Logical Volumes (LV's)

lslv (lv)                   Lists the logical volume details
lslv -l (lv)                Lists the physical volume which the LV is on
lsattr -EHl (lv)            Displays more logical volume details

mklv (vg) (No of PP's) (pv Name optional)       Create a logical volume
mklv -y (lv) (PP's) (pv name optional)          Creates a named logical volume
( use -t jfs2 when creating an LV for a JFS2 filesystem )


chlv -n (new lv) (old lv)                       Rename a logical volume
chlv -x (number) (lv)                           Change max no of PP's
chlv -s n (lv)                                  Turns of strickness on the LV
extendlv (lv) (extra No of PP's)                Increase the size of an LV
rmlv (lv)                                       Remove a logical volume

cplv -v (vg to copy to) -y (new lv) (lv)        Copy an LV to a new LV

If copying a filesystem LV, umount the filesystem before copying, otherwise you
will have to fsck the the new LV before the filesystem can be mounted.
If copying a striped LV to an LV that is already created, and the stripe 
size is different ( or not even striped ), then these new parameters are
maintained when the data is copied to the new LV.

cplv -e (new lv) (old lv)   Copy to an existing LV
( new lv must have type as copy use chlv -t copy (new lv) to change )

mklv/extendlv -a = PP alocation policy
-am = middle   -ac = center   -ae = edge
-aie = inner edge    -aim = inner middle

migratepv -l (lv) (old pv) (new pv)
Move a logical volume between physical volumes. Both physical volumes
must be in the same volume group !

mklv -y (lv) -t jfslog (vg) (No of PP's) (pv Name optional)
Creates a JFSlog logical volume.

logform (/dev/lv)       Initialises an LV for use as an JFSlog

getlvcb -AT (lv)        Displays Logical Volume Control Block information