Hi there,
I haven't come across this one before but it could be something to do with the fact that your DVD Drive is an older IDE type rather than one using a SATA connection.
It might be worthwhile checking in BIOS that the Onboard GSATA/IDE Ctrl is enabled and that the Onboard SATA/IDE Ctrl Mode is set to IDE.
If everything is working fine, then the message is more of an annoyance than a problem. You don't say what revision your motherboard is or what BIOS version you are running so it is hard to say if updating the BIOS would help.