$ Linux Command

Disk

lvresize

Resize an LVM logical volume (extend or reduce).

lvmlogical-volumeresizeextendreducedisk

Additional Notes

lvresize changes the size of an LVM logical volume. It can both extend and reduce volumes, acting as a unified interface for lvextend and lvreduce.

When extending, the volume group must have free physical extents. When reducing, the filesystem must be shrunk first (manually or with -r). The command is commonly used with the -r flag to resize the filesystem at the same time.

Syntax

lvresize [options] logical-volume-path

Parameters

  • logical-volume-path: Path to the logical volume to resize.

Common Options

  • -L size, --size size: New size (e.g., -L 20G). Prefix with + or - to add or remove.
  • -l extents: Size in extents. Use +100%FREE to use all free space.
  • -r, --resizefs: Resize the filesystem together with the LV.
  • -f, --force: Force resize, bypassing safety checks.
  • -n, --nofsck: Skip filesystem check before resize.
  • -A, --autobackup y|n: Control automatic metadata backup.

Examples

lvresize -L +5G /dev/myvg/volume

Add 5 GB to the volume.

lvresize -L 10G /dev/myvg/volume

Set the volume to exactly 10 GB.

lvresize -L -3G /dev/myvg/volume

Reduce the volume by 3 GB.

lvresize -r -L +5G /dev/myvg/volume

Extend the volume and resize the filesystem in one command.

lvresize -l +100%FREE /dev/myvg/volume

Grow the volume to consume all free extents.

Practical Notes

  • When shrinking with -r, the filesystem is checked and resized before the LV is reduced.
  • For XFS, only extension is supported. Shrink XFS volumes by backing up and recreating.
  • Always verify filesystem integrity after a resize, especially when shrinking.
  • Use --resizefs with caution on production systems; test the procedure first if possible.