A server administrator was asked to build a storage array with the highest possible capacity. Which of the following RAID levels should the administrator choose?

The correct answer is A. RAID 0. RAID 0 (striping) uses 100% of all drive capacity for data storage with zero overhead for redundancy. With N drives of size X, total usable capacity is N×X. No capacity is lost to mirroring or parity. The tradeoff is that there is no fault tolerance – if any single drive fails…

Server administration

Question

Options

ARAID 0
BRAID 1
CRAID 5
DRAID 6

How the community answered

(43 responses)

A
91% (39)
B
5% (2)
C
2% (1)
D
2% (1)

Explanation

RAID 0 (striping) uses 100% of all drive capacity for data storage with zero overhead for redundancy. With N drives of size X, total usable capacity is N×X. No capacity is lost to mirroring or parity. The tradeoff is that there is no fault tolerance – if any single drive fails, all data is lost. RAID 1 sacrifices 50% to mirroring, RAID 5 loses one drive's worth to parity, and RAID 6 loses two drives' worth. RAID 0 is chosen only when maximum capacity and performance outweigh reliability concerns.

Topics

#RAID levels#Storage capacity#RAID 0#Data storage

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