Subject: Re: Hard disk blues on laptops.
To: Christos Zoulas <>
From: David Laight <>
List: current-users
Date: 03/19/2007 21:22:33
On Tue, Mar 20, 2007 at 08:12:49AM +1100, Daniel Carosone wrote:
> I must say I'm confused, though - we already send a cache sync to the
> drive on last close, we could just also send the equivalent of "atactl
> wd0 idle" (or standby) to it as well at the same time. That is
> supposed to prepare the drive for poweroff, and will probably park the
> heads gracefully.  Did we have this conversation already, it seems
> rather familiar.

I'm also sure I remember something about modern drives using the
rotational energy of the platter to withdraw the heads in the event of
poewr failure - and that was years ago.


David Laight: