[linux-lvm] Reduce an LVM volume split on two physical disks

Bryan Whitehead driver at megahappy.net
Mon Mar 29 21:18:44 UTC 2010

Reducing the size of the LV is possible, but the filesystem sitting on
top likely cannot be reduced.
(there are some guides to resize ext3, such as:
http://www.howtoforge.com/linux_resizing_ext3_partitions )

Use an external disk (usb/firewire) and add it to the volume group
where the two logical disks are on. migrate data off the second disk,
replace disk, then migrate data off the external disk, and then remove
the external disk.

On Mon, Mar 29, 2010 at 1:24 PM, Mathieu Chartier
<mchartier at cegepsth.qc.ca> wrote:
> Hi,
> I have an LVM volume of 1.8TB split on two physical disk that have a 900
> someting GB partition on each of them.
> I need to change the second disk, and only 396GB og the 1.8TB is used...so
> can I reduce the size of the LVM volume to only the first disk, change the
> second disk and expand after the LVM volume to the second disk?
> The volume is in LVM2
> Regards,
> Mathieu Chartier
> Technicien Informatique
> Cégep de Saint-Hyacinthe
> tél:  450 773-6800 Poste 153
> ligne Mtl (514) 875-4445 Poste 153
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> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/

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