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Date: Fri, 21 Jun 2002 00:01:56 +0200
To: Marek Michalkiewicz <marekm@amelek.gda.pl>
Cc: linux-kernel@vger.kernel.org
Subject: Re: "laptop mode" for floppies too?
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From: Daniel Kobras <kobras@tat.physik.uni-tuebingen.de>
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On Mon, Jun 17, 2002 at 02:34:12PM +0200, Marek Michalkiewicz wrote:

> And, that would be a global sync() not per-device - looks like a hack
> to me.

You can also fsync() block devices to write out the buffers attached to
it.  Slightly less of a hack that way.

> The floppy driver itself controls the motor, so could also somehow
> tell the kernel to write back all dirty data just before spinning down.
> IDE disks can spin down automatically after some idle time, but perhaps
> it would be more efficient if Linux could do that in software instead -
> tell the disk to go to sleep ("hdparm -y") if it has not been accessed
> for too long, but write all dirty data first (without resetting the idle
> timer - possible now that the timer is ours and not in the disk).

Have a look at noflushd (available via sourceforge).  Never used it with
floppy disks, I admit, but the changes should be straightforward.

Regards,

Daniel.
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