Hello All I was able to clone my primary HD / Panther to an external FW backup HD using Carbon Copy Cloner. And the cloned FW HD booted up OK BTW. I opted to install Panther via updating the existing Jag 10.2.6 OS on my primary HD Total time for the two disk installation was ~ 50 minutes Albert Dual 1.25 GHz PowerPC G4 (FW800 model) 1.75 GB DDR SDRAM OS Panther 10.3 OS Jaguar 10.2.6 ( backup)