LaCie FIREWIRE 800/400 Manual do Utilizador descarregar pdf (Página 20)

LaCie Biggest Quadra

User Manual

page 19

Understanding RAID

3.4. RAID 5 + Hot Spare

is level is the same as RAID 5, but one disk is des-

ignated as a “Hot Spare,” which means that in the event of

a disk failure, the “Hot Spare” disk would automatically be

activated to replace the failed disk.

e storage capacity of a RAID 5+ Hot Spare array fol-

lows the same logic as that of RAID 5, but with the dif-

ference being that there is one less disk in the array. So, for

instance, if there was a RAID 5+ Hot Spare array with three

drives of varying capacities of 40GB, 50GB and 60GB, and

one disk designated as the hot spare with a capacity of 70GB,

the total capacity of the array would be 80GB [2 (3 disks – 1

disk) x 40 = 80].

This diagram represents a

RAID 5 array, consisting of

four disks, which are

connected to the Controller.

Parity blocks are represented

by the letter P.

CONTROLLER

PEF

PCD

PAB

PGH

Fig. 3.4.

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