topic Re: Boot disk HW path in Operating System - HP-UX

Boot disk HW path

Prashant Zanwar_4 — Wed, 08 Sep 2004 13:37:45 GMT

Hi,
I have following :
# lvlnboot -v
Boot Definitions for Volume Group /dev/vg00:
Physical Volumes belonging in Root Volume Group:
/dev/dsk/c1t2d0 (0/0/1/1.2.0) -- Boot Disk
/dev/dsk/c2t2d0 (0/0/2/0.2.0) -- Boot Disk

Then also my ISEE report says I have boot disk on same HW path, i shud purchase new hardware to shift the alternate disk. isnt it something wrong report?
Thanks and rgdz
Prashant

Re: Boot disk HW path

Sundar_7 — Wed, 08 Sep 2004 13:48:59 GMT

Did you execute dd from c1t2d0 to c2t2d0 ?

# echo "0x2008?4D" | adb /dev/dsk/c1t2d0

# echo "0x2008?4D" | adb /dev/dsk/c2t2d0

Execute the above commands. If the output for the both the disks match, that implies
LVM headers on both the disks are same.

Re: Boot disk HW path

Prashant Zanwar_4 — Wed, 08 Sep 2004 13:56:41 GMT

Only one of the field is differing in this:
# echo "0x2008?4D" | adb /dev/dsk/c1t2d0
2008: 157971547 976681765 157971547 976681766

root@crdushp5:/.root

# echo "0x2008?4D" | adb /dev/dsk/c2t2d0
2008: 157971547 978017094 157971547 976681766

What is recommended next?
Thanks and regards
Prashant

Re: Boot disk HW path

Sundar_7 — Wed, 08 Sep 2004 13:59:26 GMT

I dont see any problem with this. PVID field should be different.

May be it is referring to the way your mirroring has been setup ? - It would be a good idea to check and confirm the allocation policy (PVG-strict) and if you have /etc/lvmpvg file.

Re: Boot disk HW path

Kent Ostby — Wed, 08 Sep 2004 14:00:41 GMT

Prashant --

Its possible that its complaining because both of them are off of the 0/0 card although I'm not sure.

Are we sure these are seperate disks or are they alternate links to the same disk ?

Best regards,

Kent M. Ostby

Re: Boot disk HW path

Sundar_7 — Wed, 08 Sep 2004 14:04:36 GMT

They cannot be alternate links to the same disk since the PVID is different. If both the device files refer to the same device then PVID will be same.