The Certkiller Administrator wants to know from the trainee which of the following RAID implementations can handle up to half the drives can fail before everything is lost?

A.
RAID 1+0

B.
RAID 5+3

C.
RAID 3

D.
RAID 5

Explanation:
The RAID 1+0 combination applies RAID 1 first, after splitting the eight drives into four sets of two drives each this combination has better fault tolerance.
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: The RAID 3 specification is designed to use parallel transfers similar to RAID 2, along with byte-level parity striping.
D: RAID 5 is used to distributes its parity blocks among its independent data disks.
Reference:
Charles J. Brooks, Server+ Certification Exam Cram 2 (Exam SK0-002), QUE Publishing, Indianapolis, 2006, pp. 189