Which of the following scenarios will cause Huawei Oceanstor hybrid storage to initiate a partial reconstruction? (Multiple choice)

Question

Options

• AHard disk failure
• BThe system detects a CK that cannot be repaired
• CIO access returns SECTOR FAULT error
• DReinsert the hard disk within two minutes after it is unplugged

• A
  13% (3)
• B
  79% (19)
• D
  8% (2)

Explanation

Partial reconstruction targets localized data damage - specific sectors or chunks - rather than rebuilding an entire disk. Option B is correct because when OceanStor detects a CK (chunk) with uncorrectable data integrity errors, it must reconstruct just that chunk from RAID parity, a scoped operation by definition. Option C is correct because a SECTOR FAULT on an IO access pinpoints a specific bad sector, allowing the system to use parity data to rebuild only that sector rather than the whole disk.

Option A is wrong because a complete hard disk failure triggers a full reconstruction - the entire disk must be rebuilt onto a hot spare, not just parts of it. Option D is wrong because reinserting a disk within the protection window (typically ~2 minutes) causes the system to recognize it as the same disk and resume synchronization without initiating any reconstruction at all.

Memory tip: Partial = Pinpointed damage. If the error points to a specific location (a bad sector = C, an uncorrectable chunk = B), expect partial reconstruction. If a whole disk is gone (A), expect full reconstruction. If the disk came right back (D), expect nothing - the system acts as if it never left.

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