As far as I can tell this hasn't been covered already, but if it has, I can't find it! My external DVD writer, a Pioneer 107 on the USB2 bus, has issues. When writing, and when verifying, CPU usage hits 90%+, rendering everything else painfully slow; it's confusing since it seems determined to suck up every last bit of time - regardless of how else processing is distributed, the burn process grabs the remainder. This isn't solely limited to Toast (6.0.9), I find the same problems with Disk Utility. Is this a common 'feature' when using the USB2 bus for high-volume, sustained transfers? As far as I remember it was fine with an IDE hard disc. For reference, this is on a revision c. 12" Powerbook.