Which of the following scenarios will trigger the recovery and reconstruction of Huawei OceanStor hybrid flash storage hard disks? (Multiple choice)

Question

Options

• AThe hard disk is restored after online diagnosis.
• BInsert it back during hard reconstruction
• CThe system administrator accidentally unplugged a functioning hard disk when replacing a faulty
• DAfter a hard disk fails, the system administrator promptly discovers the faulty disk and replaces it

• A
  8% (4)
• B
  77% (40)
• C
  15% (8)

Explanation

Options B and D are correct because they represent the two defined triggers for hard disk recovery and reconstruction in Huawei OceanStor hybrid flash storage: replacing a failed disk (D) is the standard reconstruction trigger - the system detects the new disk and automatically begins rebuilding lost data from RAID parity - while reinserting a disk during an active hard reconstruction (B) forces the system to restart or recalculate the reconstruction process to account for the newly available disk.

Option A is wrong because online diagnosis is a non-disruptive health check; when a disk is "restored" through online diagnosis, the system recognizes it as continuously healthy and resumes normal operation without triggering a full reconstruction - no data rebuild is necessary.

Option C is wrong because accidentally removing a functioning disk causes RAID degradation, but does not itself trigger reconstruction - if the disk is quickly reinserted within the protection window, the system performs a lighter soft resync, not a full hard reconstruction; reconstruction is triggered by failure + replacement, not by momentary removal of a healthy drive.

Memory tip: Think "trigger = new disk in a broken system." If a disk fails and gets replaced (D) or a disk shows up during an ongoing rebuild (B), reconstruction fires. Soft diagnosis repairs (A) and accidents on healthy disks (C) don't cross that threshold.

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