Which RAID level creates a mirror of all disks for storing data?

Which RAID level creates a mirror of all disks for storing data?

  1. a) RAID Level 0
  2. b) RAID Level 1
  3. c) RAID Level 2
  4. d) RAID Level 3

From the Combined Bank Senior Officer October 2021 – Preliminary exam, question 3 of 108.

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