My system has two harddrives. One is Ultra ATA/66, and the other ATA/Fast-2 (16.7 MB/s). My system is an older Pentium-133MHZ, with possibly a PCI bus speed of 33MHZ. Originally, both drives were on the same interface cable connected to the Primary IDE controller on the motherboard. However, I wanted to benefit from the speed capacity of the UDMA ATA/66 drive. So I purchased an ATA/66 add-in adapter(controller) card. My questions are: 1- If I place the Ultra ATA/66 drive(as Single,Master) on the Primary channel of the interface card, and place the ATA/Fast-2 drive(as Master) on the Secondary channel along with the ATAPI Cd-rom(as Slave), will this allow the ATA/66 drive to operate at a theoretical speed of 66MB/s (w/ a 80-pin cable)? 2- Will the slower devices on the Secondary channel cause both channels on the ATA/66 interface card to operate at 16.7 MB/s, or will the speed of the Primary channel be independent of the Secondary channel? Thanx