CompTIA
220-802 · Question #475
220-802 Question #475: Real Exam Question with Answer & Explanation
The correct answer is B: 2. RAID 1 is a mirroring configuration that duplicates data identically across drives. It requires exactly 2 disks at minimum to create one mirror pair.
Question
A technician is attempting to install a RAID 1 configuration. Which of the following is the MINIMUM amount of disks that can be used to create a RAID 1 array?
Options
- A1
- B2
- C3
- D4
Explanation
RAID 1 is a mirroring configuration that duplicates data identically across drives. It requires exactly 2 disks at minimum to create one mirror pair.
Common mistakes.
- A. A single disk has nothing to mirror to and provides no redundancy, which is the core purpose of RAID 1.
- C. Three disks exceed the minimum for RAID 1, though three-disk mirror sets are possible in some implementations.
- D. Four disks exceed the minimum; RAID 10 (a nested level) uses four disks, but basic RAID 1 only requires two.
Concept tested. RAID 1 minimum disk requirement
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