Tony Alfrey wrote:
Dave Howorth wrote:
Tony Alfrey wrote:
Miguel Medalha wrote:
Actually HD temp has proven to be of little consequence to harddrive lifespan. Google conducted a test a couple years back and found next to no correlation to HD temp and drive failure. Google did this over 5 years by recording every failure they had and took many variables into account to come up with probably one of the most comprehensive real world hd reliability tests.
Not "of little consequence". People tend to quickly jump conclusions but in fact the data needs interpretation.
<snipping much angst>
Hi kids! For the physics of the problem, see http://en.wikipedia.org/wiki/Arrhenius_plot
"From the Google data, calculate the activation energy for temperature-induced hard drive failure"
Interesting idea. Do you have a link to some evidence that disk failures are governed by an Arrhenius relation?
Grain boundaries are physical phenomena rather than chemical. I thought the current evidence pointed to them behaving like a glass.
The Arrhenius relation is often applied to stochastic processes with some ill-defined temperature-related causality. Your grain boundary example is good. While there is a specific amount of energy required for a portion of the boundary to make a "break", and while the average thermal energy at room temperature may be well below that energy, there is still a finite probability that the break occurs because the Boltzmann relation provides some tiny fraction of the whole ensemble of 'boundary segments' at a temperature equal to the 'break temperature'. It's like a problem I was once given in Statistical Mechanics: a) Calculate the energy required for a penny sitting on a table to jump up and flip over. b) Calculate the probability that the penny will do this spontaneously at room temperature.
The Arrhenius relation is a nice fall-back when the failure rate looks logarithmic.
So no actual evidence then :-P -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org