persefone# e2fsadm -L 15M /dev/vg1/test1 
e2fsadm -- correcting size 15 MB to physical extent boundary 16 MB
e2fsck 1.19, 13-Jul-2000 for EXT2 FS 0.5b, 95/08/09
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/vg1/test1: 11/14336 files (0.0% non-contiguous), 1828/53248 blocks
resize2fs 1.19 (13-Jul-2000)
Begin pass 3 (max = 7)
Scanning inode table          XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
The filesystem on /dev/vg1/test1 is now 16384 blocks long.

lvreduce -- WARNING: reducing active logical volume to 16 MB
lvreduce -- THIS MAY DESTROY YOUR DATA (filesystem etc.)
lvreduce -- doing automatic backup of volume group "vg1"
lvreduce -- logical volume "/dev/vg1/test1" successfully reduced

e2fsadm -- ext2fs in logical volume "/dev/vg1/test1" successfully reduced to 16 MB