vgchgid missed one disk

UNIX HP-UX
1

Hi,

Suppose I have 3 disks c0t0d0, c0t0d1, and c0t0d2 all with the *same* VGID.

I then run:
# vgchgid /dev/rdsk/c0t0d0 /dev/rdsk/c0t0d1
(notice I *accidentally* skipped the third disk!)

How would I fix this so that all 3 disks have the same VGID again?

I'm looking for step-by-step list of commands that would fix this...

Thanks.

2

any ideas?

3

Never had the use for the command... sorry
At the time it was designed for EMC sysmmetrix... later you could use it on a set of disks which are not EMC Symmetrix BCVs using the -f option as the first argument on the command line, the type of underlying disc type will not be checked. It may be worth trying again with -f ...

Anyway knowing what you were trying to do may help us understand you issue or is it
a guess since you started with "suppose"

4

Someone gave you an answer here: IT Resource Center forums - vgchgid missed one disk

For the benefit of other forum members, did that work for you?

5

I posted that there too. Basically:

# vgchgid -f /dev/rdsk/c0t0d0 /dev/rdsk/c0t0d1 /dev/rdsk/c0t0d2
vgchgid: physical volume "/dev/rdsk/c0t0d0" and "/dev/rdsk/c0t0d2" do not belong to the same volume group.

So the -f option won't work.

I know for a fact that the 3 disks did belong to the same VG before (exported from system A then moved to system B where we accidently vgchgid the first two and forgot the third).

Silly mistake, but not my mistake :slight_smile:
No way of fixing so far :eek:

Anyone know of a way (my guess would be to use the dd command to duplicate the first few sectors from c0t0d0 to c0t0d2), but cannot believe others have never enocountered such a issue before :confused:

6

It was mirrored disks you split right?
I would go and remove the PV (pvxreate -f , may have to use rmsf ( long time since I last played with vgs like that...)) and add it back to the group, mirror and start all again...

7

Curious if this would work: vgextend /dev/vg00 /dev/dsk/c0t0d2

8

If you have an old vgcfgbackup , You may restore that onto all the PVs. Then retry the vgchgid with all the disks. That will work . It worked for me in 11.23 and some EMC devices.