SG0-001 · Question #139
Which of the following is the MINIMUM number of disks needed to implement RAID 5?
The correct answer is B. 3. RAID 5 requires a minimum of three disks to implement, dedicating one for distributed parity and the remaining for data striping.
Question
Which of the following is the MINIMUM number of disks needed to implement RAID 5?
Options
- A2
- B3
- C4
- D5
How the community answered
(19 responses)- A5% (1)
- B89% (17)
- D5% (1)
Why each option
RAID 5 requires a minimum of three disks to implement, dedicating one for distributed parity and the remaining for data striping.
RAID 5 cannot be implemented with only two disks, as it requires more drives to distribute both data and parity information effectively.
RAID 5 distributes parity information across all drives along with data blocks. To correctly implement distributed parity and allow for recovery from a single disk failure, there must be at least two data disks and one parity equivalent, necessitating a minimum of three physical disks.
While four disks can be used with RAID 5, it is not the minimum requirement; three disks are sufficient to form a RAID 5 array.
While five disks can be used with RAID 5, it is not the minimum requirement; three disks are sufficient to form a RAID 5 array.
Concept tested: RAID 5 minimum disk requirements
Source: https://learn.microsoft.com/en-us/windows-server/storage/disk-management/raid-levels
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