HP2-H35 · Question #46
How is the reliability of a storage device measured?
The correct answer is A. Mean time between failures. Mean Time Between Failures (MTBF) is the standard metric for storage device reliability because it quantifies how long a device is expected to operate before experiencing a failure - a direct measure of dependability. Option B (read/write/seek speed) describes performance, not…
Question
How is the reliability of a storage device measured?
Options
- AMean time between failures
- BBy read/write or seek speed
- CTotal bytes written
- DPer megabyte
How the community answered
(35 responses)- A91% (32)
- B3% (1)
- D6% (2)
Explanation
Mean Time Between Failures (MTBF) is the standard metric for storage device reliability because it quantifies how long a device is expected to operate before experiencing a failure - a direct measure of dependability. Option B (read/write/seek speed) describes performance, not reliability. Option C (total bytes written) is a durability metric used primarily for SSDs (called TBW), but it measures wear limits rather than failure probability. Option D (per megabyte) is a pricing or cost metric, not a reliability measurement.
Memory tip: Think "reliability = how long until it fails" - MTBF has failure right in the name, making it the only choice that directly answers the question.
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