Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ncar!boulder!pikes!scpinker
From: scpinker@pikes.Colorado.EDU (Scott C. Pinkerton)
Newsgroups: comp.sys.hp
Subject: Adding a UPS to a 9000/375
Summary: Need Info re: Adding a UPS
Keywords: UPS
Message-ID: <3228@pikes.Colorado.EDU>
Date: 4 Feb 90 21:58:11 GMT
Reply-To: scpinker@pikes.Colorado.EDU (Scott C. Pinkerton)
Followup-To: comp.sys.hp
Organization: University of Colorado, Denver
Lines: 16

I am looking into adding an Uninterruptable Power Supply onto an HP9000/375
and I was wondering who may have tried this, looked into this already.

The investigation that I have done so far indicates that the UPS connects to
the system via an rs-232 interface.  Upon a loss of power the UPS would start
providing power via its battery capabilities, AND it would send some type of
signal/information to the 375 via the rs-232 line so that the 375 knew to
start shutting down the system.  Is it common for the UPS vendor to supply
the software which runs on the 375 -or- is that something left to the user?

I've noticed over the years an entry in /etc/inittab, which is created during
the install of HP-UX, for pf (power fail routines).  What was HP's intented
use of this entry, or recommended method of interfacing with a UPS?

Any help or information would be appreciated.  Scott Pinkerton
scpinker@colorado.pikes.edu