Certkiller .com has implemented a RAID-6 solution. This means that Certkiller .com will be able to recover from ______ in the array.

A.
the failure of one disk

B.
the simultaneous failure of two disks

C.
the simultaneous failure of three disks

D.
the simultaneous failure of four disks

Explanation:
RAID-6 is similar to RAID-5. It implements striping with two independent sets of parity across all disks. This allows for the recovery from up to two simultaneous disk failures and requires an additional disk over RAID-5.
Incorrect Answers:
A: RAID-5 allows for the recovery from a failure of one disk in the array. RAID-6 implements striping with two independent sets of parity across all disks and allows for the recovery from the simultaneous failure of two disks in the array.
C, D: RAID-6 allows for the recovery from the simultaneous failure of only two disk in the array.

References:
Charles J. Brooks, Server+ Certification Exam Cram 2 (Exam SK0-002), QUE Publishing, Indianapolis, 2006, pp. 184-192.
David Groth and Toby Skandier, Network+ Study Guide (4th Edition), Sybex, Alameda CA, 2005, pp. 381-382.