#hard drive
Pete,
20 seconds is a long time to wait… and isn't necessary… about 3 seconds
after the last regular disk activity is plenty. That is about how long it
takes to 'flussh the buffers'. You can see it yourself… copy a file to the
HD, and watch the activity light. It will flash during the copy, stop, then
about 3 seconds later, flash again… after this last flash it's OK to reboot
or power off.
-larry