MrElussive said:
Hahaha. How does a RAID 5 setup work? My father just built a computer and he is running dual 250GB drives in RAID 0 (striped) mode. I know RAID 0 is two hard drives working together and RAID 1 is two hard drives mirroring each other, but what's RAID 5???
RAID = Redundant Array of Inexpensive Drives
PARITY= A mathmatical calculation that is used to encode characteristics of data, sort of like a signature.
RAID 0 - Data striped across multiple drives, but there is no "fault tolerance". That is, if ANY drive fails in a RAID 0 config, you loose all the data. So the R in RAID 0 is really not true, it's really AID 0, there is no redundancy. RAID 0 is primarily a performance booster.
RAID 1 - Disk Mirroring - 2 drives with the same data written to both. If 1 drive fails, you continue to run. This is the cheapest redundancy available, but not the fastest.
RAID 3 - Multiple drives, data striped across drives, with ONE drive dedicated to parity. This is the most reliable and fastest RAID technique, also the most expensive since you need a drive for parity.
RAID 5 - Multiple drives, data striped across all drives, with parity stored with the data. Cheaper than RAID 3, but slower since both data and parity must be written to the drives.
There are are also RAID 4 and RAID 6 configs, but are not as common. There is no RAID 2, it was replaced by RAID 3.