Gary, I have my 60GB drive in my Powerbook partitioned in 3 - 30GB for OS X (applications and documents), 8GB for OS 9 and the rest for "storage" - in which will be my duplicate of my OS X set up on my Sawtooth, once I get 10.2.4 installed on it. Right now, I just have the Documents folder on my Sawtooth duplicated on the Powerbook, as everything else can be reinstalled in the event of disaster.
I'm still working up to the installation of that 120GB drive in the Sawtooth (it always falls off the daily priority list!!) and will partition that into 3 probably - one big partition for X which will be the main working partition, one small one for 9, and another one for storage. May also designate a smallish (relatively speaking) for scratch disk for Photoshop. Probably something like 60-10-40-10GB... I will also reformat my 45GB IBM drive, proabably into 2 - one OS X and one OS 9 partition - with the OS X partition a backup for my OS X on the 120 GB drive. That way, I'll be backed up internally (to two different drives) but if things go really bad with the Sawtooth, the Powerbook will have everything too - which is also nice when I take it to meetings etc. I downloaded some shareware called IMSafe ($15) a few weeks ago, and apart from messing up the first backup (don't ask - user stupidity, not the software) it should help me keep everything synched. CarbonCopyCloner ($5 shareware) will do the heavy lifting when I need to copy an entire bootable volume. Not bad for a grand total of $20!
When you get your new G4, it will no doubt have everything (OS X & 9) all on one unpartitioned drive. First order of business is to wipe, partition and reinstall operating systems. That's what I did with my Powerbook. And then I did it again...wasn't happy with the first set up!
Wait 'til you try Safari and Chimera (now called "Camino" - new release as of today) on a new G4! Zooooom! I do most of my web browsing on my Powerbook right now - it's just too painful by comparison with IE on my old Sawtooth in 10.1.5. Hoping that will improve with the move to Jag, but also contemplating a 1 GHz upgrade card for the old beast. Unfortunately, a similar contemplation of my bank account isn't particularly encouraging! We'll see.