Upgrading my existing RAID to higher capacity drives

Hi all,
I currently have two 500GB drives as a RAID 1 (through Disk Utility) in my mid-2007 Mac Pro 8-core, and I'm starting to get a little tight on space. I'd like to up the capacity by replacing the existing 500GB drives with at least 1TB drives, but with all four drive bays currently filled, I'm not sure how to go about this... but after reading through some threads here, I might have plan.
Would this be the best course of action?
1) Remove one of the 500GB RAID drives.
2) Delete the RAID set in Disk Utility.
3) Install new 1TB+ drive
4) Clone the remaining 500GB RAID drive to the new 1TB+ one.
5) Remove remaining 500GB RAID drive, install new matching 1TB+ drive
6) Create new RAID set in Disk Utility
It seems a little roundabout, but sounds like it would work. Any thoughts, or better ways of going about doing this?
Thanks,
Jeff

There are three obscure sources for the documentation. Bear with me. I have tried to focus narrowly on helpful documents that I actually used to do this, not baffle you with B.S.:
1) Man pages for the Terminal diskutil command:
try this link or use the procedure below:
Mac OS X Reference Library: diskutil(8) Manual page
.OR.
Start Terminal.
type man diskutil
The problem with this document alone is there is no background information, no discussion of what you are actually doing, and no examples.
You will want to look at the options for the diskutil createRAID.
Once this drive is created and populated with your data, you can use diskutil to rebuild onto the second drive, but frankly it is easier and more confidence-inspiring to use Disk Utility.
2) Server Admin Command-Line Administration Manuals:
Introduction to Command-Line Administration : Version 10.6 Snow Leopard
This is a broad introduction to using the command-line. Many parts apply perfectly well to Mac OS X non-server. It lacks the specific diskutil chapter featured in the previous version:
Command-Line Administration :For Version 10.5 Leopard
see chapter 7, "Working with Disks and Volumes" for specific examples. I printed chapter 7 out to use as a reference. As far as I know, this applies perfectly well in 10.6. This is also a little terse, and short on examples.
3) afp548 (a Mac OS X Server discussion/help site) articles discussing RAID2 ( introduced at 10.4 Tiger):
afp548: Apple RAID2 In Depth
and a slightly older article on Rebuilding a RAID Mirror with diskutil command-line:
afp548: How to Build a RAID Mirror Without a Re-Format
The examples in the second article show only the older Apple Partition Table (rather than GUID) partition maps, but the fundamental info is still good.
Message was edited by: Grant Bennet-Alder

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