if [ -e "$sas_rphy_dev/sas_address" ]; then
read rphy_address < $sas_rphy_dev/sas_address
read rphy_id < $sas_rphy_dev/phy_identifier
if [ -e "$sas_rphy_dev/sas_address" ]; then
read rphy_address < $sas_rphy_dev/sas_address
read rphy_id < $sas_rphy_dev/phy_identifier