Which RAID level provides the highest data redundancy and fa

Which raid level provides the highest data redundancy and fa - CompTIA Server+ SK0-005

Question

Which RAID level provides the highest data redundancy and fault tolerance?

Answers

RAID 0
RAID 1
RAID 5
correct

RAID 10

Explanation

Correct Answer: D. RAID 10

RAID 10 (also known as RAID 1+0) combines the mirroring of RAID 1 with the striping of RAID 0, offering both high performance and maximum data redundancy.

It requires a minimum of four drives and can tolerate the failure of one drive in each mirrored pair without data loss. This makes RAID 10 ideal for environments that demand both speed and fault tolerance, such as database servers and enterprise applications.

Why Other Options Are Incorrect :

A. RAID 0: RAID 0 uses striping without parity or mirroring, which improves performance but offers no fault tolerance. If a single drive fails, all data is lost, making it unsuitable for environments requiring redundancy.
B. RAID 1: RAID 1 mirrors data across two drives, providing basic redundancy. While it protects against a single drive failure, it lacks the performance benefits and additional fault tolerance of RAID 10, especially in larger arrays.
C. RAID 5: RAID 5 uses block-level striping with distributed parity. It provides some fault tolerance (can survive one drive failure), but not as much as RAID 10. Write performance is also slower due to parity calculations.

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