I've got a 200GB external HDD that I hook up to my PowerBook using Firewire. The drive enclosure also has USB. Which is better to use? Firewire or USB? I'm asking because I've found Firewire to be a bit unreliable. When the drive is plugged in and powered up, sometimes it will mount, sometimes it won't. To force it to mount, I either need to reconnect the Firewire cable, or boot the drive again. Sometimes, when it doesn't mount, I can see it in Disk Utility, but the Mount button is greyed out. The biggest problem is when the PowerBook wakes from sleep. If the drive is mounted via Firewire and the Book goes to sleep, when the Book wakes, the drive can't be accessed - the Finder locks up with a beachball of death, and if I open Disk Utility, it also crashes and burns. The external drive is still - apparently - mounted, because the icon is still on the desktop. If I yank the Firewire cable, suddenly Disk Utility and the Finder respond, and I get a warning about disconnecting the drive without ejecting. When connected via USB, this wake from sleep isn't a problem - the drive is accessible and it's business as usual. So firstly, are these issues with Firewire, or it is my drive? Is there anything I can do to improve the Firewire performance and get rid of these issues? Or should I switch to using USB?