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Which of the following is used to create parity information?

Which of the following is used to create parity information?

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A.
a hamming code

B.
a clustering code

C.
a mirroring code

D.
a striping code

Explanation:
RAID Level 2 consists of bit-interleaved data on multiple disks. The parity information is created using a
hamming code that detects errors and establishes which part of which drive is in error. It defines a disk drive
system with 39 disks: 32 disks of user storage 66 and seven disks of error recovery coding. This level is not
used in practice and was quickly superseded by the more flexible levels of RAID such as RAID 3 and RAID 5.
Incorrect Answers:
B: Clustering code is not used to create parity information.
C: A mirroring code is not used to create parity information. Mirroring is used to describe the method used in
RAID level 1.
D: A striping code is not used to create parity information. Striping is the method used to write data across
multiple disks in RAID systems.

Krutz, Ronald L. and Russell Dean Vines, The CISSP Prep Guide: Mastering the CISSP and ISSEP Exams,
2nd Edition, Wiley Publishing, Indianapolis, 2004, p. 144


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