SK0-003 · Question #282
Which of the following RAID levels supports fault tolerance by writing parity to only one drive in the array?
The correct answer is A. RAID 3. The question identifies a RAID level that provides fault tolerance through a dedicated single-drive parity. RAID 3 uses a dedicated parity drive for error correction.
Question
Which of the following RAID levels supports fault tolerance by writing parity to only one drive in the array?
Options
- ARAID 3
- BRAID 5
- CRAID 6
- DRAID 10
How the community answered
(50 responses)- A88% (44)
- B2% (1)
- C4% (2)
- D6% (3)
Why each option
The question identifies a RAID level that provides fault tolerance through a dedicated single-drive parity. RAID 3 uses a dedicated parity drive for error correction.
RAID 3 uses byte-level striping across multiple data drives with a dedicated parity drive. This configuration allows for fault tolerance as the data can be reconstructed from the remaining data drives and the single parity drive if one data drive fails.
RAID 5 uses block-level striping with distributed parity, meaning parity information is spread across all drives in the array, not on a single dedicated drive.
RAID 6 uses block-level striping with dual distributed parity, allowing for the failure of two drives, and thus does not use parity on only one drive.
RAID 10 is a nested RAID level (RAID 1+0) that combines mirroring and striping, providing fault tolerance through mirroring data, not through a single dedicated parity drive.
Concept tested: RAID 3 parity implementation
Source: https://learn.microsoft.com/en-us/windows-server/storage/disk-management/understanding-raid
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