topic Replace Disk (PV/VG/LV) in Operating System - HP-UX

Replace Disk (PV/VG/LV)

Laurent Paumier — Wed, 22 Feb 2006 05:05:26 GMT

Hello,
I must replace a disk on a HP-UX Name B.11.00 U 9000/800.
The disk is the c7t1d0.
It's a member of the PVGroup PVG1B. This PVG1B is member of the unique VG VG01.
Some logical volumes are stale. (Volumes integrating c7t1d0). LVOL stale have a mirror copie.

After having replaced the disk, which are the operations to be made ? pvXXX, vgXXX, lvXXX ?

Thank you very much.

# vgdisplay -v
--- Volume groups ---
VG Name /dev/vg01
...
Total PVG 4
Total Spare PVs 0
Total Spare PVs in use 0

--- Logical volumes ---
LV Name /dev/vg01/lvol1
LV Status available/syncd
...
Used PV 2

LV Name /dev/vg01/lvol2
LV Status available/stale
...
Used PV 20

LV Name /dev/vg01/lvol3
LV Status available/stale
...
Used PV 20

--- Physical volume groups ---
PVG Name PVG1
...
PVG Name PVG1b
PV Name /dev/dsk/c7t0d0
PV Name /dev/dsk/c7t1d0
PV Name /dev/dsk/c7t2d0
PV Name /dev/dsk/c7t3d0
PV Name /dev/dsk/c7t4d0
PV Name /dev/dsk/c7t5d0
PV Name /dev/dsk/c7t6d0
PV Name /dev/dsk/c7t7d0
PV Name /dev/dsk/c7t8d0
PV Name /dev/dsk/c7t9d0

# lvdisplay /dev/vg01/lvol2
--- Logical volumes ---
LV Name /dev/vg01/lvol2
VG Name /dev/vg01
.
LV Status available/stale
Mirror copies 1
Consistency Recovery MWC
Schedule parallel
...
Stripes 0
Stripe Size (Kbytes) 0
Bad block on
Allocation PVG-strict/distributed

Re: Replace Disk (PV/VG/LV)

Devender Khatana — Wed, 22 Feb 2006 05:13:11 GMT

Hi,

Replace the disk and add another disk at the same ID/controller so that the device file is same and obviously the disk size also should be same only.

#vgcfgrestore -n /dev/vg01 /dev/rdsk/c7t1d0
#vgsync vg01

This should be able to do this.

Also have a lokk at this disk-replacement guide
http://docs.hp.com/en/5991-1236/When_Good_Disks_Go_Bad.pdf

HTH,
Devender

Re: Replace Disk (PV/VG/LV)

Arunvijai_4 — Wed, 22 Feb 2006 05:19:25 GMT

Hello,

Check these threads for more information..

http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=763059
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=124025

-Arun

Re: Replace Disk (PV/VG/LV)

Laurent Paumier — Wed, 22 Feb 2006 05:19:28 GMT

Thanks for the answer and the pdf. ;)

Re: Replace Disk (PV/VG/LV)

Senthil Kumar .A_1 — Wed, 22 Feb 2006 05:22:50 GMT

Hi,

Devender reply is spot on.

Just a point adder, in case you have added the disk to different scsi controller or its target ID was different, and the system recognizes it as a differnt device file(say c8t2d0), just do the following

vgcfgrestore -n /dev/vg01 -o /dev/rdsk/c7t1d0 /dev/rdsk/c8t2d0

Then syncronize the mirror,

vgsync vg01

The document which devender linked in the previous response, is indeed best, that could help you in such situations.

Regards,
Senthil Kumar .A

Re: Replace Disk (PV/VG/LV)

Ajitkumar Rane — Wed, 22 Feb 2006 06:31:46 GMT

Laurent,

As already suggested in the previous reply to do a vgcfgrestore, just an addon to it.

Preferably, the volume group should be made unavailable before executing vgcfgrestore by executing the command

vgchange -a n vg01

OR

Force to restore the LVM configuration data when volume group is still active
vgcfgrestore -R -n /dev/vg01 /dev/rdsk/c7t1d0

Rgds,

Ajit