Re: HD spin down with hdparm : HD always wakes up !!!

["J. Bruce Fields" <bfields@fieldses.org>]

> Everything is fine with /dev/hdc (/home), but /dev/hda will
> always wake up after a few seconds of sleep !

Try just leaving a tail -f of some of the files in /var/log running in a
window on your desktop while you work.  This will may be enlightening.

One particularly likely culprit: syslogd is started (I think) in
/etc/init.d/sysklogd, and by default it logs a timestamp every 20
minutes; start it with the -m0 option to prevent this (see man syslogd).

Check for cron jobs, too, of course.

---b.