Veritas Volume Manager 5.0 Troubleshooting Guide Guide (September 2006)

Chapter
2
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.