Andy is the new network administrator. He needs to make a decision on which RAID level is best to implement for his company. If Andy needs to ensure that there is no single point of failure, which RAID level should he implement?
A.
RAID 3
B.
RAID 4
C.
RAID 2
D.
RAID 5
Explanation:
With RAID level 5 data are written in disk sector units to all drives.
Parity is written to all drives also, which ensures there is no single point of
failure.
The correct answer should be any RAID configuration, except for RAID 0.
“RAID levels greater than RAID 0 provide protection against whole disk failure.” source: en.wikipedia.org/wiki/RAID
If a disk using RAID 1 fails, you still have the other. If the parity disk fails in RAID 3, you still have the main disks. If a main disk fails in RAID 3, you can recreate it with the parity disk.