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

33Recovery from failure of instant snapshot operations

I/O errors during resynchronization

Snapshot resynchronization (started by vxsnap syncstart, or by specifying

sync=on to vxsnap) stops if an I/O error occurs, and displays the following

message on the system console:

VxVM vxsnap ERROR V-5-1-6840 Synchronization of the

volume

stopped due to I/O error

After correcting the source of the error, use the following command to restart

the resynchronization operation:

# vxsnap [-b] [-g

diskgroup

] syncstart

volume

See the Veritas Volume Manager Administrator’s Guide and the vxsnap(1M)

manual page for full details of how to use the

vxsnap syncstart command.

I/O failure on a DCO volume

If an I/O failure occurs on a DCO volume, its FastResync maps and DRL log

cannot be accessed, and the DCO volume is marked with the BADLOG flag. DRL

logging and recovery, and instant snapshot operations are not possible with the

volume until you recover its DCO volume using the procedure described in

“Recovering a version 20 DCO” on page 28.

Note: If the I/O failure also affects the data volume, it must be recovered before

its DCO volume can be recovered.