topic Re: Replacing the root mirror disk in Operating System - HP-UX

Replacing the root mirror disk

Rg_4 — Sat, 11 Sep 2010 09:14:37 GMT

Hi all,

Is it possible to replace root mirrored disk uisng the below mentioned procedure. Pls guide me if there is any mistake.

1. pvchange -a n
2. vgcfgrestore
3. pvchange -a y
4. mkboot
5. lvlnboot -R

Thanks in adv,
Ragesh

Re: Replacing the root mirror disk

Matti_Kurkela — Sat, 11 Sep 2010 09:50:16 GMT

At first glance, it seems it's maybe OK for PA-RISC systems, but not for Itanium.

With Itanium systems, you'll need to re-create the disk partitions (slices), restore the EFI bootloader to s1, then apply your procedure to s2.

The standard procedures are documented in the "When Good Disks Go Bad" whitepaper:

http://docs.hp.com/en/5991-1236/When_Good_Disks_Go_Bad_WP.pdf

See Appendix D for detailed root mirror replacement procedures, for both Itanium and PA-RISC servers.

MK

Re: Replacing the root mirror disk

Rg_4 — Sat, 11 Sep 2010 12:31:20 GMT

Hi MK,

After failed disk has been replaced, is pvcreate is required to run on it ?

Ragesh

Re: Replacing the root mirror disk

Patrick Wallek — Sat, 11 Sep 2010 13:11:56 GMT

>>After failed disk has been replaced, is pvcreate is required to run on it ?

No, vgcfgrestore takes care of that.

Re: Replacing the root mirror disk

vishnu.khandare — Mon, 13 Sep 2010 06:28:50 GMT

Do this..

1.pvchange -a N /dev/disk/diskXX_p2
2.pvchange -a N /dev/disk/diskXX
Replace the disk
3.scsimgr replace_wwid â D /dev/rdisk/diskXX
4.ioscan â m lun
5.io_redirect_dsf -d /dev/disk/diskXX -n /dev/disk/diskXX
here aftre -n give new path where it changed to
6.ioscan â m lun /dev/disk/diskXX
7.vgcfgrestore -n /dev/vg00 /dev/rdisk/diskXX_p2

This will restore the vg00 and u will get mirrored root disk, it take time to sync

Re: Replacing the root mirror disk

Hakki Aydin Ucar — Mon, 13 Sep 2010 07:03:31 GMT

http://forums11.itrc.hp.com/service/forums/questionanswer.do?threadId=1391936

http://forums11.itrc.hp.com/service/forums/questionanswer.do?threadId=1425531

Re: Replacing the root mirror disk

haux — Thu, 23 Dec 2010 15:29:39 GMT

hello,

here you find how to remplace your root mirrored disk for Itanium CPU, I have used IT several times and it works perfectly

http://www.r71.nl/kb/technical/231-hpux-itanium-replace-mirrored-boot-disk

just be informed that its not the same for the PARISC CPU

Regards.