My recommendation - Get an SSD. If the data base is less than 8 gigs and you have 16 gigs of ram, you could go for a ram disk. when you power on it will come up with ramdrive and database in ramdrive - Slows Boot time. Ram disk about 10 x faster than a SSD, SSD about 20> 50 Times faster than a HDD.
Ram Drive of Choice (free up to a 4 gig Ramdisk), >4 gig need to pay $19 (went up was 15):
http://memory.dataram.com/products-and-services/software/ramdisk
On raid 0
.. Biggest benifit is in sequencial performance Which is the LEAST important parameter for a OS + Program drive. Great for Reading LARGE file structures ie vedio encoding or doing a lot of photo editing with 10 Meg jpeg/bitmaps.
.. Does Nothing for access time and Very Little for small 4 K random performance.
1) Reason for NO improvement in random 4 K is primarilly the strip size which is normally 64k or 128 K - each file is ONLY on one drive, not split - Hense NO performance gian.
2) Access time is a function of the indivdual drive, NOT how it is connected.
There is a way to improve access time using raid 0 - You Short Stroke the drive. ie a Pair of 1 TB drives and you create a Raid0 array ONLY using 20 -> 30 Percent of the drive And LEAVE the remaing disk space as UNUSED. This improves performance under Raid0 as All the data is limited to the Outer 20 -> 30 % of the platter where angular Velocity is Highest.