Volume Groups (VG's)

lsvg              Lists all volume groups
lsvg (vg)         Lists the volume group details
lsvg -l (vg)      Lists all logical volumes in the volume group
lsvg -p (vg)      Lists all physical volumes in the volume group
lsvg -o           Lists all varied on volume groups

varyonvg (vg)           Vary On a volume group
varyonvg -f (vg)        Forces the varyon process
varyonvg -s (vg)        Vary on a VG in maintenance mode. LV commands can be 
                        used on VG, but LV,s cannot be opened for I/O.
varyoffvg (vg)          Vary Off a volume group

synclvodm (vg)          Tries to resync VGDA, LV control blocks and ODM.
synclvodm -v (vg)       Rebuilds the LVCB.
(the vg needs to be varied on before running synclvodm)


mkvg -y(vg) -s(PP size) (pv)    Create a volume group
mkvg -y datavg -s 4 hdisk1

reducevg (vg) (pv)       Removes a volume group
reducevg -d (vg) (pv)    Removes a volume group and delete all LV's on the PV
reducevg (vg) (PVID)     Removes the PVID disk reference from the VGDA when a
                         disk has vanished without the reducevg (vg) (pv)
                         command being run first.
reducevg -df (vg) (pv)   Deletes all LV's from the VG and removes the VG
                         from the disk. If the last disk in the VG then
                         the VG is deleted.
                                
extendvg (vg) (new pv)   Adds another PV into a VG.

exportvg (vg)            Exports the volume group, removes the VG entries and
                         removes all FS entries from /etc/filesystems but
                         leaves the mount points.

Note : Cannot export a VG if it has active paging space, turn off paging,
       reboot before exporting VG. Exporting removes entries from filesystems
       file but does not remove the mount points.

chvg -a y (vg)                  Auto Vary On a volume group at system start.
chvg -u (vg)                    Unlocks a locked volume group.

lqueryvg -Atp (pv)              Details volume group info for the hard disk.

importvg -y (vg name) (pv)      Import a volume group from a disk.
importvg (pv)                   Same as above but VG will be called vg00 etc.

4.3 onwards, importvg will automatically varyon the VG.

chvg -Q (y/n) (vg name)         Turns on/off Quorum checking on a VG.

reorgvg (vg) (lv)        Reorganised a fragmented LV, must state an LV at the 
                         command line else the first LV in the VG is picked.
                         Does not reorg the PP's of striped LV's.