The following steps will show you how to shrink an LVM volume. In this example, we will be shrinking volume VolGroup00-LogVol00 down to 20GB.
Please Note: This can and will cause data loss if performed improperly or on a volume that you attempt to shrink below the current volume usage. With that said, the steps are as follows:
e2fsck -f /dev/mapper/VolGroup00-LogVol00
By tilisha, January 24, 2015