Kill the power faster than poweroff?

David Mathog mathog at
Thu Sep 11 12:53:43 EDT 2003

> How about
>      halt -p -f
> or
>      poweroff -f
> ....
> I tried it and it takes 3s instead of 20 or more :-)

You're right, that brings it down quickly, which is what
is needed here.  However it doesn't do so cleanly, neither

  % sync ; poweroff -f

In both cases there were inodes to fix and the disks were
rescanned on the next boot.  Which is fine - much easier
to handle that sort of problem than fried hardware.


David Mathog
mathog at
Manager, Sequence Analysis Facility, Biology Division, Caltech
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