150 SANRAD V-Switch User Manual
You can view all snapshots of a single source volume using the CLI
command volume snapshot list.
volume snapshot list
You need one parameter to view a volume’s snapshots:
SWITCH PARAMETER DEFINITION STATUS EXAMPLE
-vol
VOLUME SNAPSHOT SOURCE
VOLUME
MANDATORY
Mirror7
Example:
Table 28 lists the only snapshot for Mirror7.
volume snapshot list –vol Mirror7
Table 28: All Snapshots of a Specific Volume
Snapshot Date & Time Utilization
Snp1Mir1 12/12/02 20:00:00 20%
Breaking a Mirror
If you are working in
a V-Switch cluster,
the child must be
removed on both V-
Switches.
You can remove one of multiple children from a mirror or break a two-
child mirrored volume to enable one or both of the children to be used
independently. The removed child is a fully functional volume and can be
exposed to any host. In particular, the removed child can be used for
testing, online server-free backup or online data migration.
If you break a mirrored volume that is attached to a LUN, the remaining
volume retains the attached LUN. Write operations to the source volume
can continue while the mirror is being broken or a child removed but the
removed child’s data cannot be guaranteed to mirror the source volume.
Therefore, all write operations should be suspended appropriately before
breaking a mirror.
A mirror cannot be broken or a child removed if one of the volumes needs
to be synchronized or it is in the process of synchronizing or copying.
In Figure 81, page 151, a child is removed from a mirrored volume with
three children. If the mirrored volume is exposed, it remains functional as a
mirrored volume and all read-write operations are executed.
