[ltp] IBM Harddrive protection

[Pbt]

Le mer 05/01/2005 à 18:51, Eben King a écrit :
> On Wed, 5 Jan 2005, VaibhaV Sharma wrote:
> 
> > Pbt wrote:
> > 
> > >Le mer 05/01/2005 à 17:42, Emmanuel Doguet a écrit :
> > >  
> > >
> > >>PH> From what I've read on this list, there's no support for the HD protection
> > >>PH> under Linux. Furthermore, IBM has not released any information so the linux
> > >>PH> community could build a driver itself...
> > >>
> > >>So the protection not work ? It's not an hardware system who work with
> > >>no  drivers  ? 
> > >>
> > >No : you can easily check it listening the hard drive noise when
> > >shocking it.
> > 
> > Apart from being shock sensitive, the hdd protection software on my t41p 
> > shows a 3d model of the machine. You move the machine back and forth and 
> > it moves the model in 3d. So there is some kind of motion sensing 
> > mechanism and not just shock sensors.
> 
> I read a description on IBM's web site.  There's a 3D accelerometer (or 
> three 1D accelerometers at right angles), and the driver integratrd 
> the output(s) of those to compute the position of the laptop.
> 
> Since the accelerometers are physical devices, they're not infinitely 
> sensitive.  Thus, if you move the laptop at below their minimum sensitivity 
> or above their maximum, it won't know where it is.  This may be hard to do.
I don't think that developing this kind of driver is very hard if you
just want to stop/resume the HD. 
But developing an advanced one (with monitoring by example) would be
much more difficult. 

Does anyone know if IBM plan to release detailed technical informations
about APS soon ?