Re: raid 0
1)RAID 0 deals with striping. It splits data up between two hard drives. No mirroring is present (no redundancy). It's like one hard drive instead of two (although physically, you are using two hard drives).
2)Faster data transfer rates. Disadvantages are....don't know. Extra cost? If one drive fails, everything is dead. Must get two exact drives to work (better compatibility).
3)This is totally optional. Hardcore users like to do it. I'm looking into doing it next.
4)Not difficult. I never set one up before but I have a general idea how to do it. Lots of online tutorials on how to set it up.
*Fact: Microsoft Window's Blue Screen of Death vs Computerforums.org's White Screen of Death. Which is worse?