On 10/17/07, Steve Shockley <[EMAIL PROTECTED]> wrote: > Edwards, David (JTS) wrote: > > I'm using 250G laptop disks powered from the USB cable. > > Maybe you're hitting the limit of the USB power output?
Agreed. Use two separate full-power USB ports (i.e. neither port shares any of each other's power) and try again. Invest in a powered USB hub if you must. Each disk will be consuming more than 1.25W, and the USB spec maxes out at 2.5W per powered port. -Mark C.