk
command. This command starts a fresh copy-on-write operation using an
existing snapshot virtual disk. When you restart a snapshot virtual disk, the
snapshot virtual disk must have either an Optimal or a Disabled state.
The following conditions then occur:
• All copy-on-write data previously on the snapshot repository virtual disk is
• Snapshot virtual disk and snapshot repository virtual disk parameters
remain the same as the previously disabled snapshot virtual disk and
snapshot repository virtual disk. You can also change the
parameters when you restart
the snapshot virtual disk.
• The original names for the snapshot repository virtual disk are retained.
Preparing Host Servers to Re-create a Snapshot Virtual Disk
CAUTION: Before you create a new point-in-time image 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 point-in-time
image 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 server and the associated
virtual disk you are re-creating have to be in the proper state. To ensure that
the host server is properly prepared to re-create a snapshot virtual disk, you
can either use an application to carry out this task, or you can perform the
Stop all I/O activity to the source and snapshot virtual disk (if mounted).
Using your Windows system, flush the cache to both the source and the
snapshot virtual disk (if mounted). At the host prompt, type
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