Moving extents on one disk to another disk

[Danny Baldono]

I have two node cluster (HPUX-SG).
I need to remove two luns on a vg (cluster lock vg vgsapsys). The two luns are c9t2d0 and c9t2d1. The two luns are part of a vg (vgsapsys) comprises of ten luns. I want to remove these luns but these luns contain two lv's. I still need one of the lv's. The c9t2d0 contains lv's lvabap and lvabapvanman while the c9t2d1 has lvabap and lvabapsss. I still need the twoo lvabap's on the two luns. How can I transfer this to another lun in the same vg vgsapsys. Will it affect my data?

[Pedro Cosmen]

Hello Danny,

The command pvmove will do this.

# pvmove -n /dev/vgsapsys/lvabap /dev/dsk/c9t2d0 /dev/dsk/lun_of destination.

And the same with c9t2d1.

Regards.

[Mobeen_1]

Danny, please do the following

pvmove -n

regards
Mobeen

[Danny Baldono]

Remember this is on the Service Guard environment. I already done this, my concern is that this is in a cluster. Is there any other things to like vgexport/vgimport. If I pvmove the lv to another disk will it not affect my data. Do my application will run after this pvmove.

[Danny Baldono]

The primary reason for the pvmove is to free the two disks (c9t2d0 and c9t2d1)that I have.
Can I do the pvmove online without affecting my running application on which these two disks are on the same vg. Please check my procedure if this is correct.

1. cp - p /etc/lvmconf/vgsapsys.conf /etc/lvmconf/vgsapsys.conf.org. I am doing this in case the pvmove fails I still can go back to the old config.
2. pvmove -n /dev/vgsapsys/lvabap /dev/dsk/c9t2d0 /dev/dsk/c8t11d3
3. pvmove -n /dev/vgsapsys/lvabab /dev/dsk/c9t2d1 /dev/dsk/c8t11d3
4. lvremove -f /dev/vgsapsys/lvabapvanman
5. lvremove -f /dev/vgsapsys/lvabapsss
6. vgreduce /dev/vgsapsys /dev/dsk/c9t2d0
7. vgreduce /dev/vgsapsys /dev/dsk/c9t1d0

[Pedro Cosmen · Accepted solution]

Danny,

If this Vg is part of the cluster, you must reflect the changes in the rest of the nodes.

On the node you have made the pvmove:

# vgexport -p -m mapfile vgsapsys

Then copy the mapfile to the oher node(s)

On the other node(s):

# ll /dev/vgsapsys/group (to see the minor number)
# vgexport vgsapsys
# mkdir /dev/vgsapsys
# mknod /dev/vgsapsys/group c 64 0xNN0000 (where NN is the same that had before)
# vgimport -m mapfile /dev/vgsapsys /dev/dsk/... (the PV's of vgsapsys in each node)

Regards