SK0-003 · Question #697
Which of the following is the MINIMUM number of disks necessary for a RAID 50 array?
The correct answer is D. 6. RAID 50 is a nested RAID level that stripes data across multiple RAID 5 sets to achieve both performance and redundancy.
Question
Which of the following is the MINIMUM number of disks necessary for a RAID 50 array?
Options
- A3
- B4
- C5
- D6
How the community answered
(58 responses)- B2% (1)
- C3% (2)
- D95% (55)
Why each option
RAID 50 is a nested RAID level that stripes data across multiple RAID 5 sets to achieve both performance and redundancy.
Three disks are the minimum for a single RAID 5 array, not a RAID 50 array.
Four disks are insufficient for two separate RAID 5 sets, which each require a minimum of three disks.
Five disks cannot form two RAID 5 sets, as each RAID 5 set needs at least three disks.
RAID 50 combines RAID 0 (striping) and RAID 5 (striping with distributed parity). It requires at least two independent RAID 5 arrays, which are then striped together. Since a single RAID 5 array requires a minimum of three disks, two RAID 5 arrays would collectively require a minimum of 3 + 3 = 6 disks.
Concept tested: RAID 50 minimum disk requirements
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