| Here's another tidbit to add to the puzzle. With two Firewire drives connected I observed normal disc data transfer rates in the Activity Monitor, but the data rate on the Activity Monitor immediately dropped to zero when I switched on power to a third drive (which never did appear on the desktop). When I switched off the power to that third drive again, data transfer rates went right back to normal with no alert from the Finder that a disc had been incorrectly disconnected/removed. |