I have just uploaded to incoming the noflushd daemon.
Description: allow your laptop's hard disk to spin down
Noflushd is a daemon that spins down disks that have not been read from
after a certain amount of time, and then prevents disk writes from
spinning them back up. The effect is that the hard disk in your laptop
actually spins down, saving you battery power, and shutting off the
loudest component of most laptops.
This works much better than the version of modile-update I have been working
on. I think it should go in task-laptop.
see shy jo