SK0-003 · Question #867
Which of the following RAID levels could be selected with three drives?
The correct answer is B. RAID 5. RAID 5 is the only listed RAID level that can be selected with exactly three drives, as it requires a minimum of three disks to implement distributed parity for data redundancy.
Question
Which of the following RAID levels could be selected with three drives?
Options
- ARAID 0
- BRAID 5
- CRAID 6
- DRAID 10
How the community answered
(23 responses)- A9% (2)
- B87% (20)
- C4% (1)
Why each option
RAID 5 is the only listed RAID level that can be selected with exactly three drives, as it requires a minimum of three disks to implement distributed parity for data redundancy.
While RAID 0 can technically be implemented with three drives, it offers no fault tolerance, and RAID 5 is a more common and beneficial use of three drives for redundancy.
RAID 5 requires a minimum of three drives to implement its block-level striping with distributed parity, allowing for fault tolerance where one drive can fail without data loss. With three drives, RAID 5 provides both performance and data redundancy.
RAID 6 requires a minimum of four drives to implement its dual parity, which provides tolerance for two drive failures.
RAID 10 (RAID 1+0) requires a minimum of four drives, typically implemented as two mirrored pairs that are then striped together.
Concept tested: RAID levels and minimum drive requirements
Source: https://learn.microsoft.com/en-us/windows-server/storage/disk-management/understanding-raid
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