Which of the following statements pertaining to disk mirroring is incorrect?

Question

Options

• AMirroring offers better performance in read operations but writing hinders system
• BMirroring is a hardware-based solution only.
• CMirroring offers a higher fault tolerance than parity.
• DMirroring is usually the less cost-effective solution.

• A
  2% (1)
• B
  88% (44)
• C
  4% (2)
• D
  6% (3)

Explanation

Disk mirroring (RAID 1) can be implemented in both hardware and software. Software RAID mirroring is commonly supported by modern operating systems (e.g., Windows Disk Management, Linux mdadm). The other statements are correct: mirroring improves read performance because reads can be served from either disk simultaneously; mirroring offers higher fault tolerance than parity-based RAID because it maintains a full duplicate of data; and mirroring is generally less cost-effective because it requires 2x the storage capacity with no additional usable space gained.

No community discussion yet for this question.