[linux-lvm] lvm2, extending a physical volume
Heinz J . Mauelshagen
mauelshagen at sistina.com
Wed Jul 9 03:05:02 UTC 2003
you didn't overlook something. There's a bug in the
pvcreate -yff -u wZQg66-cWrF-VDi5-GcRN-aYVg-RQQ3-PPm5K5 /dev/md0
trick we'll fix ASAP (vgcfgrestore should keep the new size which it doesn't).
We're thinking about a pvresize command to make this smoother.
Heinz -- The LVM Guy --
On Tue, Jul 08, 2003 at 11:59:32AM +0200, Jan Dittmer wrote:
> I posted this a while ago on lvm-devel, but received no answer.
> I'm using kernel 2.5(.74-mm2) with LVM2 and have a RAID5 to which I
> added a new disk with raidreconf. This worked fine, but lvm doesn't
> recognize the extra disk space:
> # pvdisplay
> --- Physical volume ---
> PV Name /dev/md0
> VG Name myraid
> PV Size 335.36 GB / not usable 0
> Allocatable yes (but full)
> PE Size (KByte) 4096
> Total PE 85853
> Free PE 0
> Allocated PE 85853
> PV UUID wZQg66-cWrF-VDi5-GcRN-aYVg-RQQ3-PPm5K5
> # cat /proc/mdstat
> Personalities : [linear] [raid0] [raid1] [raid5] [multipath]
> md0 : active raid5 hdc1 hdh1 hdf1 hdg1 hde1
> 468872704 blocks level 5, 4k chunk, algorithm 2 [5/5] [UUUUU]
> which translates to ~480 GB (5x 120GB)
> Somewhere I found a post, that with vgcfgbackup / vgcfgrestore one is
> able to resize the volume. But simply backing up and restoring the
> descriptor just gets me to the same situation.
> As I've another partition (which isn't that important) I tried to change
> the backup manually, ie. I changed pe_count in the backup file and
> restored it. This works fine - but how do I figure the correct PE count
> for this bigger disk? I just don't want to poke around until it says,
> 'hey, too big, trashing your data'. There has to be a simple way, I
> guess, which I totally overlook. It isn't that big of a change.
> pvresize tells me it isn't implemented.
> Thanks for any insight,
> # vgdisplay --version
> LVM version: 1.95.15 (2003-01-10)
> Library version: 0.96.08-ioctl (2003-03-27)
> Driver version: 1.0.6
> Linux rubicon 2.5.74-mm2-jd4 #1 SMP Sun Jul 6 09:55:20 CEST 2003 i686
> linux-lvm mailing list
> linux-lvm at sistina.com
> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
*** 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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