Not sure if somebody of the bug reporters is affected by this as well, but I
found yesterday that a wrong advance power manangement level can prevent
spindowns:
-B Get/set Advanced Power Management feature, if the drive
supports it. A low value means aggressive power management and a high value
means
better performance. Possible settings range from values 1
through 127 (which permit spin-down), and values 128 through 254 (which do not
permit spin-down). The highest degree of power management is
attained with a setting of 1, and the highest I/O performance with a setting
of 254. A value of 255 tells hdparm to disable Advanced Power
Management altogether on the drive (not all drives support disabling it, but
most do).
root@Silberkiste:~# hdparm -I /dev/sdb|grep level
Advanced power management level: 254
root@Silberkiste:~# /etc/init.d/hdparm restart
[ ok ] Restarting hdparm (via systemctl): hdparm.service.
root@Silberkiste:~# hdparm -I /dev/sdb|grep level
Advanced power management level: 64
root@Silberkiste:~#
Kind regards
Rainer
--
Rainer Dorsch
http://bokomoko.de/
