Which of the following RAID configurations consists of mirrored disks?
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A. B. C. D.B.
The correct answer is B. RAID 1.
RAID (Redundant Array of Inexpensive Disks) is a technology used to increase data availability, improve performance, and provide fault tolerance in storage systems.
There are several types of RAID configurations, including RAID 0, RAID 1, RAID 5, and RAID 6. Each RAID level uses different techniques to store data across multiple disks.
RAID 0 is not a redundant configuration since it stripes data across multiple disks without parity or mirroring, so it offers high performance but no fault tolerance.
RAID 1 is a mirrored configuration that stores data across two or more disks by making an exact copy of the data on each disk. In case of a disk failure, the other disk(s) can take over and continue to function without any data loss.
RAID 5 and RAID 6 are both parity-based configurations that stripe data across multiple disks with parity information to provide fault tolerance. However, RAID 5 requires at least three disks, while RAID 6 requires at least four disks. RAID 5 uses one parity disk, while RAID 6 uses two parity disks, which provides higher fault tolerance than RAID 5.
In conclusion, RAID 1 consists of mirrored disks, making it the correct answer to the given question.