Atto-technology FastStream SC 5700 Manual de usuario descargar pdf (Pagina 69)

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RAID Level 6: striping, two parity blocks distributed among drives

RAID Level 6 increases reliability for mission critical

applications by striping both data and dual parity

across multiple drives, writing data and parity blocks

across all the drives in a RAID group. RAID 6 provides

can tolerate failure of two drives and provides

redundancy during rebuilds.

The ATTO FastStream requires at least four drives to

build a RAID 6 group. Two drives per RAID group are

used for parity protection and are unavailable for data.

Data 11

Data 10

Parity 10-12Parity 10-12

Stripe 2

Stripe 3

Stripe 1

Data 7

Parity 4-6

Parity 1-3

Parity 7-9

Parity 4-6

Data 3

Parity 7-9

Data 6

Data 2

Data 9

Data 5

Data 1

Disk 1 Disk 2 Disk 3 Disk 4

Stripe 4

Data 12

Data 8

Data 4

Parity 1-3

Disk 5

1 2 ... 64 65 66 67 68 69 70 71 72 73

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Atto-technology FastStream SC 5700 Manual de usuario Pagina 69