OK, let me try step-by-step. Motherboard: Asus P2B, latest BIOS from March 2000. Does not support UDMA66/100. CPU: PII 350MHZ. Clock: 100MHZ. RAM: 327MB, SDRAM. Drive: WD, 54 RPM, 10GB. I don't think the drive supports UDMA66/100, so I disabled it just in case. Currently: HDD on IDE1 as master; CDROM on IDE0 as master. Presently, I connected both using regular 40-pin cables. Also tried 80-pin conductor for HDD, but no change. Any more info? Thanks, Vic