What's the Best Photoshop CS5 Scratch Disk Setup for New MacPro 12 Core?

Hello all...
I'm awaiting delivery of a new MacPro 12 Core with 16GB of RAM and a 512GB SSD drive (Bay1) + 2TB (Bay2) + 2TB (Bay3). Normally I would partition about 60GB of one of the 2TB drives to make an exclusive scratch disk for Photoshop to ensure optimum performance.... with the new spec MacPro and especially the new 512GB SSD, do I still need to do this..?
Any suggestions of comments most welcome... as I want to try to get my new machine set up as best I can before I start copying over my existing data and filling hard drives etc. Photoshop CS5 and Quark Express 8 are my two core apps that I use daily.
Regards,
Anthony MacCarthy
Irish MacUser and MacAddict

ScarCrow 28 wrote:
…Well yes, technically you've got me on that I will admit.  I'll try to rephrase to be a bit more accurate. The best scratch disk is one you don't need to rely on performance wise, by having enough RAM to handle the data performance needy tasks that would otherwise be sent to the scratch disk, when enough RAM can't be accessed by Photoshop…
…Hows that?
Still wrong, alas.  
The scratch disk is used always.
See this very short (two-message) thread:
http://forums.adobe.com/message/2847996#2847996
Excerpt:
[Chris Cox writes:]
…Photoshop needs to allocate scratch space for data, in case it needs to
write that data to disk later -- otherwise you would randomly fail with
"out of scratch space" in the MIDDLE of an operation…
Furthermore, Photoshop sets the size of the scratch disk ahead of time—the instant you open an image file or create a new document—basing it on assumptions the application makes taking into account your usual, past workflow practices, your settings and the pixel dimensions of the document.
Bottom line:  the scratch disk always plays a part.
Do a forum search filtering the options with Chris Cox in the "Who" box, "scratch" as key word, and Photoshop Macintosh as the forum.  You'll find some enlightening reading.  Examples:
http://forums.adobe.com/search.jspa?q=scratch&resultTypes=MESSAGE&resultTypes=COMMUNITY&pe opleEnabled=true&dateRange=all&communityID=3341&username=Chris+Cox&numResults=15&rankBy=10 001
I'm not just insisting on arguing; I honestly want you and others to have a better Photoshop experience.  Really. 
Wo Tai Lao Le
我太老了

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