CompTIA
220-802 · Question #235
220-802 Question #235: Real Exam Question with Answer & Explanation
The correct answer is A: Replace the failed drives and verify the RAID rebuilds completely.. RAID 6 tolerates up to two simultaneous drive failures, so replacing both faulted drives and allowing the array to rebuild is sufficient to restore redundancy without data loss.
Question
A technician is troubleshooting a RAID 6 array on a high end CAD/CAM workstation. Two disk drives have their fault lights on. Which of the following is the BEST action for the technician to perform when fixing this problem?
Options
- AReplace the failed drives and verify the RAID rebuilds completely.
- BReseat the drives, backup the data, and then replace them.
- CReseat the drives and monitor the RAID status over a few days.
- DReplace the failed drives and restore the data from a known good backup.
Explanation
RAID 6 tolerates up to two simultaneous drive failures, so replacing both faulted drives and allowing the array to rebuild is sufficient to restore redundancy without data loss.
Common mistakes.
- B. Reseating the drives is inappropriate when fault lights confirm actual drive failure; reseating delays proper remediation and does not address failed hardware.
- C. Monitoring over several days is dangerous because RAID 6 with two failed drives has zero remaining fault tolerance - any additional failure during that period would cause total data loss.
- D. Restoring from backup is unnecessary since RAID 6 still holds intact data on the surviving drives; a full restore would be slower and riskier than a standard RAID rebuild.
Concept tested. RAID 6 dual-drive failure recovery procedure
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