Raid 0 [Questions (Size , Brand diff ) ]

Seagate Barracuda 7200.12(my current) + Western Digital Caviar Blue(planing to buy this for raid 0(click name for LInks)


2) will there b a problem if i use 2 HD from diff company for Raid ?

3) if i use HD 1 250 GB Seg and HD 2 WB 350GB (diff size) will there b any problem other than when Raided size will b only 250GB ?


note : i do have a 500GB HD just for important files , software, etc back up