Extend a LVM btrfs partition

Fri, 11 Mar 2016 06:53:58 +0000

Recently I had the issue, that my root partition (/ or slash) was a bit too small for some update. So I had to look up how to resize the root partition. Luckily with LVM/btrfs this works like a charm (if you added enough free space):

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christian:(hans.heimdaheim.de) PWD:/
Fri Mar 11, 07:02:40 [0] > df -h
Filesystem Size Used Avail Use% Mounted on
udev 2.0G 4.0K 2.0G 1% /dev
tmpfs 396M 428K 395M 1% /run
/dev/dm-1 952M 789M 176M 82% /
none 4.0K 0 4.0K 0% /sys/fs/cgroup
none 5.0M 0 5.0M 0% /run/lock
none 2.0G 0 2.0G 0% /run/shm
none 100M 0 100M 0% /run/user
christian:(hans.heimdaheim.de) PWD:/
Fri Mar 11, 07:02:46 [0] > lvextend /dev/vg0/slash -L2G
 Extending logical volume slash to 2.00 GiB
 Logical volume slash successfully resized
christian:(hans.heimdaheim.de) PWD:/
Fri Mar 11, 07:04:51 [0] > btrfs filesystem resize max /
Resize '/' of 'max'
christian:(hans.heimdaheim.de) PWD:/
Fri Mar 11, 07:04:55 [0] > df -h
Filesystem Size Used Avail Use% Mounted on
udev 2.0G 12K 2.0G 1% /dev
tmpfs 396M 440K 395M 1% /run
/dev/dm-1 2.0G 647M 1.4G 32% /
none 4.0K 0 4.0K 0% /sys/fs/cgroup
none 5.0M 0 5.0M 0% /run/lock
none 2.0G 0 2.0G 0% /run/shm
none 100M 0 100M 0% /run/user

Btrfs on BAFM

Extend a LVM btrfs partition