topic Moving root disk in Operating System - HP-UX

Moving root disk

Telefonica OSI — Fri, 26 Dec 2008 23:35:58 GMT

Hi,
We followed the procedure defined on "When Good Disks Go Bad: Dealing with Disk Failures Under LVM, Appendix F: Moving a Root Disk to a New Disk or Another Disk" on an Itanium rx6600 11.23. We slightly modified the commands used to fit Integrity Servers requirements (mkboot -e -l, etc.). But, once we got to point 6: shutdown and reboot... the machine would not boot any more. It was not even able to boot from a recovery shell (?).
We have made tests on a similar machine with the same results.
We have managed to complete the whole procedure if we do the lvlnboot's BEFORE shutting down.
So, we have two questions:
1. Anybody has done anything similar with good results? (Ignite, Mirror or DRD do not apply to our specific case)
2. Anybody has followed the procedure described in WGTGB for PA-RISC? (WBTGB has been great for us in many occasions, but we don't have a pa-risc machine handy).
In both cases, we would appreciate if anybody could shed us some light on why you have to lvlnboot before / after the reboot. We are really puzzled about it.
Thank you, folks.

Re: Moving root disk

sujit kumar singh — Sun, 28 Dec 2008 09:23:15 GMT

hello

Please can u elaborate what modifications u did as the platform is INtegrity???

u have to pproperly create the EFI, HPUX and the HPSP partition on the newdisk.

Step3#vgextend /dev/vg00 /dev/dsk/c2t2d2s2
step4# pvmove /dev/dsk/c1t1d1s2 /dev/dsk/c2t2d2s2
step5#vgreduce /dev/vg00 /dev/dsk/c1t1d1s2

The steps that u havemodified do this conform to the above modifications in the steeps as i have given?

please do not forget to assign the points.

Sujit

as far as PV move is concerned i think u need to do that for the /dev/dsk/

Re: Moving root disk

Jannik — Sun, 28 Dec 2008 19:43:30 GMT

As Sujit says you have to use idisk to partitioning the system disk.

# vi /tmp/idf
3
EFI 500MB
HPUX 100%
HPSP 400MB

# idisk -f /tmp/idf -w /dev/rdisk/disk2
# insf -eC disk
# pvcreate -B /dev/rdisk/disk2_p2
# vgextend vg00 /dev/disk/disk2_p2
# mkboot -e -l /dev/rdisk/disk2
# mkboot -a "hpux" /dev/rdisk/disk2

The logical volumes on the mirror boot disk must be extended in the same order that they are configured on the original boot disk. Determine the list of logical volumes in the root volume group and their order. For example:

# pvdisplay -v /dev/disk/disk0_p2 | grep 'current.*0000 $'
00000 current /dev/vg00/lvol1 00000
00010 current /dev/vg00/lvol2 00000
00138 current /dev/vg00/lvol3 00000
00151 current /dev/vg00/lvol4 00000
00158 current /dev/vg00/lvol5 00000
00159 current /dev/vg00/lvol6 00000
00271 current /dev/vg00/lvol7 00000
00408 current /dev/vg00/lvol8 00000

# for i in $(pvdisplay -v /dev/disk/disk0_p2 | grep 'current.*0000 $' | awk '{print $3}')
do
lvextend -s â m 1 $i /dev/disk/disk2_p2
done
# lvsync -T /dev/vg00/lvol*

This is to update the root volume group information:
# lvlnboot -R /dev/vg00

Use the setboot command to change the primary disk to the new disk now you could use the manual that U mentioned.

and you have to update the /stand/bootconf file to this if that is the disk you use:
# vi /stand/bootconf
l /dev/disk/disk2_p2