Recovery · Question 12 of 12
A hard drive has an MTBF of 1,000,000 hours. A data center runs 10,000 of these drives. What is a sensible conclusion?
1 answer is correct. Hard
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Answer
- B Statistically, a drive fails about every 100 hours
Explanation
The MTBF is an average across many devices. With 10,000 drives, 1,000,000 ÷ 10,000 gives roughly 100 hours between two failures in the fleet. Redundancy such as RAID and spare parts therefore remain necessary.