[linux-lvm] quick pvresize question
Heinz J . Mauelshagen
mauelshagen at sistina.com
Fri Apr 19 08:16:02 UTC 2002
On Wed, Apr 17, 2002 at 11:23:43PM +0000, James Hawtin wrote:
> On Thu, 18 Apr 2002, Trond Are Haugland wrote:
> > Hello people at Sistina!
> > Is it possible/safe to resize a physical volume to use
> > free space _before_ the start block of the pv?
> > Thank you so much for creating LVM for Linux,
> > it absolutely ROCKS :-)
> > --
> > Trond Are Haugland <trondare at trolltech.com>
> > Trolltech AS
> No, its not, pv cannot be expanded or reduced in size, A dirty hack would
> be to create another PV on the disk, just make sure you speficy pvs when
> you do striping so you don't strip the same drive ;-)
You actually can pvresize.
If you have two partitions you can concatinate (fdisk) and
the first holds a PV, pvresize it to take the additional space.
Or you want to take advantage of the extended space in a RAID subsystems
volume (could be MD or a HW subsystem).
> Its fine for concatinated volumes. If you have a spare disk and a little
> time, create a new pv on your space disk use pvmove to mvoe from your old
> disk to the temp. vgreduce out the old disks pv, repartion the disk then
> create a new pv on it. vgexpand to the (old/new disk) then pvmove your
> data back then vgreduce out your temp disk.
> I have done this a few times :-) make sure you use latest version of lvm
> there are some problems with pvmove before that.
> linux-lvm mailing list
> linux-lvm at sistina.com
> read the LVM HOW-TO at http://www.sistina.com/lvm/Pages/howto.html
Heinz -- The LVM Guy --
*** Software bugs are stupid.
Nevertheless it needs not so stupid people to solve them ***
Heinz Mauelshagen Sistina Software Inc.
Senior Consultant/Developer Am Sonnenhang 11
Mauelshagen at Sistina.com +49 2626 141200
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