I think I have a similar if not same issue!!
I recently purchased a Samsung DVD-ROM SH-D163A SATA drive. However it’s got a really strange problem - it will read all formats of DVD media that I’ve tried, but has a problem with DVD-R that has a boot sector! So DVD-Video format won’t work, bootable DVD software discs won’t work either. However, the same type of media works fine if it’s just data on the disc (ie not bootable)!
But bootable DVD+R media works! I have good quality TY DVD-R discs and find it really strange that they kind of work. Whats more, if I put a bootable DVD-R disc in the drive the icon of the drive in Windows changes to indicate there is a disc inserted, but when I click on it, it says Access Denied (not that it couldn’t read the disc). I’m using Vista, but it won’t work in the BIOS either (When trying to boot OS DVD for example).
I’ve checked the firmware for the drive and I have the latest version, updated motherboard drivers etc. How can a drive just have a problem with -R bootable media when the same media works if it’s not bootable???
Surely it couldn’t be the power supply??? I have 380W and else everything is running fine… and Core 2 Duo’s are supposed to use less power!