When I shutdown my new iMac and try to restart it, it gets to the first gray screen (before the dark gray Apple symbol) and stops loading. It won't do anything for minutes at at time, until I unplug the FW800 cord from the back of the machine. Once unplugged, the mac continues to start up like normal, only taking about 40 seconds from that point on. The FW800 is connected to a iomega 750 ultramax HD, with another iomega 750 ultramax HD daisychained (through FW800) to it. I use the first drive as my iTunes library drive, and the second one as a mirror-copy backup of the first drive. Does anyone have any idea why this drive would be preventing the machine startup, and how I can solve the problem!?! Thanks.