The Certkiller administrator is in the process of configuring a new RAID array and wants to know which of the RAID levels uses independent data disk arrays with two distributed parity blocks?

A.
RAID 2

B.
RAID 6

C.
RAID 3

D.
RAID 5

Explanation:
The RAID 6 implementation uses independent data disk arrays with two distributed parity blocks and it then stripes blocks of data and parity across an array of drives similar to RAID 5 where two sets of parity information for each parcel of data, requiring two drives to do so.
Incorrect Answers:
A: The RAID 2 specification employs multiple disks for error detection and correction thus it reserves large portions of the array for non-data-storage overhead, depending on the error detection and correction algorithms used in the implementation.
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