Rocstor BIGROC 1S Instrukcja Użytkownika Pobierz pdf (Strona 20)

RAID 5

RAID 5 uses block-level striping with parity data distributed across all member disks. It is also

called Parity RAID. Every time a block is written to a disk in a RAID 5 disk array, a parity block is

generated within the same stripe. A block is composed of many consecutive sectors on a disk.

A series of blocks (a block from each of the disks in an array) is collectively called a "stripe." The

parity information inside the parity block is not the identical copy of the source data. It is

generated via parity calculation. RAID 5 mode provides decent data protection and fault

tolerance. The speed of operation is average in comparison to other RAID modes.

Three or four disks are supported by RAID 5. The storage capacity will become all disks

in total, minus 1. The capacity is limited to the size of the smallest disks.

If one of the disks fails, the data can be reconstructed through parity calculation once

the broken disk is replaced with a new one.

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