I have an ASUS A7V with 2 HDD attached to the ATA100 Controller. I have an HP9300 CDRW as master on the primary IDE controller and a Zip drive as master on the secondary IDE with the new DVD drive as slave on the secondary IDE. When I boot up the BIOS tells me all drives are present, Win98 control panel/system tells me the drives are all present and working correctly. When I insert a DVD the drive works fine. If I try to play music or read data with the DVD drive the drive will sit there and look like its reading and then a dialogue box appears saying the drive is not accessible. I have tried every combination of master and slave o both IDE controllers and the result with the DVD is always the same. Some thoughts would be appreciated. Tony H