[Ben Brodbeck] “My only question left (forgive my ignorance) is what does the RAID 0 config do for me. What is the advantage? “
Speed, speed, speed! RAID 0 configures the drives as a single volume in which data is striped across all three drives simultaneously, greatly increasing the read/write data transfer speeds of the volume.
The downside of RAID 0 is that if one of your drives fails, all data will be lost. A good rule of thumb is to not store anything on a RAID 0 volume without first backing it up on something else.
Other RAID levels like RAID 1 and RAID 5 offer redundancy so that if a drive fails, data may be recovered.
RAID 1 is also called mirroring, and simply involves having one drive become an exact duplicate of the other. There’s no speed advantage to doing this, and in fact performance may suffer slightly. Since a drive is duplicated, RAID 1 requires an even number of drives. Storage space is half the total of all drives.
RAID 5 uses 3 or more drives, and distributes parity information across all of the drives in the array so that if one drive fails, data can be recovered by replacing the drive and rebuilding the RAID. Due to the increased processing overhead required for parity data calculations, RAID 5 is typically performed in hardware by a RAID controller card. RAID 5 offers both speed and redundancy. Total storage space is slightly less than the total of all drives in a RAID 5 volume, as some space is dedicated to storing parity information.
In short:
RAID 0 = speed, no redundancy
RAID 1 = redundancy, no speed advantage
RAID 5 = speed plus redundancy, hardware controller usually required
For best results, all drives in a RAID set should be of equal size.