Mac Pro RAID configuration advice needed to address photography workflow

I am a semi-professional photographer and I am moving off a Windows machine and over to a Mac Pro.
I am waiting for the new Mac Pro to arrive and have purchased (4) 500GB SATA drives to replace the 250GB drive the system will arrive with.
I am considering setting up drive #1 as a stand alone boot drive. The second and third drives would be set up in a RAID 0 config and the 4th drive set up as a RAID 1 drive which would mirror the content on my RAID 0 set of drives to automatically backup the content on drives 2 & 3.
I think it would be beneficial if I describe my image processing workflow briefly so that you can understand why I am considering this RAID configuration (I've never set up a RAID configuration in the past so this is all new to me).
Image Processing Workflow
It isn't uncommon for me to return from a photo shoot with an 8GB Compact Flash card full (approx 750 8mb RAW files).
1) I plan on uploading my card to the boot drive (#1) where I would hold them temporarily.
2) I would sort thru the images and trash 80% immediately in most cases.
3) Next I would open up the "keepers" and do the initial post processing in Adobe RAW and save them to drives 2 & 3 (the RAID 0 set).
4) Further post processing (the heavy lifting and the most taxing operations in Photoshop and associated filters) would take place as I access these files from the RAID 0 set of drives.
5) All of my files would be mirrored to drive 4 as I work them. Once post-processing is complete I would copy the files from drive #4 (RAID 1)to an additional external 500GB drive for archiving purposes and then eventually delete the files from drive #1 and the RAID 0 set.
6) Once drive #4 (and the external drive) is nearly filled I would pull both and archive them and replace both with fresh drives.
Is there anything wrong with taking this approach? Can a single drive be set up in a RAID 1 configuration to mirror a set of drives in a RAID 0 configuration?
Is there anything else I should be considering?
Thanks for any assistance you guys can provide! I appreciate it!!

For the purposes of 500GB drives in RAID, I would go with WD RE2. they format to 465GB and performance falls off @ 65% and beyond anyway.
I even "short-stroke" drives to just 60% and then stay within 1/3 full - if I want to insure the maximum I/O.
Memory: 4GB is pretty much minimum but using more than 8GB isn't efficient. Ideal: 4 x 2GB.
Shame that the Hitachi 1TB drive costs over $399 for now, fast and might be better than 10K Raptor. There are also 750GB drives for $249, but the RE2 isn't quite ready to ship.
Never want to get into using 75% or more usually, though large (8-20 drives) RAIDs can hold sustained I/O for video editing and multiple streams.
One 750GB or 1TB (930GB formatted, 800GB "usable") might make sense.
How about a SATA drive case w/ hot-swap. Think of 1TB "floppy" if you will :-)) Unlimited archiving of projects.
All you want is an inexpensive eSATA 1x 2-channel PM controller and any cases. Two drives that you can use drive trays as needed.
there are also 'spare' drive sleds if you want to have the option of popping a drive out, and use it internally. $29 each or $49 a pair.
http://www.xlr8yourmac.com - link to TransIntl site
Vista 64-bit can or does work quite well now on Mac Pro... if you ever get into a jam and just need to. SP1 by end of the year will even have more support for UEFI 2.0 (Apple uses Intel EFI 1.1).

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    Not being funny!
    But you're post does sound funny!
    At first i though you were asking a Question <Updating to Mac Pro - do I still need a soundcard? >
    Awaiting to answer, it later reads
    <Do I still need my old MOTU 2408 (Motu will sell me a PCI-424x adaptor to fit the Mac Pro) when I can lightpipe straight into the Mac Pro optical ins from the optical out of the Focusrite?>
    Then you gave you're answer
    Then i realy seems to now conclude, are you talking to yourself, Eg. asking a Question, then Quickly answer ing it.
    Cool-Game!
    Fr.BlayZay.

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    Just as an FYI, upsate to 14.3.7... now to your problem:
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    Message was edited by: Max Shafiq

    I thought my using a RAID 1 mirror if one of the drives failed then the other would continue as if nothing happened
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    https://discussions.apple.com/thread/4208248?tstart=0
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