Bad disk-- how to add a different disk into vol group

[SSO Montgomery]

Had a bad disk that was a memober of a vol group. Want to remove the bad disk and add another disk to the volume group instead.
What are the steps to do this please.

[Sajid_1 · Accepted solution]

hello,

hopes the VG is not activated now. Check it with:
# vgdisplay -v /dev/vg_name
If the disk is hot-swappable, then remove the disk and install the new one. If not, then you need to shutdown the server to replace the disk. Once replaced, then:
# ioscan -fnC disk (check the new disk is identified)
# pvcreate /dev/rdsk/cxtydz
# vgcfgrestore /dev/vg_name /dev/rdsk/cxtydz

This will restore the VG information to the new disk.
# vgchange -a y /dev/vg_name ( this will activate the VG back)
Then findout the LVs which was configured on the old disk using:
# pvdisplay -v pv_path
# newfs -F fs_type lv_name
Now mount all FS using - mount -a and restore the data.

gl

[harry d brown jr]

(1) do you have the volume group backed up on tape or elsewhere? What LV's were lost? Did you have striping or mirroring enabled?

(2) add the disk using the same SCSI ID as the old bad one (makes life easier).



live free or die
harry

[Sajid_1]

This document is a good learning point of replacing disks Doc ID -KBAN00000347:
http://support2.itrc.hp.com/service/cki/docDisplay.do?docLocale=en_US&docId=200000058036738

[SSO Montgomery]

There is a new problem that just arose with the previous question. Get ready here we go. The disk was EMC attached to HP. We checked to see if SAM had the latest patches to talk with EMC, or does that matter?

[harry d brown jr]

SSO,

The disk was on an EMC symmetrix? Are you saying you LOST data because a Symmetrix failed?

live free or die
harry

[Michael Tully]

Typically as part of EMC's service your unit should have dialled home and an engineer call your contact point and told you, you had a dead disk. Depending on how your disk array is laid out, as to whether any data will be lost. (not likely) Within the unit itself (even RAID5) should have used a hot spare disk.
An EMC engineer should replace the dead disk and the unit should automatically re-sync.

[harry d brown jr]

Though loss of data could occur within a symmetrix, but unlikely as Michael has pointed out.

live free or die
harry