Re: RAID Class Drives`

[Mattias Wadenstein <maswan@acc.umu.se>]

On Fri, 19 Mar 2010, Aryeh Gregor wrote:

> On Fri, Mar 19, 2010 at 4:15 AM, John Robinson
> <john.robinson@anonymous.org.uk> wrote:
>> Do you have a reference for this? Most drives' operating temperature range
>> is specified up to 55°C, sometimes higher for enterprise drives, without any
>> indication (apart from common sense perhaps) that running them this hot
>> reduces lifespan.
>
> Google's study of >100,000 disks over 9 months or so
> <http://labs.google.com/papers/disk_failures.html> suggests that
> hotter drives don't fail much more often:
>
> ". . . failures do not increase when the average temperature
> increases. In fact, there is a clear trend showing that lower
> temperatures are associated with higher failure rates.  Only at very
> high temperatures is there a slight reversal of this trend." (page 5
> of PDF)

Do check out figure 5 though, I wouldn't run the drives hotter than 
40-45°C based on that which does seem to indicate that hot drives don't 
last as long. But then again, so would running them at <30°C...

/Mattias Wadenstein
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