Comment 14 for bug 160621

*When*I*posted* the report (6 month ago), I used Ubuntu 9.10 (packages always updated to current versions). In the meantime I've upgraded to Ubuntu 10.04. So the statements regarding 9.10 might be wrong (even though I don't think so).

== Common behaviour with both Ubuntu 9.10 and 10.04 ==
I do manually send my big storage disk to standby when I don't need it. I use "hdparm -y /dev/...", which causes the disk to spin down.

# hddtemp /dev/... => gives temperature when disk is *active*.
Starting hddtemp daemon spins up any standby disk (disk is than active) around once a minute.
The sensors applet simply does not show any entries for the disks if the daemon is not running (and thus standby disks keep standing by).

== Situation with Ubuntu 9.10 ==

# hddtemp /dev/... => spins up standby disk and gives temperature

== Situation with Ubuntu 10.04 ==

# hddtemp /dev/... => says 'disk is sleeping' when standby, but NO temperature.

Version information for 10.04:
Linux Kernel 2.6.32-24-generic #42-Ubuntu SMP
Gnome Sensors Applet 2.2.3
hddtemp 0.3-beta15-45
(all up-to-date)

== Summary ==
The situation with hddtemp improved regarding with manual usage on sleeping disks. Still, it is not possible to read temperature data when the disk is in standby (which should be possible in this state, as I understand it). In daemon mode, standby disks get constantly called into active state.

Please note, that I don't send the disks into sleep state.