98-365 · Question #55
Which RAID level uses parity information to recover data from a failed disk?
The correct answer is C. RAID 5. RAID 5 provides data redundancy by distributing both data blocks and parity information across all disks in the array. This allows the system to reconstruct data if a single disk fails.
Question
Which RAID level uses parity information to recover data from a failed disk?
Options
- ARAID 0
- BRAID 1
- CRAID 5
- DRAID 10
How the community answered
(29 responses)- A3% (1)
- B3% (1)
- C86% (25)
- D7% (2)
Why each option
RAID 5 provides data redundancy by distributing both data blocks and parity information across all disks in the array. This allows the system to reconstruct data if a single disk fails.
RAID 0 (striping) improves performance by spreading data across multiple disks but provides no redundancy and does not use parity.
RAID 1 (mirroring) provides redundancy by creating an exact duplicate of data on a second disk but does not use parity information.
RAID 5 employs a distributed parity scheme, where parity information is spread across all member disks along with the data. If one disk fails, the data from the lost disk can be rebuilt using the data and parity information from the remaining operational disks in the array.
RAID 10 (striped mirrors) combines striping and mirroring for both performance and redundancy but does not primarily use distributed parity for recovery.
Concept tested: RAID levels and data recovery mechanisms
Source: https://learn.microsoft.com/en-us/windows-server/storage/disk-management/understanding-raid
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