Originally Posted by macdiez
I had a acomdata 160 gb usb 2.0 HD on a imac working great before leopard. Since updating I had the same problem. I was able to solve the problem after a few days this way. It seems that leopard limits the energy coming from the usb port of the computer, so the HD does not function right (so it is not recognized by the computer). You need to connect the usb cable to 2 usb port (to get more energy) or get an optional ac power adapter to get the drive working. Since doing this the drive works normally on 2 different computers upgraded to leopard, but did not work previously. Good luck.
I don't understand this post. My USB HDD comes with its own AC power adapter. I am able to install the software as it is recognized. However, once the software is installed, when I log in, my machine does not see the drive as being attached. I tried on both machines and the exact same thing happens.
The HDD does work in Boot Camp and also worked before upgrading so I know the problem is either the driver or a conflict with OS X. I purchased another drive for $80 for now but I would like to see this get resolved.
I also emailed Acomdata a few days ago and not heard back. I don't expect any tech support from them.