SG0-001 · Question #577
Which of the following would be an indicator that a storage array is properly handling read requests?
The correct answer is B. High cache hit rate. A high cache hit rate indicates a storage array is efficiently handling read requests by serving data from its fast cache, minimizing slower disk access.
Question
Which of the following would be an indicator that a storage array is properly handling read requests?
Options
- AHigh disk drive latency
- BHigh cache hit rate
- CGreen environment indicators
- DLow cache hit rate
How the community answered
(35 responses)- A3% (1)
- B86% (30)
- C3% (1)
- D9% (3)
Why each option
A high cache hit rate indicates a storage array is efficiently handling read requests by serving data from its fast cache, minimizing slower disk access.
High disk drive latency indicates poor performance, as requests are taking a long time to be served by the physical disks.
A high cache hit rate means that the requested data is frequently found in the storage array's cache memory rather than having to be retrieved from the slower physical disks. This significantly reduces latency and improves the performance of read requests.
Green environment indicators typically relate to the physical health and operational status (e.g., power, temperature) of the array, not its read request handling performance.
A low cache hit rate means that data is frequently not found in cache, forcing the array to access slower physical disks, which results in poorer read performance.
Concept tested: Storage array read performance metrics
Source: https://learn.microsoft.com/en-us/windows-server/storage/storage-spaces/understand-the-cache
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