ITPEC FE Morning April 2021 Question 15
ITPEC FE Morning April 2021 — Question 15 of 80
RAID 0 (Striping) — no redundancy, all data lost if any disk fails.
RAID levels overview:
- RAID 0 — striping, no parity, no mirror → any disk failure = total data loss
- RAID 1 — mirroring → 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 — mirrors data across disks; one disk can fail safely
- (c) RAID 5 — uses parity to rebuild data from a single failed disk
- (d) RAID 6 — uses double parity; tolerates two simultaneous disk failures
Key rule: RAID 0 = zero redundancy = zero recovery on failure.
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