root@debian8:~# umount /mnt/ext4fs root@debian8:~# resize2fs /dev/vg00/ext4fs 60G resize2fs 1.42.12 (29-Aug-2014) Please run 'e2fsck -f /dev/vg00/ext4fs' first. root@debian8:~# e2fsck -f /dev/vg00/ext4fs e2fsck 1.42.12 (29-Aug-2014) Pass 1: Checking inodes, blocks, and sizes Pass 2: Checking directory structure Pass 3: Checking directory connectivity Pass 4: Checking reference counts Pass 5: Checking group summary information /dev/vg00/ext4fs: 1526/4587520 files (0.1% non-contiguous), 334997/18350080 blocks root@debian8:~# resize2fs /dev/vg00/ext4fs 60G resize2fs 1.42.12 (29-Aug-2014) Resizing the filesystem on /dev/vg00/ext4fs to 15728640 (4k) blocks. The filesystem on /dev/vg00/ext4fs is now 15728640 (4k) blocks long. root@debian8:~# lvreduce -L 60G /dev/vg00/ext4fs WARNING: Reducing active logical volume to 60.00 GiB THIS MAY DESTROY YOUR DATA (filesystem etc.) Do you really want to reduce ext4fs? [y/n]: y Size of logical volume vg00/ext4fs changed from 70.00 GiB (17920 extents) to 60.00 GiB (15360 extents). Logical volume ext4fs successfully resized