As for RAID 01 and 10, and RAID 03 and 30, we will focus here on RAID 50, because it is the level most reliable in terms of performance degradation and failure time reconstruction of data discs. RAID 50 is much more expensive than RAID 10, but this performance very similar to this one (excellent performance in reading and writing). His major interest lies in its ability to drive is not reduced by 50%. One can, for example, with 6 disks, retain 80% of the area of these!
As with all RAID composite controller performance is needed, and RAID 50 is often used with duplexing to manage the problem of failures of controllers. Reading performance are excellent, allowing to consider RAID 50 as one of the best RAID composite sequential write, despite a slight weakness in random writes in comparison RAID 10 for example because of his need to reread everything, as still, problems parity calculation.
Despite its slight loss in performance in reading due to the presence of parity information, RAID 50 is also needed as an excellent level for read access, not seeing its performance diminished by the technical choice of RAID controller cards 10 to focus on concurrency.
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