If you have not seen Harm Millaard's To RAID, or Not to RAID article, that would be where I would start.
Much will depend on how your RAID is managed, whether it's hardware RAID (and whether it's from the MoBo, or from a stand-alone RAID controller card), or via software.
In a perfect world, one would have at leas a 3x HDD setup:
C:\ - OS, programs, and possibly the Page File (non-RAID, unless there IS redundancy)
D:\ RAID 0, or other, like 30, or 50, depending on the number of physical HDD's, and some can be set up with redundancy too - for all media files
E:\ - Projects and Scratch Disks (possibly a separate RAID, ideally with redundancy, or non-RAID array)
If I had to choose between a single RAID array, or separate HDD's (non-RAID), I would choose the latter to spread the I/O over multiple HDD's.
As for the Page File in XP, you will do that from Control Panel>System>Advanced>Performance/Settings>Advanced/Virtual Memory/Change
PS - my workstation will be:
C:\ - OS and programs (possibly Page File, but will test performance to determine the best location)
D:\ - RAID 30 (three physical HDD's - same for E:\ and F:\ with a dedicated, separate RAID controller card) - Video Media Files
E:\ - RAID 30 - Export
F:\ - RAID 30 - Audio Media Files
G:\ - Projects and Scratch Disks
H:\ - Storage of Assets
Yes I saw that article before and it was that which left me perplexed
Anyway I disconnected my raid (it was Raid1) so now I have three drives.
C: 130g HD OS, pagefile & PE9 Program & Media Cache
E: 500g HD Media
G: 130g HD Project & all other PE files except the media cache.
It now flies along during editing, zipping up and down a AVCHD 1920x1080i 1hr 25 min project as quick as you can move the mouse. It takes about 1 second to preview/play a clip after I have selected it from a different part of the movie.
The first and last frames of each clip stay there when I zip up and down the timeline wheras previously I had to wait ages until they reloaded if I went to the end of the long timeline.
This is much much faster than when I had it all on one raid1 drive.
I can't complain about AVCHD speed so if anyone else does, 3 drives is the answer.
It took 20 secs to load PE9 and 45 secs to load the project after PE9 was running, (up to 3 minutes before).
I have Win XP, 2.4 core duo,.800mhz board with 2mb ram and 3 cheap Sata hard disks,
Having the PE9 program on the same disk as the pagefile should also be OK because I would think the bulk of the app code in use at any time would be in memory and only the prog dll files accessed when you want to change a setting or rarely used effect. That is the way I'd design PE9 if I did it.
I though the pagefile is only there because you haven't enough memory to do everything in memeory.
What is the purpose of the media cache. I can never see anthing in it while I am editing. Is it do to with writing the DVD which I havent got arounf to doing yet?