[mythtv-users] Power bill vs SchedulesDirect bill

[David Rees]

On 9/19/07, jedi at mishnet.org <jedi at mishnet.org> wrote:
> > Look into "laptop-mode" or "noflushd", mount your filesystems "noatime",
> > and "nodiratime".  I.e. go read everything you can about saving power on
> > laptops and apply it to your backend.  It's possible to get Linux to spin
> > the drive down, it just takes some effort.
>
> The problem with this is it also tends to cycle down the cpus. I have
> found that to be a problem in terms of load average, cpu utilization,
> job response time and playback response time.
>
> The last thing I would recommend is enabling laptop-mode on any mythtv
> system.

None of those items affects the CPUs at all. laptop-mode only tells
the kernel to delay writes to disk as long as possible which helps
keep the disks from waking up.

http://www.kernel.org/doc/Documentation/laptop-mode.txt

-Dave