VERITAS Volume Manager 3.5 Administrator's Guide (September 2004)

Configuring Off-Host Processing
Implementing Off-Host Processing Solutions
Chapter 11 379
# vxvol -g snapvoldg start snapvol
Step 11. On the OHP host, back up the snapshot volume. If you need to remount
the file system in the volume to back it up, first run fsck on the volume.
The following are sample commands for checking and mounting a file
system:
# fsck -F vxfs /dev/vx/rdsk/snapvoldg/snapvol
# mount -F vxfs /dev/vx/dsk/snapvoldg/snapvol mount_point
Back up the file system at this point, and then use the following
command to unmount it.
# umount mount_point
Step 12. On the OHP host, use the following command to deport the snapshot
volume’s disk group:
# vxdg deport snapvoldg
Step 13. On the primary host, re-import the snapshot volume’s disk group using
the following command:
# vxdg import snapvoldg
Step 14. On the primary host, use the following command to rejoin the snapshot
volume’s disk group with the original volume’s disk group:
# vxdg join snapvoldg volumedg
Step 15. The snapshot volume is initially disabled following the join. Use the
following commands on the primary host to recover and restart the
snapshot volume:
# vxrecover -g volumedg -m snapvol
# vxvol -g volumedg start snapvol
Step 16. On the primary host, reattach the plexes of the snapshot volume to the
original volume, and resynchronize their contents using the following
command:
# vxassist -g volumedg -o allplexes snapback snapvol
Repeat steps 4 through 16 each time that you need to back up the
volume.