[plug] UPS's

[Matt Kemner]

On Mon, 6 Nov 2000, Colin Rothnie wrote:

> Another thing it does that many UPS software packages
> don't do is allow one server to be the master UPS "monitor" which transmits
> a shutdown message to other machines on the same UPS when it is time to go
> down.

I wonder how difficult it is to spoof the "power is failing" package
and therefore shut-down your entire network from remote...

> There is generally a few seconds where if the power comes back on, the
> UPS stays up but the server is down. 

Rather than shut down the server completely, why not go to single-user
mode and remount the drives read-only? That way the disks are safe, but
the server can keep monitoring the UPS in case the power comes back.

 - Matt