RAID is one of the few areas were myself and Bert disagree. A few points and my argument:
1. Never use RAID 0. If one drive fails you loose the entire array and all data on it.
2. RAID 1 is great for the operating system drive. But little else.
I prefer RAID 5 or 6 and highly recommend it for AC installs. In every environment you will ever manage, that environment will fall into one or two categories: Heavy Reading | Heavy Writing. Amazing Charts is a Heavy Reader. With RAID 5/6 for every drive you add it cuts down read time. That's why my RAID 5 arrays always have a minimum of 4 drives. And, with RAID 5 you can lose one drive and be OK with RAID 6 it is two drives.
The reason I do not recommend RAID 10 is because of sheer cost. That cost comes in two forms: first is the cost of that many more drives. Second, that many more drives also take up more drive bays in your server so limit expansion ability. Remember, for RAID 10, *half* of the drives are for nothing more than redundancy.
JamesNT
.png "ACUF Donor I")
