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

[Jon Escombe <lists@dresco.co.uk>]

Jens Axboe wrote:

> On Thu, Jul 07 2005, Shawn Starr wrote:
>  
>
> > Model: HTS548080M9AT00 (Hitachi)
> > Laptop: T42.
> >
> > segfault:/home/spstarr# ./a /dev/hda
> > head parked
> >
> > Seems to park, heard it click :)
> >    
> Note on that - if the util says it parked, you can be very sure that it
> actually did as the drive actually returns that status outside of just
> completing the command.
>  
It's worth noting that you'll need the libata passthrough patch to make 
this work on a T43..
However, with this patch I'm getting the "head not parked 4c" message, 
but I can hear the click from the drive.. It takes around 350-400ms for 
the command to execute, but when repeated, it drops to around 5ms for a 
short while (with no audible clicking), before reverting to original 
behaviour after a few seconds.
The clicking and the variation in execution time lead me to think it is 
parking, but not being reported correctly?
Regards,
Jon,


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