Veritas Volume Manager 5.0 Troubleshooting Guide, HP-UX 11i v3, First Edition, May 2008

30 Recovery from failure of instant snapshot operations

Failure of vxsnap prepare

If a vxsnap prepare operation fails prematurely, the vxprint command may

show the new DCO volume in the INSTSNAPTMP state. VxVM can usually

recover the DCO volume without intervention. However, in certain situations,

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

delete the DCO volume:

# vxedit [-g

diskgroup

] rm

DCO_volume

Alternatively, the DCO volume is removed automatically when the system is

next restarted. When the DCO volume has been removed, run the

vxsnap

prepare command again.

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:

1 Use 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