Peter Wemm wrote:
> Terry Lambert wrote:
> > Mike Silbersack wrote:
> > > 1. Have the ata driver leave the write cache setting
> > > alone by default, providing a sysctl which can cause
> > > disabled or enabled if requested. When the default is
> > > allowed, put something in dmesg which says "Note: Write
> > > caching may be enabled. See ata(4) for the reliability
> > > implications of this."
> >
> > You need to look at the code; it would be relatively hard
> > to make this runtime tunable instead of boot-time tunable.
>
> False. It is actually very easy to change at runtime if it
> is done at a convenient time. We have had patches kicking
> around for something like 6 months now that do this.
The patches don't (and possibly can't) do enough to ensure
a smooth transition. Among other things, they would have
to turn off soft updates.
Please see my other post on this subject.
-- Terry
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