I Have A New Lacie Rugged 320 GB - Do I Partition The Drive?

Question

I have a new Lacie Rugged 320GB (along with my other two Lacie external hard drives), and have
a few questions about setting this one up for what I want to do.
1. I want make a partition to save a complete eMac Hard Drive on the new
Lacie Rugged 320 for a master back-up (Tiger 10.4.11 Back-Up) This will be Mac OS Extended
2. I want to make a second partition for a future Macbook Pro Hard Drive
on the new LaCie rugged 320GB Drive (OS10.6 or later Back-Up) This will be Mac OS Extended
3. I want to make a "free space" partition for a master iTune Folder Back-Up
on the Lacie Rugged 320 GB Drive .... and to provide additional "free space"
for future important file back-ups. This will be Mac OS Extended
4. I want to add a fourth partition for a possible windows back-up. Not sure what this should be
formatted in.
Is it reasonable to section this drive off into four partitions? I would like to have a master back-up, that I could use to reboot an eMac in an emergency .... or to first use when loading my new Macbook Pro.
Secondly, I would like to back-up the Macbook Pro, so I will have a second start up drive
it it should ever be needed.
Then I would like to have an "open free space" partition where I could put immediate stuff
on and off the drive for back-up purposes (iTunes library folder, etc.).
Last, I THINK I should have a separate partition for a windows system back-up that will
be running on the Macbook Pro ... although I'm not sure which Windows/PC formatting would be
best for doing this. Or if this would even make good sense?
Any suggestions on partitoning the new Lacie Rugged 320GB will be appreciated.
Thanks

Answer 1

Thanks for clarifying, although I find someone coming here for advice and posting Give it a break, a bit snarky.
That said, here's my standard advice WRT upgrading:
Get a bootable, external HD (preferably FireWire, since it's 40-50% faster than USB 2 and designed for data transfers), make a bootable backup/clone before updating/upgrading, and ensure that it's bootable and works like the original. That allows you to revert to the previous good state without having to reinstall or reset anything. See these for details:
http://docs.info.apple.com/article.html?artnum=106941
http://www.macmaps.com/upgradefaq.html
http://www.macmaps.com/backup.html
http://www.thexlab.com/faqs/installswupdates.html
http://www.thexlab.com/faqs/backuprecovery.html