Hard Drive Optimization - app HD

Due to some wierd things going on with pro apps after installing SL - I am doing a fresh Install of SL and reinstalling all the apps. I am also taking this time to add a couple new HD's to the system.
Has anyone here installed their apps (pro apps) on a different drive than the startup disc and noticed any performance gain? Or waste of time?

Hi Japamac,
The most accepted use of hard drives for performance is to have the OS and all applications on one drive.
Some apps do not behave well when on a drive separate from the OS.
On another drive, keep all user files (the entire Home directory).
A third drive is then dedicated to be used as scratch for the temporary files of the pro apps.
I have just connected a Vertex EX 60GB SSD in the lower optical bay of my 2009 Mac Pro, and I have done a clean install of the Mac OS and all my applications. This has taken up less than 25GB of space, and so there is ample left for me to add other applications such as Photoshop CS5 when it is eventually released. At the moment I have installed Photoshop Elements 8.
The VelociRaptor 300GB HDD, which I was using before, has been erased, and I have used it with 3 other VR300s to set up a 4 drive striped RAID 0. I used Disk Utility for this purpose. So I now have a 128GB volume (Speedy) for use as a scratch drive, and a 1.07TB volume (Data).
Before I erased the first VR300 I cloned a copy of it to my original Mac (WD) 640GB HDD in an ONNTO external enclosure, and I will keep this as a back up boot drive. Also I have everything backed up via Time Machine on a My Book Studio Edition II 2TB external drive.
So, excluding the external drives, I now have 3 volumes - the Vertex EX boot, the Speedy scratch, and the Data.
The Vertex EX is in a "virgin" state at the moment, with the clean install of the OS and applications, and is running like a dream - very, very fast!
As you recommend, I want to leave just the OS and applications on the Vertex EX.
(1) Can I use Migration Assistant to transfer everything else (the user files etc) from the Vertex EX to the 4 drive RAID 0, using the "From a Time Machine backup or other disk" method?
(2) Am I correct in assuming that these should be transferred to the "Data" volume?
(3) Is the "Speedy" scratch volume left blank, and is the OS clever enough to use it for temporary files of the "pro apps", as and when beneficial?
(4) Or do I need to do anything else to "dedicate" it for that purpose?
These might seem silly questions to an experienced user, but this is a completely new set up for me.
Now for a very daft question:
When I erased the Vertex EX, I named it Vertex EX.
However, when I partitioned it (1 partition), I omitted to name the volume. So I now have a volume named "Untitled 1" which I want to re-name "Vertex EX Boot".
I thought it would be simple to do this, but I can't find a way to achieve this in Disk Utility, because, when I select "Untitled 1", none of the 4 options (First Aid, Erase, RAID, Restore) have the facility to do this. I don't want to use any of those options anyway, but I had hoped that I could have changed the name without actually progressing any further.
(5) Is there a simple way for me to rename that volume? I expect there is a way using Terminal, but that is a total unknown to me!
Regards,
Biltan

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Hard Drive Optimization - app HD

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