[X-Newbies] Cloning bootable system problem

[SaulBro at aol.com]

I am trying to set up my recently-acquired B&W G3/300 (rev.1) running 10.3.9. 
  Since the startup drive is only 6gb, I am trying to trying to clone all the 
files on that drive onto a larger one(45gb) partitioned into 3 equal volumes 
in an external Firewire enclosure(System Profiler sees it as "Model Oxford IDE 
Device LUN 0"), so I can put the 45gb HD into the computer to use as the main 
drive.

I successfully copied all files to the external HD using SuperDuper!, which 
told me it was making the 45gb HD's first partition bootable.  When I restart 
choosing the external FW HD as the starup disk, I get the question mark for 
10-15 secs., but then the computer starts from the internal HD.  

  I noticed that the X on the internal HD's system folder does not appear on 
the copied system folder...does that mean it's not "blessed", so to speak?     
Thinking that the external drive needed a smaller partition to boot from like 
with the beige G3's, I made a 7.85gb partition and tried the whole process 
again,  copying the internal drive/system to the small partition....external 
drive still doesn't boot the computer.  

Any ideas as to what the problem is?   Is it that this particular external FW 
isn't bootable with the B&W?  Do i need a keyboard command to boot from it?   
Will the system (even without the X on the system folder icon) boot the 
computer if I put onto the internal IDE bus?    As I said, SuperDuper!(though just 
a demo of version 2.1) tells me that it completed a bootable copy. 

Thanks so much for any comments you may have.

Saul Broudy
Philadelphia, PA