Veritas Volume Manager 4.1 Troubleshooting Guide (HP-UX 11i v3, February 2007)

Recovery from Failure of Instant Snapshot

Operations

This chapter describes how to recover from various failure and error conditions that may

occur during instant snapshot operations:

◆ Failure of vxsnap prepare

◆ Failure of vxsnap make for Full-Sized Instant Snapshots

◆ Failure of vxsnap make for Break-Off Instant Snapshots

◆ Failure of vxsnap make for Space-Optimized Instant Snapshots

◆ Failure of vxsnap restore

◆ Failure of vxsnap reattach or refresh

◆ Copy-on-write Failure

◆ I/O Errors During Resynchronization

◆ I/O Failure on a DCO Volume

See the VERITAS Volume Manager Administrator’s Guide and the vxsnap(1M) manual page

for full details of the creation and administration of instant snapshots.

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.