220-802 · Question #892
A mirrored set is another name for which of the following?
The correct answer is B. RAID 1. A mirrored set writes identical data to two separate drives simultaneously, which is the defining characteristic of RAID 1, providing full redundancy at the cost of half the total raw capacity.
Question
A mirrored set is another name for which of the following?
Options
- ARAID 0
- BRAID 1
- CRAID 3
- DRAID 5
How the community answered
(61 responses)- A2% (1)
- B92% (56)
- C2% (1)
- D5% (3)
Why each option
A mirrored set writes identical data to two separate drives simultaneously, which is the defining characteristic of RAID 1, providing full redundancy at the cost of half the total raw capacity.
RAID 0 is disk striping, which splits data across two or more drives for performance but provides no redundancy and no mirroring.
RAID 1, known as disk mirroring, maintains an exact duplicate copy of all data on a second drive in real time. If one drive fails, the mirror drive contains a complete and immediately usable copy, allowing the system to continue operating without data loss. This configuration requires a minimum of two drives and provides 50 percent storage efficiency since both drives hold the same data.
RAID 3 uses byte-level striping across multiple drives with a dedicated parity drive, not mirroring.
RAID 5 uses block-level striping with distributed parity across three or more drives, providing fault tolerance through parity rather than mirroring.
Concept tested: RAID 1 disk mirroring for redundancy
Source: https://learn.microsoft.com/en-us/windows-server/storage/storage-spaces/storage-spaces-fault-tolerance
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