Veritas Volume Manager 5.0 Troubleshooting Guide Guide (September 2006)

32 Recovery from failure of instant snapshot operations

Failure of vxsnap make for full-sized instant snapshots

If a vxsnap make operation fails during the creation of a full-sized instant snapshot, the

snapshot volume may go into the DISABLED state, be marked invalid and be rendered

unstartable. You can use the following command to check that the inst_invalid flag

is set to on:

# vxprint [-g diskgroup] -F%inst_invalid snapshot_volume

VxVM can usually recover the snapshot volume without intervention. However, in certain

situations, this recovery may not succeed. If this happens, use the following steps to delete

the DCO volume:

1Use the

vxmend command to clear the snapshot volume’s tutil0 field:

# vxmend [-g diskgroup] clear tutil0 snapshot_volume

2 Run the following command on the snapshot volume:

# vxsnap [-g diskgroup] unprepare snapshot_volume

3 Prepare the snapshot volume again for snapshot operations:

# vxsnap [-g diskgroup] prepare snapshot_volume

Failure of vxsnap make for break-off instant snapshots

If a vxsnap make operation fails during the creation of a third-mirror break-off instant

snapshot, the snapshot volume may go into the INSTSNAPTMP state. VxVM can usually

recover the snapshot volume without intervention. However, in certain situations, this

recovery may not succeed. If this happens, use the following command to delete the

snapshot volume:

# vxedit [-g diskgroup] rm snapshot_volume

Alternatively, the snapshot volume is removed automatically when the system is next

restarted.

Failure of vxsnap make for space-optimized instant

snapshots