SG0-001 · Question #78
Which of the following RAID levels uses parity?
The correct answer is D. RAID 6. RAID 6 is a RAID level that uses parity for data redundancy and fault tolerance, specifically employing two independent parity blocks to protect against two simultaneous disk failures.
Question
Which of the following RAID levels uses parity?
Options
- ARAIDO
- BRAID 1
- CRAID 0+1
- DRAID 6
How the community answered
(56 responses)- A2% (1)
- B2% (1)
- C5% (3)
- D91% (51)
Why each option
RAID 6 is a RAID level that uses parity for data redundancy and fault tolerance, specifically employing two independent parity blocks to protect against two simultaneous disk failures.
RAID 0 uses striping for performance but provides no data redundancy and therefore does not use parity or mirroring.
RAID 1 uses mirroring to duplicate data across two disks for redundancy, but it does not use parity.
RAID 0+1 combines striping and mirroring; its redundancy is achieved through mirroring, not parity calculations.
RAID 6 employs two independent parity blocks, which are distributed across all the drives in the array. This dual parity scheme allows the RAID array to sustain the failure of any two disks simultaneously without data loss, providing enhanced fault tolerance.
Concept tested: RAID levels and parity for redundancy
Source: https://learn.microsoft.com/en-us/windows/win32/fileio/raid-overview
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