On Wed, Apr 11, 2012 at 04:07:29PM +1000, Toby Corkindale wrote:
This might be something unique to your setup as well, Craig. My experience is in line with Tim's.. Querying the temperature responds with a message about the disk sleeping, and does not power it up.
you may both be right. and probably are. i don't recall right now the exact details of the problem with hddtemp and sleeping, just that they were incompatible.
i'll have to look back over my notes but i had somehow remembered it as it spinning up the drive again. probably wrong.
IIRC there was a bug in hddtemp around 2008 that it would wake up the drive. I'm not sure if that was really a bug or just assumed desired behaviour. Now I think you need to pass an explicit option to read the temperature of a sleeping drive (which will wake it up, making it warmer). Some people had a problem with some drives recording the hddtemp probe as 'activity' that would cause the drive to not go to sleep, but that's a slightly different problem, and I don't know if it was a bug in hddtemp or a bug in the drive firmware. James