topic Re: Root disk change in Operating System - HP-UX

Root disk change

Irek_1 — Tue, 20 Jan 2004 16:09:19 GMT

Hi,
i have just replaced root disk using make_tape_recovery -x inc_entire=vg00. It worked, but i have other disk with volume group vg01. This volume group doesn't exist in new system. How to fix it?

Re: Root disk change

Chris Watkins_1 — Tue, 20 Jan 2004 16:16:41 GMT

First, make sure it really isn't there:
# vgchange -a y vg01
If that fails, see if /dev/vg01 exists.
If not, do:

mkdir /dev/vg01
mknod /dev/vg01/group c 64 0x010000

At this point, see if you have a vg01 mapfile in /etc/lvmconf.
If so, do:

vgimport -m /etc/lvmconf/vg01.mapfile vg01

If you have no mapfile, perform a vgscan.
It will alert you to the disk or disks that are part of a
voume group that doesn't exist right now.
In that case, try:

vgimport vg01 /dev/dsk/cXtXdX /dev/dsk/cXtXdX ...etc...
substituting the correct orphaned disks shown in the vgscan.

Then do:

vgchange -a y vg01
mount -a
(Or, if the entries aren't in the /etc/fstab, add them)

Re: Root disk change

Sridhar Bhaskarla — Tue, 20 Jan 2004 16:19:31 GMT

Hi,

If you had the cables connected to the system then it should have imported even vg01.

If there is only one disk, it's not difficult to import vg01. Since you restored the same OS, you may have good mapfiles under /etc/lvmconf directory. Look for /etc/lvmconf/vg01.mapfile If you have it then do

#mkdir /dev/vg01
#mknod /dev/vg01/group c 64 0x010000
#vgimport -v -m /etc/lvmconf/vg01.mapfile /dev/vg01 /dev/dsk/cxtydz
#vgchange -a y vg01
#mount -a

If you don't have the mapfile, then use

#vgimport -v vg01 /dev/dsk/cxtydz

It will create logical volumes with the default names in /dev/vg01 directory. Do a 'vgchange -a y vg01' and mount each logical volume to see which filesystem it belongs to.

-Sri

Re: Root disk change

Irek_1 — Tue, 20 Jan 2004 16:57:25 GMT

It worked! Thanx for all!
Irek