topic Re: Vg00 Disk Failed in Operating System - HP-UX

Vg00 Disk Failed

MRSG — Thu, 29 Dec 2005 06:53:38 GMT

Dear All,

One of our disk inside vg00 has failed, the volume group is not mirrored, what is the best strategy for replacing the disk?
Currently any LVM commands on vg00 hangs the system...

Re: Vg00 Disk Failed

Pete Randall — Thu, 29 Dec 2005 06:57:56 GMT

I would suggest following the steps outlined in this document:

http://docs.hp.com/en/5991-1236/When_Good_Disks_Go_Bad.pdf

Pete

Re: Vg00 Disk Failed

Torsten. — Thu, 29 Dec 2005 06:57:57 GMT

recommended action:
replace the drive and restore your ignite backup.

HTH!

Re: Vg00 Disk Failed

Luk Vandenbussche — Thu, 29 Dec 2005 07:06:19 GMT

Hi,

I hope you have an ignite tape.

Replace the disk an restore the OS from the ignite tape.

Re: Vg00 Disk Failed

Peter Godron — Thu, 29 Dec 2005 07:06:29 GMT

Hi,
depends on what was on the faulty drive !
If it was critical system files the system would have probably chrashed by now. The best way forward would be:
1. Identify corrupted disk
2. Confirm corruption, might only be lvmtab
Then depending on whether you have a backup:
3. Replace disk and restore
or
3. You may have to rebuild.
Lesson: Always take backups or pay for mirrors.

Re: Vg00 Disk Failed

Sivakumar TS — Thu, 29 Dec 2005 07:53:37 GMT

Hi,

1.identifi the failed disk.
2.replace it with a good one.
3.do a #vfcfgrestore on the disk.
4.recreate the filesystem which was present in the failed disk
5.restore the backup

With Regards,

Siva.

Re: Vg00 Disk Failed

Hoang Chi Cong_1 — Thu, 29 Dec 2005 21:11:35 GMT

Do you have any ignite backup?
You have only one way to recover from backup tape.
Replace the bad one.
Boot from backup tape and recover!

I think mirror is very usefull for this case!VG00 should be mirror for safe.

Goodluck!
Hoang Chi Cong

Re: Vg00 Disk Failed

Rashid Hamid — Thu, 12 Jan 2006 02:28:46 GMT

If you does not have mirror disk, the best way is to restore using ignite-ux

Re: Vg00 Disk Failed

Devender Khatana — Thu, 12 Jan 2006 02:42:39 GMT

Hi,

As you mentioned one of the vg00 disk failed, you should find out what are the LVOLs spread onto this disk. If these invlolves some of essentional file systems then it would be requiring a ignite recovery. But if there is some unused LVOLs across this disk then just replacing and restoring only those file systems shall be enough and complete recovery shall not be required.

Find out the disk usage by

#pvdisplay -v /dev/dsk/cxtydz

(Where /dev/dsk/cxtydz is the disk device file)

Also post output of

#bdf
&
#vgdisplay -v /dev/vg00

HTH,
Devender

Re: Vg00 Disk Failed

Devender Khatana — Thu, 12 Jan 2006 02:46:00 GMT

Hi,

Apart from this it also depends on what type of failure it is. Sometimes disk do not fail completely and start getting slow or giving random I/O error if this is the case you can still copy data and avoid ignite restoration.

In my opinion the ignite recovery shall be the last option as by doing so you will require to restore all LVOLs in vg00.

HTH,
Devender