Re: HDAPS, Need to park the head for real

Jens Axboe
2005-08-19T06:33:56Z

On Thu, Aug 18 2005, Pavel Machek wrote:
> Hi!
>
> > > Please make it "echo 1 > frozen", then userspace can do "echo 0 > frozen"
> > > after five seconds.
> >
> > What if the code to do "echo 0 > frozen" is swapped out to disk? ;)
>
> Emergency head parker needs to be pagelocked for other reasons. You do
> not want to page it from disk while your notebook is in free fall.

It's still a very bad idea imho, what if the head parker daemon is
killed for other reasons? The automatic timeout thawing the drive is
much saner.

--
Jens Axboe