lvreduce

Reduce volume to specific size

$ sudo lvreduce -L 120G [logical_volume]

$ sudo lvreduce -L -40G --resizefs [logical_volume]

lvreduce [options] -L size lv

lvreduce reduces the size of a logical volume. This is a destructive operation that should only be performed after reducing the filesystem inside the volume.

-L, --size SIZE

New size (or -SIZE to reduce by amount)

Also resize underlying filesystem

Force reduction without confirmation

Skip filesystem check

Test mode (don't apply changes)

Data loss risk: Always backup before reducing. Filesystem must be reduced first unless using --resizefs. ext4 supports online shrinking only with --resizefs.

lvextend(8), lvresize(8), resize2fs(8)