ITPEC FE Subject A April 2026 Question 12
ITPEC FE Subject A April 2026 — Question 12 of 60
RAID 1 — mirroring, the only redundant level that works with exactly two drives.
RAID 1 writes identical data to both disks. Either drive can fail without data loss, at the cost of halving the usable capacity.
Answer (b)
Why not others:
- (a) RAID 0 — striping for speed with no redundancy; losing one disk loses the whole array, the opposite of what is asked
- (c) RAID 5 — distributed parity, requires a minimum of 3 drives
- (d) RAID 6 — double parity, requires a minimum of 4 drives
Key rule: Match the level to the drive count first — with 2 disks the only choices are RAID 0 (no protection) and RAID 1 (mirroring), so a question asking for fault tolerance answers itself.
AI-generated — may contain errors
The original exam layout is preserved in the image so diagrams, formulas, tables, and code remain accurate.
This question comes from an official ITPEC past paper. ITPEC Practice is an independent study tool and is not affiliated with ITPEC. See the official FE past-paper collection or Report an issue.