Hi, Sorry for the lag - been traveling, On Mon, 2007-05-14 at 13:18 +0100, Richard Hughes wrote: > On Mon, 2007-05-14 at 12:56 +0100, Andy Green wrote: > > > > If in reality you expected the drive to last 5 years and it was in use > > half that time, spreading the budget of 300,000 starts and stops over > > that period looks like you can afford to do something like 6 an > > hour... > > vs one an hour for the 3.5" drive... > > Cheers for doing that - that's useful to know. David, this makes some of > the discussion with DannyK moot - what do you think about hdd powerdown > from the desktop? Hmm, I think this just needs to happen automagically when g-p-m calls SetPowerSave() on HAL http://people.freedesktop.org/~david/hal-spec/hal-spec.html#interface-device-systempower e.g. you'd have the option in g-p-m for both the "On AC" and "On battery" tabs saying [x] When idle, power down hard disks and peripherals that defaults to [x] for "On battery" and [ ] for "On AC". So as far as I'm concerned the magic just happens in pm-powersave (which is what SetPowerSave() on HAL calls). (I also think it's preferable to avoid using hdparm or sdparm for this; the kernel driver for the hard drive / controller needs to export a power mgmt aware interface that we can easily poke using sysfs.) The key thing here is this: The desktop user only needs to tweak a simple setting (that's all what users care about; "save power or not"), and we can expand the mechanism of what this does in pm-powersave. How about that? David -- fedora-devel-list mailing list fedora-devel-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/fedora-devel-list
