topic reduce volume group issue in Operating System - HP-UX

reduce volume group issue

itrc55 — Mon, 19 Sep 2011 07:50:21 GMT

Hi,

i want to reduce the volume group on my system from 35 disk to be 30 disk. what is the method to make this without damaged data.

the volume group date is Less than total 30 disk size. my OS is 11.31 and rx8640 server.

Thanks

Re: reduce volume group issue

DeafFrog — Mon, 19 Sep 2011 08:21:07 GMT

Hi ,

Make sure that those disk that you intend to remove , don't have any required FS residing on them.Check this with lvdisplay -v you_lv_name | grep disk_to_be_removed.That being made sure ,proceed with umounting the FS , removing the LV and then finally you can doa vgreduce /dev/disk/diskXX , to remove the disk from volume group.

Regards,

Re: reduce volume group issue

James R. Ferguson — Mon, 19 Sep 2011 12:04:38 GMT

Hi:

Depending upon your logical volume allocation policies, you may also be able to use 'pvmove' to shift disk extents from one physical volume to another thereby freeing some physical volumes from use.

Using 'pvmove' does not require downtime, but take care not to interrupt the process lest the process leave stale logical extents in the logical volume. See the 'pvmove(1M)' manpages for more information.

Regards!

...JRF...