220-802 Question #892: Real Exam Question with Answer & Explanation

The correct answer is B: RAID 1. A mirrored set writes identical data to two separate drives simultaneously, which is the defining characteristic of RAID 1, providing full redundancy at the cost of half the total raw capacity.

Question

A mirrored set is another name for which of the following?

Options

ARAID 0
BRAID 1
CRAID 3
DRAID 5

Explanation

A mirrored set writes identical data to two separate drives simultaneously, which is the defining characteristic of RAID 1, providing full redundancy at the cost of half the total raw capacity.

Common mistakes.

A. RAID 0 is disk striping, which splits data across two or more drives for performance but provides no redundancy and no mirroring.
C. RAID 3 uses byte-level striping across multiple drives with a dedicated parity drive, not mirroring.
D. RAID 5 uses block-level striping with distributed parity across three or more drives, providing fault tolerance through parity rather than mirroring.

Concept tested. RAID 1 disk mirroring for redundancy

Reference. https://learn.microsoft.com/en-us/windows-server/storage/storage-spaces/storage-spaces-fault-tolerance

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