Share 'Quick question on G4 Cube booting from firewire drive...'

Is this a known issue? I've found one other forum topic on macosxhints.com, but no proper idetification of the problem. Basically, I've a new terabyte Western Digital drive, onto which I installed OS 10.3. When I run Startup Disk, from the OS X installer application running from the CD, I can select the Firewire drive. However, on bootup, the Cube doesn't recognise it. boooo! So is it somethi...