[PLUG] Zot's power cycling for Linux

[Trench Shoring]

I have a Cybex reboot device that hooks to an external modem

For sale.

At 11:19 AM 4/26/2004, you wrote:
>On Fri, 2004-04-23 at 19:54, Keith Lofstrom wrote:
> > Zot writes:
> > > I have a remote machine that is locking up.  I want to be able to shut
> > > power down for 5 minutes, and then power back up.  The power supplies
> > > have a timeout reset on them, so flicking it on and off will not
> > > work....
> >
> > Have you considered a watchdog timer board?  These run around $100, IIRC,
> > and will do a hard reset of the machine if they are not tickled by code
> > every so often.  I was having problems with a machine back in my BSDI
> > days, I got a such a card, wrote a BSDI driver based on the supplied Linux
> > driver,  and it worked!  When the machine went zombie and stopped tickling
> > the watchdog board, it would wait 30 seconds and then do a hard reset.
> >
>
>The problem is that this server is still in Oregon and I am not.  Adding
>boards is difficult, but unplugging is easy :)
>
>The syustem is a dell power edge, so I wonder if it has a watchdog built
>in.
>
>
>
> >
> > Another alternative would be to temporarily attach a second linux box
> > with a signal from the parallel port controlling a 5V relay.  You could
> > have two machines control each other this way.  Finally, a task slow
> > enough to run on a 386-12 machine!  That's 0.012 GHz for all you young
> > people.  :-)
> >
>
>Well that is what I was looking for this weekend.  I remember these from
>10-15 years ago and they were $30-70 to connect to a modem.  Now I am
>seeing them for $160-250
>
>What I am now wondering is the UPS.  I have found I can shut off a UPS
>via a serial command.  What I do not know is what happens next.  The
>Dell requires that I power off for 5-10 minutes, there's a "protective"
>delay on the power supplies.  If I tell a UPS to power down, what
>happens?  Does it power down until I tell it to power up?  Does it power
>down until line power is back on?  In this case line power is already
>on...
>
>I was hoping for a solution in the $30 range.  I could grab a relay,
>attached to a parallel port, then to a sock, and put it all in a
>junction box and ship it, but that sounds a bit iffy to rely remotely.
>
> > Keith
> >
> > P.S.  Dollars to donuts this thread gets hijacked without changing
> > subject lines.
>
>I bet you were thinking bicycling?
>
>--
>
>
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