H13-611_V5.0 · Question #298
All RAID types provide fault tolerance through mirroring technology.
The correct answer is B. False. Option B is correct because not all RAID types provide fault tolerance, and those that do don't all rely on mirroring. RAID 0 (striping) distributes data across drives for performance gains but offers zero fault tolerance -- a single drive failure destroys all data. While RAID…
Question
All RAID types provide fault tolerance through mirroring technology.
Exhibit
Options
- ATrue
- BFalse
How the community answered
(42 responses)- A21% (9)
- B79% (33)
Explanation
Option B is correct because not all RAID types provide fault tolerance, and those that do don't all rely on mirroring. RAID 0 (striping) distributes data across drives for performance gains but offers zero fault tolerance -- a single drive failure destroys all data. While RAID 1 does use mirroring, RAID 5 and RAID 6 achieve fault tolerance through parity calculations, not mirroring, so the claim that mirroring is the universal mechanism is also false.
Option A is wrong on two counts: it overstates both which RAID levels are fault-tolerant and how they achieve that protection.
Memory tip: Use the phrase "Zero in RAID 0 means zero protection" to anchor the fact that RAID 0 breaks the "all RAID = fault tolerance" assumption, and remember that RAID 5/6 use parity (think "5 and 6 survive") rather than mirrors.
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