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I have 8TB HDD WD Gold. Here they claim 2M MTBF (mean time before failure) hours. What is the statistical variance (estimated at least) of this data ?

user865044
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1 Answers1

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MTBF is often based on an exponential distribution model exp(-lambda*T). The MTBF is equal to 1/lambda. The variance can be calculated, it is 1/lambda², that is a standard deviation also equal to 1/lamdba (hence equal to the MTBF itself).

PierU
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