The Certkiller Administrator wants to know from the trainee which of the following RAID implementations requires a minimum of three drives to operate?
A.
RAID 3
B.
RAID 0+1
C.
RAID 1+0
D.
RAID 5
Explanation:
RAID 5 is used to distributes its parity blocks among its independent data disks.
Incorrect Answers:
A: The RAID 3 specification is designed to use parallel transfers similar to RAID 2, along with byte-level parity striping.
B: The RAID 0+1 combination of implementations uses RAID 0 strictly because of itshigh performance and RAID 1 for its high fault tolerance.
C: The RAID 1+0 combination applies RAID 1 first, after splitting the eight drives into four sets of two drives each.
Reference:
Charles J. Brooks, Server+ Certification Exam Cram 2 (Exam SK0-002), QUE Publishing, Indianapolis, 2006, pp. 188
RAID-3 requires at least three disks (two for data and one for parity) and at least a medium level controller.
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