Replace Primary root disk in HPUX 11i

[V.Manoharan]

Hi Experts,
I have an N4000 server with 2 internal disk configured as root VG. I want to remove the primary root disk. Could you please share me the procedure and what all precation I need to take care. Since it is a production server I just want to get double confirmed.

Regards
Mano.

[Pete Randall]

Here is a very handy reference that covers this and many other disk replacement situations:

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


Pete

[V.Manoharan]

Thanks for the immediate response. I have got the doc. I want to know whether I need to take the server reboot to boot from alt disk or will I be able to do the activity online. I am worried since it is the primary rrot disk.

[Geoff Wild · Accepted solution]

As long as everything is mirrored (including swap) then you can do this online.

Question really is - why do you want to remove the root disk?

Rgds...Geoff

[V.Manoharan]

Actually The primary root disk works normal but it gives scsi lbolt errors intermittendly and also the i/o performance is very slow. So I would like to replace the disk.

My requirement is server should not reboot if I reduce the lvols and reduce the primary root pv from root VG.

[Geoff Wild]

Well, you can try this:

After failed disk has been replaced by HP (assuming the disk is c1t5d0):

vgcfgrestore -n /dev/vg00 /dev/rdsk/c1t5d0

mkboot /dev/rdsk/c1t5d0

mkboot -a "hpux -lq (;0) /stand/vmunix" /dev/rdsk/c1t5d0

vgchange -a y /dev/vg00

lvlnboot -Rv /dev/vg00

vgsync /dev/vg00

But, seeing how it hasn't completely failed, you may want to reduce it from lvm, then from the vg....then pull it, then recreate your mirror.



Rgds...Geoff

[V.Manoharan]

I was in a doubt that the disk was hot pluggable not hotswappable.
Replaced the Disk online and resolved the issue.