Hard disk metrics – identifying non-parameters of performance Which of the following is <em>not</em> a recognized hard disk performance parameter?

Introduction / Context:
Disk performance is commonly summarized by seek time, rotational latency, and overall access time, which together affect throughput and responsiveness. Recognizing the correct terminology avoids confusion when reading storage specifications.

Given Data / Assumptions:

• We compare listed terms with standard HDD metrics.
• Traditional HDDs use moving heads and spinning platters.

Concept / Approach:
Seek time measures how long the head takes to move to the right track. Latency (rotational latency) is the waiting time for the sector to rotate under the head. Access time is the sum (seek + latency, sometimes plus controller overhead). “Break time” is not a recognized HDD performance metric.

Step-by-Step Solution:

Verification / Alternative check:
Vendor datasheets and benchmarks always cite seek, rotational latency, and access time; “break time” does not appear as a formal metric.

Why Other Options Are Wrong:

• Seek time: Standard metric.
• Latency period: Standard metric (rotational latency).
• Access time: Standard composite metric.

Common Pitfalls:

• Confusing “throughput” (MB/s) with time-based metrics; both are important but distinct.

Final Answer:
Break time