topic Re: Replacing boot disk!! in Operating System - HP-UX

Replacing boot disk!!

Amit Manna_6 — Fri, 01 Jul 2005 09:20:03 GMT

Hi
Can anybody please let me know the procedure for replacing boot disk in HP?

Re: Replacing boot disk!!

Pete Randall — Fri, 01 Jul 2005 09:23:59 GMT

Check this document:
http://docs.hp.com/en/5991-1236/When_Good_Disks_Go_Bad.pdf

Pete

Re: Replacing boot disk!!

RAC_1 — Fri, 01 Jul 2005 09:26:07 GMT

Do you have LVM cook book?? It has all details. Was it mirrored?? If disk is hot swapable, replace it and you need to do vgcfgrestore -n /dev/vg00 /dev/rdsk/cxtxdx, vgchange -a y vg00, mkboot and vgsync.

Check with lvlnboot.

Anil.

Re: Replacing boot disk!!

DCE — Fri, 01 Jul 2005 10:01:02 GMT

Assumming the drive is hot swappable:

Replace disk

vgcfgrestore â n /vg00 /dev/rdsk/c1t15d0
vgsync /dev/vg00
mkboot â b /dev/rdsk/c3t15d0 /dev/rdsk/c1t15d0
mkboot â a â hpux-lqâ /dev/rdsk/c1t15d0
lifcp /dev/rdsk/c1t15d0:AUTO â
lvlnboo

Re: Replacing boot disk!!

mostefai mourad_1 — Fri, 01 Jul 2005 11:53:23 GMT

Hi,
If you don't have mirror disk, and you have the ignite tape, so u have only to raplace ur hard disk and boot from tape and u follow the procedure.
I assume that u know ow to create the ignite tape:
# make_tape_recovery -a /dev/rmt/Xm -AvI
/dev/rmt/Xm is the tape device file.

bye.

Re: Replacing boot disk!!

KVK — Fri, 01 Jul 2005 20:10:15 GMT

Hello Amit,

If your problem resolved please spend some 2 sec to assign the points to who helps out for your problem .

You have assigned 44 of 278 which it looks not good

Re: Replacing boot disk!!

vinod_25 — Fri, 01 Jul 2005 22:04:39 GMT

hi amit

do you mean to say : how to replace a mirrored root disk? then

/dev/dsk/c1t2d0 is the disk u changed in a root mirrored vg... the steps are as follows..

1)boot in lvm maintenance mode
ISL> hpux -lm
2)do vgcfgrestore to restore LVM config data from config backup to Pv
# vgcfgrestore -n vg00 /dev/rdsk/c1t2d0
3)Activate the Vg
# vgchange -a y vg00
4)use mkboot to put boot utilities and Auto file in LIF area
# mkboot -l /dev/rdsk/c1t1d0
# mkboot -a "hpux" /dev/rdsk/c1t1d0
5)use lvlnboot
# lvlnboot -r /dev/vg00/lvol3 /dev/vg00
# lvlnboot -b /dev/vg00/lvol1 /dev/vg00
# lvlnboot -s /dev/vg00/lvol2 /dev/vg00
# lvlnboot -d /dev/vg00/lvol2 /dev/vg00
# lvlnboot -R
# lvlnboot -v
6) remirror using vgsync
# vgsync
7) Reboot the server in multiuser mode
8) check successful completion by
# lvdisplay -v /dev/vg00/lvolZ
# vgdisplay -v vg00

Regards

Vinod K

Re: Replacing boot disk!!

Devender Khatana — Sun, 03 Jul 2005 08:04:30 GMT

Hi,

If the disk was a mirrored root disk prior to going for replacing if the disk is still acessible ensure there are no stale extents & there are no partitions which lies only on this disk without mirror. Normally one can have unmirrored swap partitions if the demand for swap is more.

HTH,
Devender

Re: Replacing boot disk!!

PVR — Mon, 04 Jul 2005 09:35:04 GMT

Do you have the mirrored copy of boot disk ?

If yes, you can go ahead with steps suggestd by Vinod wih small change to make the server bootable even if it fails to meet the quorum requirement.

mkboot -a "hpux -lq" /dev/rdsk/c1t1d0.

If you don't have a mirror copy, better start the insallation from the ignite backup.

Re: Replacing boot disk!!

Sudeesh — Mon, 04 Jul 2005 22:28:34 GMT

You can use the following steps to replace a hot-swappable boot disk on PARISC.

1. Remove the failed disk from bay and insert the new disk.

2. ioscan -H : to claim the disk.

3. mv /etc/lvmtab /etc/lvmtab.old : to avoid pvcreate fail on the new disk.

4. pvcreate -B /dev/rdsk/c_t_d0 :
Create the physical volume on new disk

5. mv /etc/lvmtab.old /etc/lvmtab : Restore original lvmtab

6. vgcfgrestore -n vg00 /dev/rdsk/c_t_d0

7. vgchange -a y /dev/vg00

8. vgsync vg00 : only if automatic sync is not happening.

9. mkboot /dev/rdsk/c_t_d0

10. mkboot -a "hpux -lq" /dev/rdsk/c_t_d0

11. lvlnboot -Rv /dev/vg00

12. lvdisplay -v /dev/vg00/lvol* : Verify all the extends are current.

Hope this helps

Sudeesh