Public bug reported:
Binary package hint: pm-utils
IMHO, the power saving defaults in /usr/lib/pm-utils/power.d/harddrive
are much too aggressive. The below mentioned battery values cause my
hard disk to spin down after approx. five(!) seconds. This produces much
more wear on the hard disk than it's worth for energy saving.
Also, this should be documented (not only what it does, but why those
values were chosen) and user changeable. If the default is so
aggressive, it also should be adjustable user-friendly, i.e.
graphically.
Defaults as per pm-utils 1.4.1-1:
* hdparm -S (spin down): AC 0 (disable), battery 6 (should correspond to
6*5 = 30 seconds, but see above)
* hdparm -W (drive write cache): AC 1 (enable), battery 0 (disable). Why
would we need to disable write caching on battery -- just for the case
that it runs out of energy?
* hdparm -B (advanced power management): AC 254 (minimum saving),
battery 1 (maximum saving). Too aggressive IMHO, causes my HD, provided
spin down (-S) is disabled, to frequently unload the heads (SMART load
cycle count is skyrocketing).
* hdparm -M (acoustic management): AC 254 (maximum performance), battery
128 ("max quietness" as commented on in [...]/power.d/harddrive). Don't
know, may be appropriate.
I'd please like to hear the opinions of the maintainers.
Regards,
Björn
ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: pm-utils 1.4.1-1 [modified: usr/lib/pm-utils/power.d/harddrive]
Uname: Linux 2.6.35-999-generic i686
Architecture: i386
Date: Tue Aug 3 14:21:44 2010
PackageArchitecture: all
ProcEnviron:
LANGUAGE=en_GB:en
PATH=(custom, no user)
LANG=en_GB.utf8
SHELL=/bin/bash
SourcePackage: pm-utils
** Affects: pm-utils (Ubuntu)
Importance: Undecided
Status: New
** Tags: apport-bug i386 maverick
--
too aggressive hard disk power saving defaults
https://bugs.launchpad.net/bugs/612969
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
--
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
