...unless i disconnect one of them. Neither of my two DVD-RW drives will boot any bootable CD while they are both attached to the same IDE cable. They are set up as Master and Slave. I have also tried them both as Cable Select' but it had no effect. If it tries to boot from a CD with them both connected, the PC just freeezes at the 'Boot from CD' screen. The drive will read the disc, the LED will go out, the CD will spin up, but then thats it. Nothing.
Motherboard is an ECS KV2 Extreme, and the drives are an Aopen DUW1616L and a LiteOn SHW-16H5S.