topic Mirrored LV's in Operating System - HP-UX

Mirrored LV's

Michael Elleby III_1 — Wed, 10 Apr 2002 12:33:51 GMT

Can I break a mirror of a vg that is Cluster Aware????

I want to use the 2nd disk for another vg that I am going to add to a separate package.

Thanx.

Mike

Re: Mirrored LV's

Domenico_5 — Wed, 10 Apr 2002 12:47:39 GMT

hi

Yes, you can do this but you must recreate the vg info whit same configuration on all nodes.

so, on the server with the pakage you can do:
1) lvreduce -m 0 /dev/vgxx
2) vgreduce /dev/vgxx /dev/dsk/cXdXyX
3) vgexport -v -p -s -m /tmp/vgxx.map /dev/vg00
4) rcp /tmp/vgxx other nodes

on the other nodes:

1) vgexport /dev/vgxx
2)mkdir /Dev/vgxx
3)mknod /dev/vgxx group c 64 0x
2) vgimport -v -m /tmp/vgxx.map /dev/vgxx

and thas all

bye

Re: Mirrored LV's

Robert Gamble — Wed, 10 Apr 2002 12:49:45 GMT

Michael,

I have followed the procedure Domenico documented many times in the past.

Follow that and you shouldn't have any problems.

Good Luck!

Re: Mirrored LV's

Frederic Sevestre — Wed, 10 Apr 2002 12:51:32 GMT

Hi,

Yes you can, but be careful.

Reduce the mirror on the server where the vg is active.
Remove the disk which not containing the cluster lock (check in /etc/cmcluster/cluster.ascii)

For each lv :
#lvreduce -m 0 /dev/vgx/lvolxx

then
# vgreduce vgx /dev/dsk/cx...

then generate a mapfile
# vgexport -p -v -s -m mapfile.vgx vgx

send this mapfile on the other node :
# rcp mapfile.vgx nodeB:/tmp/mapfile.vgx

Then on the other node :
# vgexport vgx
# mkdir /dev/vgx
# mknod /dev/vgx/group c 64 0x.....
# vgimport -v -s -m /tmp/mapfile.vgx vgx

Now you can use the pv

Regards,
Fr??d??ric

Re: Mirrored LV's

Michael Elleby III_1 — Wed, 10 Apr 2002 13:04:59 GMT

Domenico-

Thanx for the info, worked like a charm...

Mike-