On Sun, Apr 26, 2009 at 04:50:16PM -0500, Boyd Stephen Smith Jr. wrote: > In <20090426181517.ga9...@m364d1.ece.northwestern.edu>, Zhengquan Zhang > wrote: > >on on of my systems I have > >Filesystem Size Used Avail Use% Mounted on > >/dev/mapper/debian-root > > 224G 12G 200G 6% / > > > >Now I would like to shrink / by 30G so that I have 30G for another OS. I > >wonder if this kind of shrinking is possible. I am using ext3. > > 1. Shrink the filesystem. (For ext3, must be unmounted, so you'll have to > this from a rescue OS.) > 2. Shrink the logical volume. (I *think* this requires it to be unmounted, > so again, a rescue OS is needed.)
I understand the above two steps. I will use resize2fs and lvreduce for that. > 3. Shrink the physical volume. (I'm not even sure LVM supports this. If > this is your only physical volume, and you are using the extents toward the > end, I don't think you'll be able to move the data.) Could you please explain a little bit why I need to do this? Will there be space unformatted after I do the first two steps? > 4. Shrink the partition. (I'm comfortable with fdisk, but gparted is the > recommendation I've heard the most.) If I don't do this, will there be spare space unformatted after I do the first two steps? > > Long story made short: Don't give LVM space you will ever want back. I was in a bit of rush when trying LVM out the first time. I will remember this on the next system. THanks! -- Zhengquan -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org