#!/bin/bash

MULTIPATH_BINDINGS=/etc/multipath/bindings
CASTVG=fccast

get_disk_size () {
	diskpath=$1
	#parted -s $diskpath unit b print | sed -n '/^Disk/s/[^:]\+: \([0-9]\+\)B/\1/p'
	# in case no disk label - parted is unable to output disk size, lets use old good fdisk
	fdisk -l $diskpath | sed -n '/^Disk/s/[^,]\+, \([0-9]\+\) bytes/\1/p'
}

for fc in $( cat $MULTIPATH_BINDINGS | sed -n '/^fc-/p' | sed 's/^fc-\([^ ]\+\) .*/\1/' ); do
    fcpath=/dev/mapper/fc-$fc
    lvpath=/dev/${CASTVG}/$fc

    lvs $lvpath > /dev/null 2>&1
    if [ $? -ne 0 ]; then 
	fcsize=$( get_disk_size $fcpath )
	lvcreate -L ${fcsize}B -n $fc ${CASTVG}
    fi
    dd if=$fcpath of=$lvpath bs=1M
done