Subject: Installing a UPS for a NetBSD server... software and procedures?
To: None <netbsd-users@NetBSD.org>
From: Gilles Gravier <Gilles@Gravier.org>
Date: 04/20/2007 08:20:16
OK... This night, I've had the last power failure that I want to hit my
server. It took place while sup -s -v was doing its work, which means
that the /usr/pkgsrc directory was corrupted when the machine died and
that I had to manually fsck -y that partition before mounting it.
Since I didn't find a stable journalized filesystem for NetBSD (I'm
still *VERY* open to suggestions on that one), I'm going to set up a
UPS. Just one that supports one tiny server (i.e. 200 to 300W maximum)
for say 10 minutes... nothing fancy. But I want the machine to be able
to do a shutdown... and I want it to come back up by itself when power
I have 2 questions about this...
1) What UPS work well with NetBSD? I see in the pkgsrc many pieces of
code supporting UPS systems. What are your preferred ones? For what
reasons? What package do you use to monitor the UPS and trigger the
2) How does your UPS handle bringing the machine back up? My BIOS is
configured so that on power outage, when power comes back up, the
machine boots... but how does the UPS handle this? Since it's probably
going to provide 220v to the power output for a long time if the server
isn't drawing power from it, how does it trigger the reboot of the
machine it's protecting?
Thanks in advance for your help,