Root PV resize

function RESIZE_PV() {
    parted /dev/sda print 
    parted /dev/sda unit b  print 
    pvs
    BEGIN=$(parted /dev/sda unit b  print  | grep -w 2  | awk '{ print $2} ')
    parted -s /dev/sda rm 2
    parted -s /dev/sda mkpart primary $BEGIN 100%
    partx /dev/sda2
    pvresize /dev/sda2
    parted /dev/sda print 
    parted /dev/sda unit b  print 
    pvs
}
$ RESIZE_PV