Veritas Storage Foundation Intelligent Storage Provisioning 5.0.1 Administrators Guide, HP-UX 11i v3, First Edition, November 2009

To create and manage a linked break-off snapshot

Use the following command to link the prepared snapshot volume, snapvol,

to the data volume:

# vxsnap [-g diskgroup] [-b] addmir volume mirvol=snapvol \

[mirdg=snapdg]

The optional mirdg attribute can be used to specify the snapshot volume’s

current disk group, snapdg. The -b option can be used to perform the

synchronization in the background. If the -b option is not specified, the

command does not return until the link becomes ACTIVE.

For example, the following command links the prepared volume, prepsnap,

in the disk group, mysnapdg, to the volume, vol1, in the disk group, mydg:

# vxsnap -g mydg -b addmir vol1 mirvol=prepsnap \

mirdg=mysnapdg

After the -b option is specified, you can use the vxsnap snapwait in the next

command to wait for the synchronization of the snapshot plexes or linked

snapshot volume to complete, as shown in the following example:

# vxsnap -g mydg snapwait vol1 mirvol=prepsnap \

mirdg=mysnapvoldg

To create a linked break-off snapshot, use the following form of the vxsnap

make command:

# vxsnap [-g diskgroup] make source=volume/snapvol=snapvol\

[/snapdg=snapdiskgroup]

The snapdg attribute must be used to specify the snapshot volume’s disk

group if this is different from that of the data volume.

For example, to use the prepared volume, prepsnap, as the snapshot for the

volume, vol1, in the disk group, mydg, use the following command:

# vxsnap -g mydg make \

source=vol1/snapvol=prepsnap/snapdg=mysnapdg

Use fsck (or some utility appropriate for the application running on the

volume) to clean the temporary volume’s contents.

For example, you can use the following command with a VxFS file system:

# fsck -F vxfs /dev/vx/rdsk/diskgroup/snapshot

115Administering instant snapshots

Creating instant snapshots