Good morning,
this is my question
where can I find the option in ubuntu 10.11 (via GUI or terminal) that allows the OS to turn off the hard disk when it is possible? I remember that there was an option like this in the Power Management window on ubuntu 11.04, but I can't find it in ubuntu 10.11.

Can anyone help me?

Thanks in advance (and excuse me for my bad english, but I'm not british/american, I'm Italian )