eduwww2:~# pvcreate /dev/cciss/c0d1p5
  Physical volume "/dev/cciss/c0d1p5" successfully created
eduwww2:~# pvcreate /dev/cciss/c0d1p6
  Physical volume "/dev/cciss/c0d1p6" successfully created
eduwww2:~# pvscan
  PV /dev/cciss/c0d0p5   VG eduwww2   lvm2 [68,09 GB / 0    free]
  PV /dev/cciss/c0d1p5                lvm2 [46,57 GB]
  PV /dev/cciss/c0d1p6                lvm2 [90,13 GB]
  Total: 3 [204,79 GB] / in use: 1 [68,09 GB] / in no VG: 2 [136,70 GB]
eduwww2:~#  vgdisplay
  --- Volume group ---
  VG Name               eduwww2
  System ID
  Format                lvm2
  Metadata Areas        1
  Metadata Sequence No  7
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                6
  Open LV               6
  Max PV                0
  Cur PV                1
  Act PV                1
  VG Size               68,09 GB
  PE Size               4,00 MB
  Total PE              17431
  Alloc PE / Size       17431 / 68,09 GB
  Free  PE / Size       0 / 0
  VG UUID               cruEkO-NZRV-CxUz-lNIp-dQXP-wlH0-cuCFr7

eduwww2:~# vgextend
  Please enter volume group name and physical volume(s)
  vgextend: Add physical volumes to a volume group

vgextend
        [-A|--autobackup y|n]
        [-d|--debug]
        [-h|--help]
        [-t|--test]
        [-v|--verbose]
        [--version]
        VolumeGroupName PhysicalDevicePath [PhysicalDevicePath...]

eduwww2:~# vgextend eduwww /dev/cciss/c0d1p5
  Volume group "eduwww" not found.
eduwww2:~# vgextend eduwww2 /dev/cciss/c0d1p5
  Volume group "eduwww2" successfully extended
eduwww2:~# vgextend eduwww2 /dev/cciss/c0d1p6
  Volume group "eduwww2" successfully extended
eduwww2:~# vgdisplay
  --- Volume group ---
  VG Name               eduwww2
  System ID
  Format                lvm2
  Metadata Areas        3
  Metadata Sequence No  9
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                6
  Open LV               6
  Max PV                0
  Cur PV                3
  Act PV                3
  VG Size               204,79 GB
  PE Size               4,00 MB
  Total PE              52425
  Alloc PE / Size       17431 / 68,09 GB
  Free  PE / Size       34994 / 136,70 GB
  VG UUID               cruEkO-NZRV-CxUz-lNIp-dQXP-wlH0-cuCFr7

eduwww2:~# lvextend -L +10G /dev/eduwww2/var
  Extending logical volume var to 12,86 GB
  Logical volume var successfully resized
eduwww2:~#