The Certkiller Administrator wants to know from the trainee which of the following RAID implementations requires at least four drives to implement?

A.
RAID 1+0

B.
RAID 5+3

C.
RAID 5

D.
RAID 3

Explanation:
Both the RAID implementations of RAID 1+0 and RAID 0+1 both require at least four drives to implement both require at least four drives to implement.
Incorrect Answers:
B: The RAID 5+3 implementations is a combination of RAID 0 and RAID 3 and is effectively a configuration of striped array (RAID 0) whose segments are essentially RAID 3 arrays.
C: RAID 5 is used to distributes its parity blocks among its independent data disks.
D: The RAID 3 specification is designed to use parallel transfers similar to RAID 2, along with byte-level parity striping.
Reference:
Charles J. Brooks, Server+ Certification Exam Cram 2 (Exam SK0-002), QUE Publishing, Indianapolis, 2006, pp. 189