AMCC 3WARE 9590SE Guia do Utilizador descarregar pdf (Página 20)

Chapter 1. Introduction to the 3ware Command Line Interface

14 3ware Serial ATA RAID Controller User Guide

Figure 4. RAID 6 Configuration Example

RAID 10

RAID 10 is a combination of striped and mirrored arrays for fault tolerance

and high performance.

When drives are configured as a striped mirrored array, the disks are

configured using both RAID 0 and RAID 1 techniques, thus the name RAID

10 (see Figure 5). A minimum of four drives are required to use this

technique. The first two drives are mirrored as a fault tolerant array using

RAID 1. The third and fourth drives are mirrored as a second fault tolerant

array using RAID 1. The two mirrored arrays are then grouped as a striped

RAID 0 array using a two tier structure. Higher data transfer rates are

achieved by leveraging TwinStor and striping the arrays.

In addition, RAID 10 arrays offer a higher degree of fault tolerance than

RAID 1 and RAID 5, since the array can sustain multiple drive failures

without data loss. For example, in a twelve-drive RAID 10 array, up to six

drives can fail (half of each mirrored pair) and the array will continue to

function. Please note that if both halves of a mirrored pair in the RAID 10

array fail, then all of the data will be lost.

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AMCC 3WARE 9590SE Guia do Utilizador Página 20