Its your hard disk and not your DVD Writer,,,,, After you have installed the DVD Writer, the hard disk is not being recognized becuz of incorrect jumper settings...
When you physically plug your new DVD Writer, check the back of the device and make it as Slave.. Keep your hard disk as master,,,
Go to BIOS CMOS settings by hitting Del when the system is booting up.... check if your hard disk is being recognized.....
HTH...................... NNJOYYYYYYY...................
