tuning laptop disk access (was: XFS enabled Debian 3.0r1 powerpc installer)
On 03/08/2003 at 20:23, Paul van Tilburg wrote:
> I read about noatime ext3 mount options and stuff, but such an option
> for my root fs doesn't feel right. What experience do you guys
> have with suspending the disk (and resulting laptop-usage increase)
> in a iBook/Powerbook?
Journaling fs do more disk writes than non-journaling ones, but, as
Gaudenz said before, that's not a big deal since laptop-mode delays
those writes.
Me, as him, also use cpudyn and, combined with laptop-mode, the disk
remains in standby mode for quite long periods of time.
The "problem" in spinning down disks are disk reads. They can not be
delayed (as disk writes are by laptop-mode). So, what you have to do is
to tune the daemons you have on your system so they do not do
unnecessary disk reads. A typical example is postfix checking the queue
every few seconds, or ntpd writing its statistics.
This article has some good points for tuning these things in an iBook
(or another kind of laptop):
http://bulmalug.net/body.phtml?nIdNoticia=1511
Best regards
--
Kiko
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