Veritas Volume Manager 5.0.1 Troubleshooting Guide, HP-UX 11i v3, First Edition, November 2009

replacing the failed disk. Any volumes that are listed as Unstartable must be

restarted using the vxvol command before restoring their contents from a backup.

To forcibly restart a disabled volume

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Type the following command:

# vxvol [-g diskgroup] -o bg -f start volume

The -f option forcibly restarts the volume, and the -o bg option

resynchronizes its plexes as a background task. For example, to restart the

volume myvol so that it can be restored from backup, use the following

command:

# vxvol -g mydg -o bg -f start myvol

Clearing the failing flag on a disk

If I/O errors are intermittent rather than persistent, Veritas Volume Manager

sets the failing flag on a disk, rather than detaching the disk. Such errors can

occur due to the temporary removal of a cable, controller faults, a partially faulty

LUN in a disk array, or a disk with a few bad sectors or tracks.

If the hardware fault is not with the disk itself (for example, it is caused by

problems with the controller or the cable path to the disk), you can use the vxedit

command to unset the failing flag after correcting the source of the I/O error.

Warning: Do not unset the failing flag if the reason for the I/O errors is unknown.

If the disk hardware truly is failing, and the flag is cleared, there is a risk of data

loss.

Recovering from hardware failure

Clearing the failing flag on a disk