I just bought a LaCie Rikiki 1TB portable USB drive that keeps dismounting by itself while transferring large video files (up to 1GB). According to a review I read, it requires 900mA to spin up, obviously exceeding the 500 mA normally put out by a USB port. However, according to an Apple support page, the original MBA is listed among laptops having at least one USB port that can provide up to 1100mA for peripheral devices that may require more power. When I checked the System Profiler though, "Current Available Power" is 500 mA, and "Current Required Power" is 0 mA. There is no "Extra Operating Current" item as shown in the screen shot on the Apple page. So, obviously it's ejecting due to not drawing enough power. Is the MBA really capable of providing 1100mA? Currently, the Energy Saver preference for putting the hard disk to sleep is unchecked. Are there any other options I should know about?