[nylug-talk] Paper IT certs and disk drive fabrication differences -- WAS: Slim home server

[Bryan J. Smith]

On Fri, 2008-05-23 at 12:53 -0400, Eric Moore wrote:
> If you're modelling it as a constant chance of failure for some block
> of time, you should be able to calculate a MTBF.  The exponential
> probability distribution has a mean, and if the failure rate is
> constant, the time before failure will be exponentially distributed.
> 2% per 12 months would give a MTBF of 49.5 years, or 433900 hours.
> As long as you're assuming the failure rate is constant, the MTBF and
> the chance of failure are equivalent numbers.  If they're quoted in
> the same units, MTBF = 1/ln(1-rate).  How can one be more usable than
> the other?

I meant the value mis-represents the failure rate to most consumers.
Most consumers are like, "oh, this should last 400,000 hours and it
didn't even make 40,000!"

Sorry, I should have clarified that.  My apologies and thank you for
doing it for me.  ;)


-- 
Bryan J  Smith              Professional, Technical Annoyance
mailto:b.j.smith at ieee.org  http://www.linkedin.com/in/bjsmith
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           Fission Power:  An Inconvenient Solution