Shrink ext4 volume
From DWIKI
Run fsck
e2fsck -f /dev/mapper/foo
Check minimum size
e2fsck -P /dev/mapper/foo
gives you minimum size in blocks
Shrink filesystem
resize2fs -p /dev/mapper/foo 500G
Shrink volume
lresize -L 500T /dev/mapper/foo
e2fsck -f /dev/mapper/foo
e2fsck -P /dev/mapper/foo
gives you minimum size in blocks
resize2fs -p /dev/mapper/foo 500G
lresize -L 500T /dev/mapper/foo
