stop ata drive rotation after umount

[Michel Le Cocq]

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

-- 
Michel Le Cocq
Administrateur Reseau Laga-Lipn