I dunno. Was no problem for me. (ASUS P5B). (was after all, read further)
Plugged an IDE DVD-ROM first. Worked just fine. Then an IDE hard-drive. - wouldn't see it.
Turned out that the controller doesn't handle the "cable select" mode quite well. So I had to jumper the drives to master and slave.
However, that was not the end of it. A year old WD1200JB, which was always treated well and was cooled by Zalman 2HC-2 started clicking.
I mean it worked, but started giving out periodical clicks every 4-5 seconds. Not particularly loud, but disturbing.
Too bad, I wanted to dedicate that drive exclusively to emule.
the DVD-burner works fine though, hasn't made a coaster yet.