Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))

[Arjan van de Ven <arjan@infradead.org>]

> > This is exactly what I said. Use hdparm to make the HD park 
> > inmediatelly. I did send the email to the HDPARM developer, but he never 
> > replied. I asked him what would be the best way to make the HD park with 
> > no exception and then let it come back 5 or 10 seconds later.
> 
> IIRC, you don't have to do anything to wake up the drive after a
> STANDBYNOW command, if you want to be on the safe side you just issue an
> IDLEIMMEDIATE. So your code will look something like:

the problem for this will be that this app will also want to prevent ANY
io going to the disk for a few seconds.

I mean, what use is parking the head if you notice the laptop falling,
when the kernel submits IO to it and wakes it up again before it hits
the ground :)


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