ITPEC FE Morning April 2023 Question 15
ITPEC FE Morning April 2023 — Question 15 of 80
RAID 0 (Striping) — highest speed, no redundancy.
RAID 0 splits data across multiple disks in parallel (striping), maximizing read/write speed. If any single disk fails, all data is lost — there is no parity or mirroring.
- •RAID 0 — striping only → fastest, zero fault tolerance
- •RAID 1 — mirroring → data duplicated, survives 1 disk failure
- •RAID 5 — striping + distributed parity → survives 1 disk failure
- •RAID 6 — striping + double parity → survives 2 disk failures
Why not others:
- (b) RAID 1 — mirroring improves reliability, not speed
- (c) RAID 5 — parity calculation adds write overhead
- (d) RAID 6 — double parity adds even more write overhead
Key rule: RAID 0 = zero redundancy, maximum speed. "Highest speed at the cost of reliability" = RAID 0.
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