== stand-by disk ==
Manual querying either by command line or connecting to daemon: reported as 
sleeping, no temperature given, disk still stand-by

== sleeping disk ==
Manual querying either by command line or connecting to daemon: disk is woken 
and spun up, but still reported as sleeping in first response. After a short 
time, a temperature is given. Disks are also spun and woken up when querying 
e.g. their energy state by hdparm.

Note: after the disk has slept, I can not send it into stand-by or sleep
anymore (until reboot). The issue is unrelated to hddtemp.

== conclusion ==

My personal problem is solved (I can spin down the disks by using stand-
by to get zero noise and still use hddtemp as a daemon). There *might*
be problems with (a) getting temperature in stand-by and (b) sleep mode
in general, but I can't say whether thats maybe simply a result of
technical standards in place rather than a software issue.

Thanks for having taken and taking care for the issue!

Version info: current, patched Ubuntu 12.04.1 LTS, AMD64.

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https://bugs.launchpad.net/bugs/160621

Title:
  running hddtemp causes unnecessary disk activity

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