Shrink a mounted LVM partition
- by javanix
I fear I already know the answer to this question, but here goes.
I need to carve out a new partition on a running system. /var/ is mounted from an LVM volume (hdd1_vg-var) and has only 3% used disk space.
/ is mounted separately (hdd1_vg-root) and has about 80% used disk space.
Filesystem Size Used Avail Use% Mounted on
/dev/**/hdd1_vg-root
2.0G 1.4G 481M 75% /
/dev/**/hdd1_vg-var
33G 699M 31G 3% /var
Unfortunately I don't have any free extents to grow this partition organically - vgdisplay shows:
Total PE 10000
Alloc PE / Size 10000 / 39.06 GB
Free PE / Size 0 / 0
So seeing that I have all this free disk space on /var/, can I shrink /var/ without un-mounting it or is this just a pipe dream?
I am really hoping to be able to do this work on a running system - un-mounting would of course not be difficult but it would interfere with system functionality.
