220-802 · Question #784
A server is configured to boot with a "mirrored" RAID configuration. Which of the following BEST describes this configuration?
The correct answer is B. RAID 1. RAID 1 is the 'mirroring' RAID level. In RAID 1, identical data is written simultaneously to two (or more) drives. If one drive fails, the system continues to operate normally using the surviving mirror - making it the simplest and most direct form of redundancy. The other RAID…
Question
A server is configured to boot with a "mirrored" RAID configuration. Which of the following BEST describes this configuration?
Options
- ARAID 0
- BRAID 1
- CRAID 3
- DRAID 5
How the community answered
(31 responses)- B94% (29)
- C3% (1)
- D3% (1)
Explanation
RAID 1 is the 'mirroring' RAID level. In RAID 1, identical data is written simultaneously to two (or more) drives. If one drive fails, the system continues to operate normally using the surviving mirror - making it the simplest and most direct form of redundancy. The other RAID levels use different techniques: RAID 0 is 'striping,' which splits data across multiple drives for improved performance but offers zero fault tolerance (a single drive failure loses all data); RAID 3 uses byte-level striping with a dedicated parity drive; RAID 5 uses block-level striping with distributed parity across all drives, tolerating one drive failure. 'Mirroring' is exclusively associated with RAID 1.
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