Areca ARC-1882LP User Manual download pdf (Page 193)

193

APPENDIX

RAID 5

RAID 5 is sometimes called striping with parity at byte level. In

RAID 5, the parity information is written to all of the drives in the

controllers rather than being concentrated on a dedicated parity

disk. If one drive in the system fails, the parity information can

be used to reconstruct the data from that drive. All drives in the

array system can be used for seek operations at the same time,

greatly increasing the performance of the RAID system. This

relieves the write bottleneck that characterizes RAID 4, and is the

primary reason that RAID 5 is more often implemented in RAID

arrays.

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Areca ARC-1882LP User Manual Page 193