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

Chapter 2, Recovery 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 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 22.

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

volume can be recovered.