This might doesn't help you, but If I remember right I did this when I copy whole disk with OS9 and OSX to bigger disk:
- I connected my Mac to another Mac with firewire-cable.
- Start up with T-button down, so another Mac see my computer as harddrive.
- With Disk Utility I made image from whole disk (not just partition).
- I Change new harddrive.
- Write back that image.
- After that I resize partition with iPartition (actually I even add one partition, that I can have OS9 and two OSX versions)
Some versions of Disk Utility has size limits to do that, If I remember right OS X 10.3 has 32 GB limit to image, but at least OS X 10.5 80 GB image worked.
I just wondering has anybody try Disk Copy for OS9 to do that, is there size limits?