stop ata drive rotation after umount

[Michel Le Cocq]

is it impossible ?

Michel Le Cocq a écrit :
> Hello,
>
> I want to stop the rotation of my ata drive after umounting them and
> restore it back juste before the mount process.
> I try to do this on some backup disk which are "normaly" not mount and
> only for restore and backup process.
> If I can stop the rotation of these disk, I can obtain a reduce of the
> temperature and noise inside my box :-)
>
> thanks for your help
>
>