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

[Jens Axboe]

On Thu, Jul 07 2005, Clemens Koller wrote:
> Hello,
> 
> Just for the records....
> -----
> root@ecam:~$ ./headpark /dev/hda
> head not parked 4c
> -----
> 
> HDD is a desktop Maxtor Diamond MaxPlus 9 120GB
> on a Promise Ultra133 TX2 IDE Controller.
> 
> Well, sure, it's not a notebook HDD, but maybe it's possible
> to give headpark a more generic way to get the heads parked?

This _is_ the generic way, if your drive doesn't support it you are out
of luck.

> Are the commands different per HDD model / manufacturer?
> Then we might need some information to send the proper
> commands to the different types?!

Each drive may have a vendor unique way of parking the head. But for
non-laptop drives, I would highly doubt it.

> And if there is no headpark command, might it be valuable to send
> the HDD a shutdown instead?

That would be the solution.

> PS:
> I'm working on an embedded PowerPC (MPC8540) system which
> will be turned into a high-resolution portable camera in
> the future (with acceleration sensors for the right image
> orientation). Therefore it will likely be another candidate
> for a Drop'n'Park or Drop'n'Stop (tm) feature as are planning
> to put a 2.5" notebook HDD into the cam, too.

Just make sure to choose a suitable laptop drive, then.

-- 
Jens Axboe

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