topic Re: Need to break the mirror in vg00 in Operating System - HP-UX

Need to break the mirror in vg00

Sreer — Sat, 03 Jan 2009 15:44:13 GMT

Hi gurus,
I have a requirement for removing a disk from the mirrored VG00 after breaking it.
Is it possible to do it on line?
could u pls tell the steps?Thanks in advance..
Rgds
Sreekumar

Re: Need to break the mirror in vg00

Sreer — Sat, 03 Jan 2009 15:51:43 GMT

Hi,
while breaking the mirror Iam getting the follo. error.
# lvreduce -m 1 /dev/vg00/lvol1 /dev/dsk/c2t0d0s2
lvreduce: "MirrorCopies" parameter "1" is not smaller than existing number "1";
therefore no mirrors are removed.
[rx260-01]/
#

Re: Need to break the mirror in vg00

sujit kumar singh — Sat, 03 Jan 2009 15:58:55 GMT

hi u have to do a

#lvreduce -m 0 /dev/vg00/lvol1 /dev/dsk/cxtydy if u already have no of mirrir copies in the VG as 1

this will auto matically update the vgconf file and well can be done online.

remember that in fututre when u will be adding the disk u will have to pvcreate -B, vgextend and lvextend -m 1 the mirror copies

#lvreduce -m 1 /dev/vg00/lvol1 /dev/dsk/cxtydy is used to decrease a mirror from a no higher that 1 mirrir in teh VG.

regards
Sujit

Re: Need to break the mirror in vg00

Sreer — Sat, 03 Jan 2009 16:02:03 GMT

Hello Sujith ,
Excellent! You are ri8.I have used 0 instead of 1 now its perfect.Thanks!!

# for i in lvol1 lvol2 lvol4 lvol5 lvol6 lvol7 lvol8
> do lvreduce -m 0 /dev/vg00/$i /dev/dsk/c2t0d0s2
> done
It worked for me.

Rgds

Sreekumar

Re: Need to break the mirror in vg00

Sreer — Sat, 03 Jan 2009 16:03:04 GMT

Hello,

# for i in lvol1 lvol2 lvol4 lvol5 lvol6 lvol7 lvol8
> do lvreduce -m 0 /dev/vg00/$i /dev/dsk/c2t0d0s2
> done

This was the exact command I used.

Re: Need to break the mirror in vg00

sujit kumar singh — Sat, 03 Jan 2009 16:08:57 GMT

more so ever this is an integrity machine so while adding the mirror disk again in future u will need to do

following the reduction of the mirror copies from the disk, u will need to do a vgreduce with that disk amke sure that u edit the /stand/bootconf to remove the entry of that boot disk and do an lvlnboot -R

when in future u will be adding the Disk to vg00 for mirroring keep in the view the following things.

1) create the EFI,HPand HPSP partitions in the disk
2)pvcreate -B on /dev/rdsk/cxtydzs2 and so on

and after that vgextend and mirror like

#lvextend -m 1 /dev/vg00/lvol1 /dev/dsk/cxtydzs2

Regards

Sujit