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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.

Storage Components

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)
  • A
    3% (1)
  • B
    5% (2)
  • D
    92% (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.

AIncreased security

RAID configurations primarily offer redundancy and performance, not increased security; security is typically handled by access controls, encryption, and other measures.

BIncreased reliability

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.

CIncreased rebuild time

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.

DIncreased performanceCorrect

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

Topics

#RAID 5#performance optimization#RAID configuration

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