function all_defined_pdisks

{
   # TURN ON/OFF ALL LIGHTS:
   # Loop through each of the system.s pdisks by using the "lsdev"
   # command with the "-Cc pdisk" switch while using "awk" to extract
   # out the actual pdisk number. We will either
   # turn the identifier lights on or off, specified by the
   # $SWITCH variable:
   #
   # Turn lights on: -y
   # Turn lights off: -n
   #
   # as the $SWITCH value to the "ssaidentify" command, as used below...

echo "\nTurning $STATE ALL of the system.s pdisks...Please Wait...\n"

for PDISK in $(lsdev -Cc pdisk -s ssar -H | awk .{print $1}. | grep pdisk)
do
    echo "Turning $STATE ==> $PDISK"
    ssaidentify -l $PDISK -${SWITCH} || echo "Turning $STATE $PDISK Failed"
done
echo "\n...TASK COMPLETE...\n"

}