Veritas Volume Manager 5.0.1 Administrator's Guide, HP-UX 11i v3, First Edition, November 2009

To create and manage a third-mirror break-off snapshot

To create the snapshot, you can either take some of the existing ACTIVE plexes

in the volume, or you can use the following command to add new snapshot

mirrors to the volume:

# vxsnap [-b] [-g diskgroup] addmir volume [nmirror=N] \

[alloc=storage_attributes]

By default, the vxsnap addmir command adds one snapshot mirror to a

volume unless you use the nmirror attribute to specify a different number

of mirrors. The mirrors remain in the SNAPATT state until they are fully

synchronized. The -b option can be used to perform the synchronization in

the background. Once synchronized, the mirrors are placed in the SNAPDONE

state.

For example, the following command adds 2 mirrors to the volume, vol1, on

disks mydg10 and mydg11:

# vxsnap -g mydg addmir vol1 nmirror=2 alloc=mydg10,mydg11

If you specify the -b option to the vxsnap addmir command, you can use the

vxsnap snapwait command to wait for synchronization of the snapshot

plexes to complete, as shown in this example:

# vxsnap -g mydg snapwait vol1 nmirror=2

Administering volume snapshots

Creating instant snapshots

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