topic Re: raid 01 boot problems in Operating System - HP-UX

raid 01 boot problems

peter demus — Thu, 27 Jun 2002 12:10:12 GMT

hello !

i've mirrored the root disk of 18 GB to another one succesfully. so i can pull out the first or second drive, get an email of the event monitor, can work. after push back the HDD, syncing is running fine. so RAID 1 is working.

i can boot from the first drive "primary boot path", i can also boot from the second drive "alternative boot path. using SEA and BO.

my problem. if i pull out the first or the second HDD, i can't boot and use HPUX. its producing a system panic after displaying:
boot vmunix....
alloc_pdc_pages

see attachment.

is it normal ? so i can't boot if i have one broken HDD ?

or it's a problem with setting up RAID 1 for the root boot disk ? i used the LVM cookbook. i can boot from both HDDs if the other is in the system.

or it's a problem with hpux 11i dec2001 ? so i missed some important settings not covered in my LVM cookbook ?

system: rp5430 v11.11

thanks pete

Re: raid 01 boot problems

Pete Randall — Thu, 27 Jun 2002 12:13:42 GMT

Sounds like quorums. Did you turn off quorums on your boot disks?

Pete

Re: raid 01 boot problems

Pete Randall — Thu, 27 Jun 2002 12:14:53 GMT

I'll take that back - doesn't sound like quorums. Hmmmmmm.

Pete

Re: raid 01 boot problems

Arockia Jegan — Thu, 27 Jun 2002 12:21:52 GMT

It's because of quorum issue..

Have a look at the following link,

http://forums.itrc.hp.com/cm/QuestionAnswer/1,,0xca717d4cf554d611abdb0090277a778c,00.html

Re: raid 01 boot problems

peter demus — Thu, 27 Jun 2002 12:34:26 GMT

YES - quorum should it be

i used the command

mkboot -a "hpux (;0)/stand/peter"

and i missed the parameter -lq to deactivate quorum

so without second disk 50% of quorum is not there and system can't find vg00.

problem is that there is a system panic and no message cant activate vg00.....

i test it later

thanks peter

Re: raid 01 boot problems

Pete Randall — Thu, 27 Jun 2002 12:37:09 GMT

Pardon my confusion - I didn't think lack of quorum would cause a panic.

Pete

Re: raid 01 boot problems

George Abraham_1 — Thu, 27 Jun 2002 12:46:12 GMT

hai

Can you start in single user mode after removing the disk?..

make sure you have the Lastest hardware extension patches...

keep smiling
george

Re: raid 01 boot problems

Stefan Saliba — Thu, 27 Jun 2002 13:08:23 GMT

try this ,

Go to BCH

boot from the disk which is still in the slot

When it says interact with IPL say YES

when in the ISL prompt type

hpux -lq

this will ignore quorum and boot. You defintly have a quorum problem.

To avoid this you can change the auto file on your boot disk using the mkboot -a command doing something like mkboot -a "hpux -lq" /dev/rdsk/cXtXdX.

this will automaticlly ignore quorum next time you boot

Good luck

Stefan