1) I'd keep the OS/Apps drive on the mobo SATA port. You want the speed it offers. Those ports are likely SATAII (running at 3.0Gbps)
http://kb.sandisk.com/app/answers/detail/a_id/8142 whereas if you stick a SATA/RAID card into a PCI slot, then PCI will be the slow link in the chain. PCI's bandwith can be considered 133MBs (1Gbps), much slower than native, common, SATA II. It's highly unlikely the MOBO has SATA III @ 6.0Gbps.
2) RAID 0 is frowned upon as if one drive has an issue you lose all of it, though, if you're only doing OS/APPS, those items do not change often such that an image backup (Win7 Image backup works well) could be sufficient. Stick the image backups onto your 2TB data drive, once a week backup or every other week is perhaps good enough. Daily backups for data from your 2TB to "something". Otherwise, consider the 128GB SSD listed above, if you wish to spend the coin. As an aside, I installed a fresh Win7x64 onto an 4GB, Intel i5 laptop. Power button to "usable" was ~42/45 seconds - with a mechanical hard drive. Cloned over to an SSD... 15 seconds. [EDIT: If your mobo SATA does not do RAID, I would NOT use a paddle card RAID as the PCI slowness would be undesirable - get a larger single SSD and hang it off of a MOBO SATA port. Additionally, you might not be able to put a boot partition onto a paddle card RAID partition.]
If it were my setup...
128GB SSD for OS & APPS
2TB mechanical for Page File, Temps, Data.
I'd partition the 2TB into perhaps two partitions. The first perhaps 20GB and the second the remaining capacity. Onto the first partition, which I'd "rename" as drive "T" or "P" (move it up the alphabet, out of the way), I'd put the page file - removing any page file on the SSD/C-partition. I'd also redirect temporary files for the OS, User, web browsers to this partition. Reasons: With the small partition at the outside (first partition) of the 2TB drive, it'd be as fast as that 2TB could give. Second, SSD's don't like "change". They have a finite write life, whereas a mechanical doesn't mind. Now, I do not know the speed diff between having those items on the SSD vs. mechanical, but my guess is that it'd be marginal. FWIW, this is my current setup for my desktop.
While on the topics of access speeds for files, these two utilities are a consideration (both directly compete w/ MS utilities - Disk Cleanup & Defragment but go beyond what MS tends):
- cCleaner (crap cleaner) - delete junk / temp files before defragmenting / optimizing [go into the "builds" section of piriform.com and download the clean version without the added junk toolbar]
- MyDefrag (
www.MyDefrag.com) - prioritizes files / reorganizes files for speedy retrieval (via mechanical drive). Author states it is as safe as the MS Defrag as his program simply tells MS Defrag what to put where. MS Defrag simply defrag's and his goes a step further to optimize. It also has provision for SSD's.
I hope y'all accept what I type as positive and not hear me as preaching - no one can know it all in the tech realm - this is where I spend my time so it's daily task for me.