SK0-003 · Question #256
Which of the following BEST describes the difference between RAID 5 and RAID 6?
The correct answer is C. RAID 6 uses more parity drives than RAID 5. The key difference between RAID 5 and RAID 6 lies in their level of fault tolerance and the number of parity blocks used. RAID 6 uses more parity information than RAID 5, allowing it to withstand more disk failures.
Question
Which of the following BEST describes the difference between RAID 5 and RAID 6?
Options
- ARAID 5 uses a dedicated parity drive and RAID 6 does not.
- BRAID 6 uses a dedicated parity drive and RAID 5 does not.
- CRAID 6 uses more parity drives than RAID 5.
- DRAID 5 uses more parity drives than RAID 6.
How the community answered
(46 responses)- B2% (1)
- C93% (43)
- D4% (2)
Why each option
The key difference between RAID 5 and RAID 6 lies in their level of fault tolerance and the number of parity blocks used. RAID 6 uses more parity information than RAID 5, allowing it to withstand more disk failures.
Neither RAID 5 nor RAID 6 use a 'dedicated' parity drive; both distribute parity information across all drives in the array.
This statement is incorrect because both RAID 5 and RAID 6 distribute parity information across all drives, and neither relies on a single dedicated parity drive.
RAID 5 uses a single distributed parity block, which allows the array to recover from a single disk failure. RAID 6, on the other hand, uses two independent distributed parity blocks, enabling it to tolerate the simultaneous failure of up to two disks without data loss, thus offering greater redundancy.
RAID 5 uses only one parity block, which is fewer than the two parity blocks used by RAID 6, making this statement incorrect.
Concept tested: RAID 5 vs RAID 6 fault tolerance and parity
Source: https://learn.microsoft.com/en-us/windows-server/storage/disk-management/raid-levels
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