[Date Prev][Date Next]   [Thread Prev][Thread Next]   [Thread Index] [Date Index] [Author Index]

Re: [linux-lvm] lvm2, extending a physical volume



Hi,

would this be a reasonable course of action?

vgcfgbackup myraid
pvcreate -yff -u wZQg66-cWrF-VDi5-GcRN-aYVg-RQQ3-PPm5K5 /dev/md0
`take the size pvcreate reports and change the backup file accordingly`
vgcfgrestore myraid

Thanks,

Jan

Heinz J . Mauelshagen wrote:
Jan,

you didn't overlook something. There's a bug in the

pvcreate -yff -u wZQg66-cWrF-VDi5-GcRN-aYVg-RQQ3-PPm5K5 /dev/md0
vgcfgrestore myraid

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.

Regards,
Heinz    -- The LVM Guy --


On Tue, Jul 08, 2003 at 11:59:32AM +0200, Jan Dittmer wrote:


Hi,

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

but:

# cat /proc/mdstat
Personalities : [linear] [raid0] [raid1] [raid5] [multipath]

md0 : active raid5 hdc1[4] hdh1[3] hdf1[2] hdg1[1] hde1[0]
      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,

Jan

# 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 sistina com http://lists.sistina.com/mailman/listinfo/linux-lvm 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
                                                  56242 Marienrachdorf
                                                  Germany
Mauelshagen Sistina com                           +49 2626 141200
                                                       FAX 924446
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

_______________________________________________
linux-lvm mailing list
linux-lvm sistina com
http://lists.sistina.com/mailman/listinfo/linux-lvm
read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/



--
Linux rubicon 2.5.75-mm1-jd10 #1 SMP Sat Jul 12 19:40:28 CEST 2003 i686




[Date Prev][Date Next]   [Thread Prev][Thread Next]   [Thread Index] [Date Index] [Author Index]