SK0-003 · Question #254
Which of the following BEST describes RAID 1?
The correct answer is A. Mirroring. RAID 1 is a RAID configuration that duplicates data across two or more disks, providing full data redundancy. This process is commonly known as mirroring, ensuring data availability even if one disk fails.
Question
Which of the following BEST describes RAID 1?
Options
- AMirroring
- BStriping
- CStriping with parity
- DStriping with mirroring
How the community answered
(67 responses)- A91% (61)
- B3% (2)
- C1% (1)
- D4% (3)
Why each option
RAID 1 is a RAID configuration that duplicates data across two or more disks, providing full data redundancy. This process is commonly known as mirroring, ensuring data availability even if one disk fails.
RAID 1 implements data mirroring, where an exact copy of the data is written simultaneously to two or more disks. If one disk fails, the data remains accessible from the other mirrored disk, providing excellent fault tolerance and data redundancy.
Striping describes RAID 0, where data is split across multiple disks for performance without providing any redundancy.
Striping with parity describes RAID 5 or RAID 6, which combine data striping with error-checking parity information for redundancy.
Striping with mirroring describes RAID 10 or RAID 0+1, which are nested RAID levels combining both techniques, whereas RAID 1 is solely mirroring.
Concept tested: RAID 1 characteristics and function
Source: https://learn.microsoft.com/en-us/windows-server/storage/disk-management/raid-levels
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