RE: [linux-lvm] Situation with PVRESIZE command

["Roger Lucas" <roger@planbit.co.uk>]

Hi,

I've found Alasdair's mail from ~1 year ago on something in this area, but
it isn't quite the answer that I was looking for.

http://www.redhat.com/archives/linux-lvm/2004-December/msg00049.html

Is there anyone on this mailing list that can help with my PVRESIZE
questions below?

Thanks,

Roger


> -----Original Message-----
> From: linux-lvm-bounces@redhat.com [mailto:linux-lvm-bounces@redhat.com]
> On Behalf Of Roger Lucas
> Sent: 21 February 2006 18:01
> To: 'LVM general discussion and development'
> Subject: [linux-lvm] Situation with PVRESIZE command
> 
> Hi,
> 
> I am running LVM on top of a large RAID controller with a 16-drive
> capability (of which just 4 disks are currently active).  The RAID array
> appears as a single SCSI disk, "/dev/sda".  A quick summary of the LVM
> information is below.
> 
> tiger:~# lvm version
>   LVM version:     2.01.04 (2005-02-09)
>   Library version: 1.01.00-ioctl (2005-01-17)
>   Driver version:  4.4.0
> tiger:~# pvs
>   PV         VG      Fmt  Attr PSize   PFree
>   /dev/sda   storage lvm2 a-   745.05G 39.05G
> tiger:~# vgs
>   VG      #PV #LV #SN Attr  VSize   VFree
>   storage   1   3   0 wz--n 745.05G 39.05G
> tiger:~# lvs
>   LV   VG      Attr   LSize Origin Snap%  Move Copy%
>   home storage -wi-ao 2.00G
>   root storage -wi-ao 2.00G
>   var  storage -wi-ao 2.00G
>   main storage -wi-ao 700.0G
> tiger:~# mount
> /dev/mapper/storage-root on / type reiserfs (rw)
> proc on /proc type proc (rw)
> sysfs on /sys type sysfs (rw)
> devpts on /dev/pts type devpts (rw,gid=5,mode=620)
> tmpfs on /dev/shm type tmpfs (rw)
> /dev/hda1 on /boot type ext3 (rw,noatime)
> /dev/mapper/storage-home on /home type reiserfs (rw)
> /dev/mapper/storage-var on /var type reiserfs (rw)
> /dev/mapper/storage-main on /main type reiserfs (rw)
> usbfs on /proc/bus/usb type usbfs (rw)
> tmpfs on /dev type tmpfs (rw,size=10M,mode=0755)
> tiger:~#
> 
> I now need to increase my RAID capacity.  I can increase the physical RAID
> capacity by adding another disk to the controller and getting it to re-
> build
> the array in the background, thus increasing the size of "/dev/sda", but I
> am not clear as to how I can increase the PV size in LVM.
> 
> I have seen some references to a "pvresize" command, but it isn't in the
> latest 2.01.15 stable release (although it does appear in the 2.02.02
> development release).
> 
> Hence, my questions are:
> 
> - Is it possible to re-size a PV whilst the system is online using the
> 2.01.15 tools?
> 
> - Is it possible to re-size a PV whilst the system is online using the
> 2.02.02 tools?
> 
> - How "stable" are the 2.02.02 tools, and are there any specific bugs in
> them that may cause problems during typical usage.
> 
> Thanks,
> 
> Roger
> 
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