> There are a few very low power drives can can be powered through the USB > port, usually they are of the 2.5 inch drives that are used in laptop > computers and usually require a PCI card which will provide the energy > needed. > I don't think any of the older PPC Macs can boot from a USB connected drive, and the same may apply to some early Intel Macs, too. FYI, the FW & USB build your own enclousures are becoming rare, and even more rare are off the shelf external drives with FW connections. Tis a sign of the times I guess. Ron