220-801 · Question #215
Which of the following is the correct configuration for a RAID 5 array?
The correct answer is B. A three disk set with two data strips and a parity strip. RAID 5 uses block-level striping with distributed parity. The minimum configuration requires 3 disks: two disks hold data strips and one disk holds the parity strip (though parity is actually distributed across all drives in rotation). The parity information allows the array to…
Question
Options
- AA two disk set with one data strip
- BA three disk set with two data strips and a parity strip
- CA two disk set with two data strips
- DA four disk set with two sets of data strips
How the community answered
(22 responses)- A9% (2)
- B86% (19)
- C5% (1)
Explanation
RAID 5 uses block-level striping with distributed parity. The minimum configuration requires 3 disks: two disks hold data strips and one disk holds the parity strip (though parity is actually distributed across all drives in rotation). The parity information allows the array to reconstruct data if any single drive fails. This gives RAID 5 a balance of performance, storage efficiency, and fault tolerance, making it one of the most common RAID configurations.
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