What is the best procedure for remplacing a disk under LVM ?

[Jej']

For remplacing a NON-Boot disk without LVM mirroring, a Non-Boot disk with LVM mirroring or a boot disk with LVM mirroring, what is the best procedure ?
Is there a probleme if I use "vgcfgrestore" ? I' ve checked before the /etc/lvmconf/ directory to see if the files vg**.conf were there.
Another way is to use "lvreduce", "vgreduce", "vgextend", "lvextend". What is the best procedure?
Thanks.

[S.K. Chan · Accepted solution]

Attached is the procedure ..

good luck

[Patrick Wallek]

My recommendaitons for replacing disks within LVM:

1) Non-Boot disk without mirroring:
vgcfgrestore -n vg_name /dev/rdsk/c?t?d?
Now restore your data. Since it wasn't mirrored, you have no data left.

2) Non-Boot disk with mirroring
vgcfgrestore -n vg_name /dev/rdsk/c?t?d?
vgsync -- This will resync your mirrors, no restore needed

3) Boot disk with mirroring
vgcfgrestore -n vg_name /dev/rdsk/c?t?d?
Use mkboot commands to make the disk bootable again
vgsync to resync the mirrors

4) Boot disk without mirroring
I hope you have an Ignite/UX backup handy. You're gonna need it.

Keep in mind when replacing disks that some may be hot swappable and some may not be. If they are not and the disk you are replacing is a boot disk, you may need to boot off the alternate boot disk, assuming they are mirrored.

[A. Clay Stephenson]

Hi:

The following is a thread posted to the forums that discussed this issue:
http://forums.itrc.hp.com/cm/QuestionAnswer/1,11866,0xa601670142b2d5118ff10090279cd0f9,00.html

I especially reccomend that you download the Document ID "KBAN00000347"; it fully discusses are the possible combinations and permutations.

Clay

[James R. Ferguson]

Hi:

The Technical Knowledge Base contains an excellent docuement detailing the appropriate procedures for a variety of circumstances. See document #KBAN00000347 (attached).

Regards!

...JRF...

[Craig Rants]

Attached are some processes I use. Seem to work for me.

Craig

[Craig Rants]

One more doc...

[Sanjay_6]

Hi Trahard,

Look at the threads below for more info on LVM disk replacement.

Replacing an unmirrored hot swap hard disk (non-root)
http://us-support.external.hp.com/cki/bin/doc.pl/sid=f587d0f20cf95e8f42/screen=ckiDisplayDocument?docId=200000054518791

Replacing a mirrored data disk
(no hot swap)
http://us-support.external.hp.com/cki/bin/doc.pl/sid=f587d0f20cf95e8f42/screen=ckiDisplayDocument?docId=200000054562996

Replace root disk with mirroring
http://us-support.external.hp.com/cki/bin/doc.pl/sid=f587d0f20cf95e8f42/screen=ckiDisplayDocument?docId=200000024603956

Replacing a mirrored root disk
(no hot swap)
http://us-support.external.hp.com/cki/bin/doc.pl/sid=cbe693c709bb4ddf64/screen=ckiDisplayDocument?docId=200000054531628

Hope this helps.

thanks

[dhanish]

Thanks to all you replies.I will try this.

thnks