SG0-001 · Question #138
Which of the following RAID levels can sustain any double disk failure?
The correct answer is D. RAID 6. RAID 6 is the only listed RAID level that can withstand the failure of any two disks simultaneously due to its dual parity implementation.
Question
Which of the following RAID levels can sustain any double disk failure?
Options
- ARAD 1+0
- BRAID 3 r
- CRAID 5
- DRAID 6
How the community answered
(27 responses)- A4% (1)
- B4% (1)
- D93% (25)
Why each option
RAID 6 is the only listed RAID level that can withstand the failure of any two disks simultaneously due to its dual parity implementation.
RAID 1+0 (RAID 10) can tolerate multiple disk failures, but only if the failures occur in different mirrored pairs, not any arbitrary two disks.
RAID 3 uses a dedicated parity disk and can only sustain a single disk failure within the array.
RAID 5 uses distributed parity and can only sustain a single disk failure within the array before data loss occurs.
RAID 6 utilizes dual independent parity blocks, distributing two distinct parity sets across all drives in the array. This configuration allows the RAID array to reconstruct data and remain operational even after the failure of any two physical drives, offering superior fault tolerance against multiple disk failures.
Concept tested: RAID levels and fault tolerance
Source: https://learn.microsoft.com/en-us/windows-server/storage/disk-management/raid-levels
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