SG0-001 · Question #406
When comparing 7,200 RPM disk drives to 15,000 RPM disk drives, the 15,000 RPM disk drives will have:
The correct answer is C. lower latency. 15,000 RPM disk drives spin faster than 7,200 RPM drives, resulting in reduced seek times and significantly lower rotational latency.
Question
When comparing 7,200 RPM disk drives to 15,000 RPM disk drives, the 15,000 RPM disk drives will have:
Options
- Aslower rotational speed.
- Blower IOPs capability.
- Clower latency.
- Dslower throughput.
How the community answered
(48 responses)- A2% (1)
- B2% (1)
- C92% (44)
- D4% (2)
Why each option
15,000 RPM disk drives spin faster than 7,200 RPM drives, resulting in reduced seek times and significantly lower rotational latency.
15,000 RPM is a higher rotational speed than 7,200 RPM, not slower.
Higher rotational speed generally leads to higher IOPs (Input/Output Operations Per Second) capability because data can be accessed faster.
Lower latency is a direct benefit of higher rotational speeds. The faster a disk spins (15,000 RPM vs 7,200 RPM), the quicker the desired data sector rotates under the read/write head, which reduces rotational latency and overall average access time.
Higher rotational speed typically contributes to higher, not slower, throughput due to faster data access and transfer rates from the platters.
Concept tested: Disk drive rotational speed impact on performance
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