harddrive spins down and up again after 5s
hi,
my freshly installed debian wheezy is spinning the harddrive up and down
all the time
gnome is running for a few minutes when it happens the first time, drive
noise goes away and it is still for about 5s. then it spins up right after.
hdparm -B /dev/sda
says that its set to 127 which means that spinning down is allowed but i
dont know after which time.
hdparm -S xyz /dev/sda
is apparently used to set the drive spindown time, spindown afer yxz
seconds with no disk access to save power
cant read the -S value from the drive, option needs a time argument.
setting it to 252 says that spindown will occour after 21minutes of a
idle harddrive.
with this value the drive stays on and the constanst spinup/down is gone.
but it would be nice to still have the drive spindown and stay off for
some time for power consumption,
this is what i observed so far:
1.
at install time the "laptop" option from tasksel was preselected and
installed
- shouldnt this install the laptop-mode-tools? because it doesnt.
2.
when laptop-mode-tools are insalled the drive still keeps spinning up
and down constantly
ive read in the config that the drive is supposed to go out and writes
to the drive are buffered so that when power fails one would loose data
but in the greater sheme battery live would be preserved.
so how do you get laptop-mode-tools to work or how would you
troubleshoot why it doesnt?
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