A friend has this configuration:
QDI Legend V with Celeron 366
128 mb ram
W.Digital 4.3 Gb Primary, Samsung 2.1 Secondary on #1 IDE channel
Asus 40X Primary, HP 8100 Secondary on #2 IDE channel
Matrox g100 agp
Diamond monster 3d II 8mb
S. Blaster awe64

The problem is that he is not able to make a cd copy! Using CD to CD copy with cdr-win 3.7f is not possible because audio-extraction of Asus 40X is only 4X, but even making a cd image is a problem (cdrwin says: DAO recording error). I have tried all IDE combinations (primary slave, etc.) but with no results. I tried with Nero 4.0.3.5 with no success.
The only cd that he could make was a cd with only data files (no audio). I tried to use HP in my system, and I was able to make a cd to cd copy without DAO error messages (but I have a SCSI Plextor), so I can't say that the problem is HP!
Any ideas?