On Sat, 11 Feb 2012, Craig Sanders <cas@taz.net.au> wrote:
if the drive temps are significantly over about 40C and look like they're heading towards 50+C then i want to shut it down even if the drives are sleeping.
there's usually only a few days/year where it matters (and this summer has been good...i don't think we've had even one 40C day in Melbourne so far), but heat kills drives.
If the drives are sleeping then why not just use the temperature as reported by the motherboard? You could calibrate this by determining the difference in temperature between the motherboard and an idly loaded disk and assume that the difference is the same. Of course the other option is to rely on not all disks in your RAID set dying at once and just letting it run. I rely on the weather forecasts to determine when I should shut systems down, if we get a forecast of >40C then systems which aren't air-conditioned should be shut down. -- My Main Blog http://etbe.coker.com.au/ My Documents Blog http://doc.coker.com.au/