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Raid description help

thecoolnessrune

thecoolnessrune

Diamond Member
I know what Raid is but what do the different types mean Raid 0,1,5,0+1,JBOD,10,30,50??? What do all these different types mean????
 
RAID 0 = striping, theoretically increases performance by splitting a file between two or more drives which each simultaneously read/write instead of one drive doing all the work (not recommended for use on a personal desktop). If one drive fails, however, all info on both drives is lost. Performance gains are usually very slight, if any, on a personal desktop (see Anandtech's article on RAID 0).

RAID 1 = Mirroring/duplexing, which creates an identical copy of one drive onto another, strictly used for fault tolerance, not a true backup solution.

RAID 5 = striping with parity, requires at least 3 drives, two which stripe, and the third stores a parity bit for error detection (which two drives stripe and which stores parity is different for each file), but can still suffer the same failure issues as a RAID 0 setup.

RAID 0+1 = striping with mirroring, requires 4 drives, basically gives fault tolerance to a RAID 0 setup, but requires a second set of drives for mirroring. Very expensive due to the number of disks required, but theoretically gives the best of both worlds.

Does this help?
 
I think what the JBOD does is to combine two or more drives together to make it work like one.
For example, you will see 320GB drive in Windows if you JBOD a 60GB, 100GB and a 160GB together.
 
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