Being a new poster, although certainly not 'new' to this forum, I'm almost certain I've seen this issue covered. However, I can't seem to find that thread now, so I will risk the ire of the group by asking one more time. My setup includes two bootable clones of my Sys and Apps drive as backups, one being an external drive from which I can boot my PPC G5 if necessary. In a couple of weeks I will be purchasing a 3.2GHz Mac Pro refurb. Obviously a huge upgrade and one that has been needed for far too long. My business relies on the G5 in various ways everyday, and the Mac Pro will of course be lightening fast in comparison. Now to my question, finally. I seem to recall reading somewhere that the Mac Pro cannot be booted from an external drive. I hope I'm wrong, since I'll be loading up the Mac Pro with drives(5 total) and one bootable external HDD as well if that will work. Thanks in advance for any advice you folks can offer.