Borja Marcos wrote:
I think this will need to be tailored to the exact type of "mishap" one wants to protect against.


I think that the main purpose of the shock detection system is to allow data to be recovered from the disk in case the laptop is broken. By parking the heads asap you can avoid damaging the plates with the head.

At least that's what I read. The disk won't be necessary usable after being dropped, but at least the plates should be readable.

no,
the aim is to detect the LACK of acceleration as the laptop goes into freefall.
You have about 1/4 a second to get the heads in once you detect that you are 
falling.

Quick by human standards but an eon in computer terms.


In that case, priority number one would be a fast parking of the head. However, it could lead to a worst-case data loss with softupdates and the disk cache, isn't it?




    Borja.

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