A server crashes on the average once in 30 days, i.e., MTBF = 30 days. When…
2016
A server crashes on the average once in 30 days, i.e., MTBF = 30 days. When this happens, it takes 12 hours to reboot, i.e., MTTR = 12 hours. The availability of the server is approximately:
- A.
96.3%
- B.
97.3%
- C.
98.3%
- D.
99.3%
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Correct answer: C
Availability is calculated using the formula MTBF / (MTBF + MTTR).
First, convert MTBF to hours: 30 days * 24 hours/day = 720 hours.
Next, substitute values into the formula: 720 / (720 + 12) = 720 / 732.
Finally, compute the percentage: approximately 0.9836 or 98.36%.
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