Recover mirrored disks when installing HP-UX11i

[David Junyent]

I have a HP-UX10.20 server with some pairs of mirrored disks.
I'm going to do a cold install of HP-UX11i.
What is the correct procedure to be able of recover my mirrored lvols once the installation is done?
I'm not sure if I have to vgcfgbackup&vgcfgrestore or vgexport&vgimport. Can somebody recall me the proper steps ?

[Mark Grant]

If these disks are in there own volume group that aren't going to be touched by the new installation, you can just "vgexport -m mapfile -s vgwhatever" and then after the install, create /dev/vgwhatever/group and then "vgimport -m mapfile -s vgwahetever".

Of course, that map file is going to have to be copied somewhere off the machine before you do the install and then copied back afterwards.

[Pete Randall · Accepted solution]

Mark's got it, but you don't want to forget the mknod command. The steps:

vgexport -p -s -m /tmp/vgNNmap /dev/vgNN
(save the maps to tape or somewhere you can recover them)
mkdir /dev/vgNN
mknod /dev/vgNN/group c 64 0xNN0000
vgimport -s -m /tmp/vgNNmap /dev/vgNN
vgchange -a y /tmp/vgNN

That should do it.


Pete

[David Junyent]

Hi,

Thanks a lot for you quick answer !

I also found am HP document...

http://www4.itrc.hp.com/service/iv/docDisplay.do?admit=-938907319+1068203461341+28353475&docId=%2FDE_SW_UX_swrec_EN_01_E%2FLVM.pdf

where all this issues related to LVM and MirrorDisk are very well explained.

Regards,

David