ITPEC IP April 2022 Question 16
ITPEC IP April 2022 — Question 16 of 100
RAID 5 and mirroring can both recover data after one disk fails, whereas striping alone cannot. RAID 5 distributes data and parity across multiple disks; if one disk fails, its contents can be reconstructed from the surviving data and parity. Mirroring maintains duplicate copies on separate disks, so the copy on the working disk remains available. Plain striping divides data across disks to improve speed but stores no parity or duplicate copy.
Answer (c)
Why not others:
- any choice containing only striping treats performance distribution as though it were fault tolerance
- excluding either RAID 5 or mirroring omits a valid one-disk recovery method
Key rule: Redundancy enables recovery: RAID 5 uses parity, mirroring uses duplication, and RAID 0-style striping provides neither.
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