According to your post above you are still on the original firmware for your drive 1.01, first thing I would do is update to 1.06 here:
http://forum.rpc1.org/dl_firmware.php?download_id=2247
Then see if the disc is read better in the drive, from your disc info:
Is never a good sign as to me that says the drive doesn't like the media for some reason. So upgrade the firmware to 1.06 and then see what happens