Veritas FlashSnap Point-In-Time Copy Solutions 5.0 AdministratorÆs Guide, HP-UX 11i v3, First Edition, May 2008

45Off-host cluster file system backup
Using off-host processing to back up cluster file systems
7 The snapshot volume is initially disabled following the split. Use the
following command on the OHP host to recover and restart the snapshot
volume:
# vxrecover -g snapvoldg -m snapvol
8 On the OHP host, use the following commands to check and locally mount
the snapshot volume:
# fsck -F vxfs /dev/vx/rdsk/diskgroup/volume
# mount -F vxfs /dev/vx/dsk/diskgroup/volume mount_point
For example, to check and mount the volume scfs_vol in the disk group
exampledg for shared access on the mount point, /bak/mnt_pnt:
# fsck -F vxfs /dev/vx/rdsk/exampledg/scfs_vol
# mount -F vxfs /dev/vx/dsk/exampledg/scfs_vol /bak/mnt_pnt
9 Back up the file system at this point using a command such as bpbackup in
Symantec NetBackup. After the backup is complete, use the following
command to unmount the file system.
# unmount mount_point
10 On the OHP host, use the following command to deport the snapshot
volume’s disk group:
# vxdg deport snapvoldg
11 On the master node, re-import the snapshot volume’s disk group as a shared
disk group using the following command:
# vxdg -s import snapvoldg
12 On the master node, use the following command to rejoin the snapshot
volume’s disk group with the original volume’s disk group:
# vxdg join snapvoldg volumedg
For example, to join disk group splitdg with exampledg:
# vxdg join splitdg exampledg
13 The snapshot volume is initially disabled following the join. Use the
following command on the primary host to recover and restart the snapshot
volume:
# vxrecover -g volumedg -m snapvol
14 When the backup is complete, use the following command to unmount the
snapshot volume, and make it ready for its contents to be refreshed from the
primary volume:
# umount mount_point
When synchronization is complete, the snapshot is ready to be re-used for
backup.
Caution: Before attempting to unmount the snapshot, shut down all
applications that access a file system in the snapshot volume, and also
unmount any such file system.