SG0-001 · Question #428
Which of the following is an advantage of moving from a small RAID 5 set to a large RAID 5 set?
The correct answer is D. Increased performance. Moving from a small to a large RAID 5 set can increase performance due to having more disks to distribute I/O operations across.
Question
Which of the following is an advantage of moving from a small RAID 5 set to a large RAID 5 set?
Options
- AIncreased security
- BIncreased reliability
- CIncreased rebuild time
- DIncreased performance
How the community answered
(37 responses)- A3% (1)
- B5% (2)
- D92% (34)
Why each option
Moving from a small to a large RAID 5 set can increase performance due to having more disks to distribute I/O operations across.
RAID configurations primarily offer redundancy and performance, not increased security; security is typically handled by access controls, encryption, and other measures.
While RAID 5 provides reliability against a single drive failure, moving to a larger RAID 5 set generally decreases overall reliability due to the higher statistical probability of a second drive failing during a rebuild operation, which is exacerbated by longer rebuild times.
An increased rebuild time is a disadvantage of moving to a larger RAID 5 set, not an advantage, as rebuilding a larger array with more data takes longer and increases the window of vulnerability.
A larger RAID 5 set typically means more physical drives contributing to the array. With more drives, I/O operations (reads and writes) can be striped across a greater number of spindles, allowing for higher aggregate throughput and parallelism, thus increasing overall performance compared to a smaller RAID 5 set.
Concept tested: RAID 5 array sizing and performance implications
Source: https://learn.microsoft.com/en-us/windows-server/storage/raid/raid-level-details
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