about to set up RAID...few questions....

so i built my rig this past week and i didnt set up raid when installing the OS because i wanted to get the system up and running well first on one HDD....since its running great now i am ready to RAID.......

i have four WD6400AAKS drives and i was thinking of RAID 10 so that i have about 1.2TB of storage and little chance of losing all data if there was a drive failure...i was thinking today that maybe if its possible i would just keave the OS on the 640 HDD that its currently on and then set up a RAID5 with the other 3 drives just to store all of my Music, Photos, Videos, ETC on so that they are safe and if the OS drive dies who cares just get a new one and re install windows which is not a huge deal at least my important stuff will be safe....Can this be done? any disadvantages that i am overlooking??? ASUS M4N79 Deluxe MOBO.....

OPINIONS/ASSISTANCE PLEASE?

 

RAID 10 will give you better throughput than RAID 5, but if your top concern is storage capacity, then it doesn't really matter. You might want to make a BartPE boot disc or USB key in case your main drive dies and you need to access the RAID in an emergency.