LSM brake for failing disk

[Shehan]

Hi Team

I have two node tru64 cluster with LSM configured BA356 external storage.The Problem, one disk is being failing in one mirror set. Hence I want to replace the failing disk now. Worry is as LSM is configured we will have to brake the LSM before replacing it. As I have very week knowledge, I am afraid to do this without help. Hence please help me to brake the LSM and build the LSM once the disk is replaced.

Regards
Nirukshitha

[Pieter 't Hart · Accepted solution]

afaik you don't have to break the LSM config.

if this disk is also used for the system disk it may need some extra attention.

it is allways a good idea to make a backup before making changes.

what version TRU64/cluster you use?
do you use the command-line interface or the graphical interface for managing LSM?
is the disk used only in a single volume or multiple volumes?

[Shehan]

Dear Hart

We are using CLI for configuring LSM.I believe this disk is used for single volume.Anyway I have attached some volprint output here with. Its failing disk is dsk13 is being mirrored with dsk7.

Regards
Nirukshitha

[Pieter 't Hart]

using "voldiskadm" you can use option-5 to
replace a disk or option-12 to mark a new disk as a spare, wich can automatically replace the failed disk.

if using tru64 V5.x
- replace the failed disk
- hwmgr -scan scsi (disk gets new id)
- voldiskadm to assign new disk as spare

if using tru64 V4.x
- replace the failed disk (disk keeps old id)
- voldiskadm to reassociate the disk with the diskgroup

[Kapil Jha]

Read my reply in
http://forums13.itrc.hp.com/service/forums/questionanswer.do?threadId=1332231

Same procedure you have to follow.
And its very simple not complecated well even if u have to break the mirror its OK no big deal in it.

BR
Kapil+