SANRAD V-Switch manual Breaking a Mirror, Volume snapshot list -vol Mirror7, 150

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	MANDATORY	Mirror7
		VOLUME
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%

If you are working in

aV-Switch cluster, the child must be

removed on both V- Switches.

Breaking a Mirror

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.

150 SANRAD V-Switch User Manual