root@debian8:~# lvextend -L +10G -r /dev/vg00/ext4fs Size of logical volume vg00/ext4fs changed from 60.00 GiB (15360 extents) to 70.00 GiB (17920 extents). Logical volume ext4fs successfully resized resize2fs 1.42.12 (29-Aug-2014) Filesystem at /dev/mapper/vg00-ext4fs is mounted on /mnt/ext4fs; on-line resizing required old_desc_blocks = 4, new_desc_blocks = 5 The filesystem on /dev/mapper/vg00-ext4fs is now 18350080 (4k) blocks long.