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100 Sun StorageTek SAS RAID HBA Installation Guide • March 2010

RAID 6 Arrays

A RAID 6 array—also referred to as dual drive failure protection—is similar to a RAID

5 array because it uses data striping and parity data to provide redundancy.

However, RAID 6 arrays include two independent sets of parity data instead of one.

Both sets of parity data are striped separately across all disk drives in the array.

RAID 6 arrays provide extra protection for your data because they can recover from

two simultaneous disk drive failures. However, the extra parity calculation slows

performance (compared to RAID 5 arrays).

RAID 6 arrays must be built from at least four disk drives. Maximum stripe size

depends on the number of disk drives in the array.

FIGURE F-8 RAID 6 Arrays

1 2 ... 109 110 111 112 113 114 115 116 117 118 119 ... 147 148

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