Public bug reported:
Release: 12.04 (development) maybe 11.10 is affected too?
Hard drive:
Model Family: Seagate Momentus 5400.6
Device Model: ST9250315AS
In recent hdparm version explicit APM values are set in /lib/hdparm
/hdparm-functions. "On AC" value = 254, "on battery value" = 127. This
causes load cycle hell on my disk drive. Even 128 causes the same thing,
so 11.10 seems to be affected too.
Lines in question:
hdparm_options()
{
local WANTED_DISK="$1"
local DISC= DEFAULT= DEF_QUIET= COMMAND_LINE=
# if the below is guaranteed to spawn a subshell, then this next line is
# unnecessary
local OPTIONS OPT_QUIET KEY SEP VALUE
egrep -v '^[[:space:]]*(#|$)' /etc/hdparm.conf |
{
# set our default global apm policy here.
if hdparm_try_apm "$WANTED_DISK"; then
if hdparm_is_on_battery; then
hdparm_set_option -B127
else
hdparm_set_option -B254
fi
fi
There obviously must be some workarounds by setting right values in
/etc/hdparm.conf but I can not elaborate any further.
** Affects: hdparm (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/913050
Title:
Explicit APM values in hdparm-functions cause Load Cycle Count hell
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