#find first available block device (sda or vda likely)
#TODO: pick a likely non-SAN target if possible

shopt -s nullglob

#first take the disk with the MAX WWN numer to be the installdisk
if [ -z "$instdisk" ]; then
   disks=$(awk -F' '  '{print $4  }' /proc/partitions |grep -e "sd[a-z]$")
   for disk in $disks; do
      diskinfo=$(udevadm info --name $disk)
      diskname=$(IFS= ;echo $diskinfo|grep '\<DEVNAME\>'|cut -d "=" -f2|tr A-Z a-z)
      devtype=$(IFS= ;echo $diskinfo|grep '\<DEVTYPE\>'|cut -d "=" -f2|tr A-Z a-z)
      devwwn=$(IFS= ;echo $diskinfo|grep '\<ID_WWN\>'|cut -d "=" -f2|tr A-Z a-z)
      [  "$devtype" != "disk" ]  && continue
      diskentry=$diskentry"$diskname $devtype $devwwn\n"
   done
   instdisk=$(echo -e $diskentry|grep -v "^$"|sort  -k 3 -b -r|cut -d" " -f1|head -n 1)
fi

#TODO: ondisk detection, /dev/disk/by-id/edd-int13_dev80 for legacy maybe, and no idea about efi.  at least maybe blacklist SAN if mptsas/mpt2sas/megaraid_sas seen...
if [ -z "$instdisk" ]; then
	for disk in /dev/sd*[^0-9]; do
		currdriver=`udevadm info --attribute-walk --name $disk |grep DRIVERS|grep -v '""'|grep -v '"sd"'|head -n 1|sed -e 's/[^"]*"//' -e 's/"//'`
		case "$currdriver" in 
		"ata_piix4"|"PMC MaxRAID"|"ahci"|"megaraid_sas") #certainly direct
			if [ -z "$firstdirectdisk" ]; then firstdirectdisk=$disk; fi #remember first disk as a guess of medium resort
			;;
		"mptsas"|"mpt2sas"|"mpt3sas") #*PROBABLY* not SAN, but SAS SAN is possible
			if [ -z "$probablyfirstdirectdisk" ]; then probablyfirstdirectdisk=$disk; fi #remember first disk as a guess of medium resort
			;;
		*)
			if [ -z "$firstdisk" ]; then firstdisk=$disk; fi #remember first disk as a guess of medium resort
			;;
		esac
	done
fi

if [ -z "$instdisk" ]; then
	if [ ! -z "$firstdirectdisk" ]; then 
		instdisk=$firstdirectdisk 
	elif [ ! -z "$probablyfirstdirectdisk" ]; then
		instdisk=$probablyfirstdirectdisk 
	elif [ ! -z "$firstdisk" ]; then
		instdisk=$firstdisk 
	fi
fi
# Could not determine the install disk for whatever reason,
# try the default /dev/sda
if [ -z "$instdisk" ]; then
    instdisk="/dev/sda"
fi



echo "part PV.01 --ondisk=$instdisk" >> /tmp/partitioning
echo "volgroup ibmpkvm_rootvg PV.01" >> /tmp/partitioning