ITPEC FE Morning October 2023 Question 16
Source exam: ITPEC FE Morning October 2023Topic: Computer Systems & Hardware
ITPEC FE Morning October 2023 — Question 16 of 80
RAID6 — dual parity across drives — survives two simultaneous disk failures.
RAID6 writes two independent parity blocks to different drives in the group.
- •RAID0 — striping only, no redundancy at all
- •RAID1 — mirroring (copies), not parity-based
- •RAID5 — single parity block → tolerates only one disk failure
- •RAID6 — dual parity blocks → tolerates two simultaneous disk failures
Key rule: RAID5 = 1 parity (1 failure), RAID6 = 2 parity (2 failures). The question says "two parity records" → RAID6.
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