persefone# lvcreate -L 40M -n test1 vg1
lvcreate -- doing automatic backup of "vg1"
lvcreate -- logical volume "/dev/vg1/test1" successfully created

persefone# lvdisplay /dev/vg1/test1 
--- Logical volume ---
LV Name               /dev/vg1/test1
VG Name               vg1
LV Write Access       read/write
LV Status             available
LV #                  2
# open                0
LV Size               40 MB
Current LE            10
Allocated LE          10
Allocation            next free
Read ahead sectors    120
Block device          58:1