topic Re: Root disk mirror in Operating System - HP-UX

Root disk mirror

Vikas_2 — Tue, 24 Jun 2003 07:29:30 GMT

Hi,
In my system vg00 has two diska and all the lv's are mirrored. Is there any other way apart from rebooting, to check if the system will be able to boot from another disk in case of failure. Because of business impact, it's not possible to shut the system and test the booting from another disk.

Thanks in advance.
Vikas

Re: Root disk mirror

Fragon — Tue, 24 Jun 2003 07:35:13 GMT

Hi, you can use:
#lvlnboot -v
to check if you can boot from the alternative disk.

Good luck!
-ux

Re: Root disk mirror

Massimo Bianchi — Tue, 24 Jun 2003 07:37:26 GMT

Hi,
things to check:

- lvlnboot -v

displays bootable devices

- lifcp /dev/dsk/:AUTO -

for each disks in vg00. display the startup string contained int the disks. must be equal

- lifls /dev/dsk/

for each disks in vg00. display the utility.
should be equal

- setboot
display the device configured for boot.
must point to the HW path of the disks in vg00

HTH,
Massimo

Re: Root disk mirror

Enrico P. — Tue, 24 Jun 2003 07:42:02 GMT

Hi,
no thereisn' t another way.
Check if the command lvlnboot -v is similar that:
Physical Volumes belonging in Root Volume Group:
/dev/dsk/c9t0d0 (3/0/4/0/0.0.0) -- Boot Disk
/dev/dsk/c9t1d0 (3/0/4/0/0.1.0)
/dev/dsk/c20t0d0 (3/0/12/0/0.0.0) -- Boot Disk
/dev/dsk/c20t1d0 (3/0/12/0/0.1.0)
and if the command

lifcp /dev/rdsk/cxtxdx:AUTO -
is
hpux -lq
if not:
mkboot -a "hpux -lq" /dev/rdsk/cxtxdx for every boot disk

Re: Root disk mirror

Yair Goldel — Tue, 24 Jun 2003 07:44:44 GMT

You can see beloow the output for 2 disk that have mirror between them.

%lvlnboot -v
Boot Definitions for Volume Group /dev/vg00:
Physical Volumes belonging in Root Volume Group:
/dev/dsk/c0t6d0 (0/0/0/2/0.6.0) -- Boot Disk
/dev/dsk/c4t6d0 (1/0/0/2/0.6.0) -- Boot Disk
Boot: lvol1 on: /dev/dsk/c0t6d0
/dev/dsk/c4t6d0
Root: lvol3 on: /dev/dsk/c0t6d0
/dev/dsk/c4t6d0
Swap: lvol2 on: /dev/dsk/c0t6d0
/dev/dsk/c4t6d0
Dump: lvol2 on: /dev/dsk/c0t6d0, 0

Re: Root disk mirror

Zeev Schultz — Tue, 24 Jun 2003 07:47:21 GMT

I'd go also for lifls -C /dev/dsk/cXdYtZ to see
that all utilities needed for boot are copied to the LIF area of the disk (man lif,lifls).

Zeev