Adaptec SAS RAID Controllers Guide d'installation télécharger pdf (Page 111)

Appendix F Selecting the Best RAID Level 97

FIGURE F-5 RAID 5 Arrays

RAID 5EE Arrays

A RAID 5EE array—also referred to as a hot-spare—is similar to a RAID 5 array

except that it includes a distributed spare drive and must be built from a minimum of

four disk drives.

Unlike a hot-spare, a distributed spare is striped evenly across the disk drives with

the stored data and parity data, and can’t be shared with other logical disk drives. A

distributed spare improves the speed at which the array is rebuilt following a disk

drive failure.

A RAID 5EE array protects your data and increases read and write speeds. However,

capacity is reduced by two disk drives’ worth of space, which is for parity data and

spare data.

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Adaptec SAS RAID Controllers Guide d'installation Page 111