https://bugzilla.novell.com/show_bug.cgi?id=816388
https://bugzilla.novell.com/show_bug.cgi?id=816388#c22
--- Comment #22 from Moritz Duge 2013-06-12 07:49:39 UTC ---
Sorry for that, but it's probably my fault:
=== THIS IS ABOUT TWO DIFFERENT BUGS! ===
Probably I should have made two bug-reports from the beginning on. So should we
split them now? Please do so if you think it's a good idea (I'm not very
experienced in bug reporting).
BUG 1:
I think easy to find a good fix.
My notebook hdd and other notebook hdds I saw, park their heads because of the
"APM_level" which can be safely fixed using /sbin/hdparm
I think openSUSE it responsible for this value and set's it at some point while
booting and coming back from suspend2disk (more details see my first message).
Also changing this value won't influence the disk when not running with
openSUSE, because (as far as I know) the value reset's after powercycling.
BUG 2:
I think hard to find a good fix.
My WD green hdds park their heads after 8 seconds because of the green-hdd
specific "idle3" value. This value seems to be a factory setting of those
disks. On Windows it's not a problem, because Windows doesn't writes back so
often when idle. But Linux does a lot of more writebacks, so the hdd goes to
sleep after 8 seconds and then comes back because of some writeback.
Changing the "idle3" value on the hdd is a difficult choise, because it's a
factory default in the hdd and a change stays persistent after a power cycle.
A maybe better solution would be, to extend the time until writeback in
openSUSE. But I feel that's not so easy and it also brings the disadvantage of
lost writes in case of power-loss.
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