- Do you have 80 pin IDE cable (the ones with Blue-Gray-Black pins)? If not use the cable that came with your plextor. The black pin must be installed to the motherboard, the blue to master (plextor) and the grey to slave (other ODD).
- Set the jumper on the back of your plextor to Master.
- Unplug the DMA jumper on the back of your plextor.
Let us know what is the DMA mode in the device manager. The drive should be in Ultra DMA Mode 2, or UDMA mode 4. Click here to troubleshoot DMA: http://club.cdfreaks.com/showthread.php?t=101616
For example, I put my PX-716a in master and BenQ in slave, both in secondary IDE channel. Here's a snapshot.