Extend LVM Logical Volume on Linux (Step-by-Step Guide)

When a Linux server runs out of root disk space, LVM (Logical Volume Manager) lets you extend volumes online without reinstalling. This guide covers adding a new disk or free PEs, extending the logical volume, and growing the filesystem.

Step 1: Check Volume Group Free Space

Run vgs and lvs to see VG free space and LV sizes before extending.

Step 2: Extend the Logical Volume

Use lvextend -L +10G /dev/vg0/root or lvextend -l +100%FREE to consume remaining VG space.

Step 3: Grow the Filesystem

For XFS run xfs_growfs /. For ext4 use resize2fs /dev/vg0/root. Verify with df -h.

Add a new physical disk (optional)

lsblk
pvcreate /dev/sdb
vgextend vg0 /dev/sdb
lvextend -l +100%FREE /dev/vg0/root
xfs_growfs /

Related tutorials

• Check Disk Space (df, du, ncdu)
• LVM Extend Shell Script
• Disk Monitor Script

Terminal screenshots are original illustrations created for Gnome IT Solutions (blog.gnomeitsolutions.com).