VERITAS Volume Manager 3.5 Troubleshooting Guide (September 2004)

Recovery from Boot Disk Failure

Recovery by Reinstallation

Chapter 2

- RW

sd disk01-04 v03-02

disk03 262144

30720 0

c1t5d6 DIS

This volume has two plexes, v03-01 and v03-02. The ﬁrst plex (v03-01) does not use

any space on the invalid disk, so it can still be used. The second plex (v03-02) uses space

on invalid disk disk01 and has a state of NODEVICE. Plex v03-02 must be removed.

However, the volume still has one valid plex containing valid data. If the volume needs to

be mirrored, another plex can be added later. Note the name of the volume to create

another plex later.

To remove an invalid plex, use the vxplex command to dissociate and then remove the

plex from the volume. For example, to dissociate and remove the plex v03-02, use the

following command:

# vxplex -o rm dis v03-02

Step 7. Once all the volumes have been cleaned up, clean up the disk conﬁguration as described

in the following section, “Clean up Disk Conﬁguration” on page 44

Clean up Disk Conﬁguration Once all invalid volumes and plexes have been

removed, the disk conﬁguration can be cleaned up. Each disk that was removed,

reinstalled, or replaced (as determined from the output of the vxdisk list command)

must be removed from the conﬁguration.

To remove the disk, use the vxdg command. To remove the failed disk disk01, use the

following command:

# vxdg rmdisk disk01

If the vxdg command returns an error message, some invalid mirrors exist. Repeat the

processes described in “Clean up Volumes” on page 40 until all invalid volumes and

mirrors are removed.

Final Volume Reconﬁguration Once the root disk is under VxVM control, any other

disks that were replaced should be added using the vxdiskadm command.

Once all the disks have been added to the system, any volumes that were completely

removed as part of the conﬁguration cleanup can be recreated and their contents

restored from backup. The volume recreation can be done by using the vxassist

command or the graphical user interface.

For example, to recreate the volumes v01 and v02, use the following command:

# vxassist make v01 24000

# vxassist make v02 30720 layout=stripe nstripe=3

Once the volumes are created, they can be restored from backup using normal

backup/restore procedures.

Recreate any plexes for volumes that had plexes removed as part of the volume cleanup.

To replace the plex removed from volume v03, use the following command:

# vxassist mirror v03

Once you have restored the volumes and plexes lost during reinstallation, recovery is

complete and your system is conﬁgured as it was prior to the failure.