hmm, it might will be late night toonightm, as right after that I am going to University, and after that I have laser eye surgery (F***** Busy Day). but I will try utmost to write as much as I can. as I might not be allowed to use PC's right after my surgery for at least 24 hours. if I could get time during my boring lecture, I'll start typing as I'll be with my laptop anyway in class.
but meanwhile i'll just write about RAID 0 - its particularly, striped disk array without fault tolerence.this provides data stripping (spreading each block of file over multiple disk drives, 1/2/3/4 as you have got disk in arrays, e.g you have 4 disks, then your 1 file of 100KB will be divided into 4 X 25kb and stored on each.) this improves performance, but does not provide fault tolerence, so in case of failure of one drive, all the data is lost. remember, i have said earlier, that RAID is customised for one purpose (either speed or reliability), but there are combinations (like RAID 0+1).
hope it helped.