I've just had some OWC Elite Al Pro hard drive enclosures delivered. One is a quad interface (SATA drive to FireWire 400/800, USB 2 and eSATA). I've installed a SATA drive inside. Powered up, plugged into my laptop with FireWire 400. All working great. Copied data, no problems. However, after a couple of minutes the external hard drive goes to sleep - I hear it spin down. Once it does that I cannot access it anymore. The Finder locks up. Only by turning off and on the external power supply can I get the drive to come back to life. The Finder then complains that the drive hasn't been ejected properly, and I have to unplug and plug back in the FireWire cable. What the heck is going on? The label on the power supply says it's a "switching power supply adapter". I think it's bloody cutting the power to the case once the hard drive spins down. It's unusable like this Has anyone else had this problem?