Browse Prior Art Database

Method for Network Power Event Announcement and Detection

IP.com Disclosure Number: IPCOM000112776D
Original Publication Date: 1994-Jun-01
Included in the Prior Art Database: 2005-Mar-27
Document File: 2 page(s) / 44K

Publishing Venue

IBM

Related People

Jones, CA: AUTHOR [+2]

Abstract

Disclosed is a method for the announcement and detection of network power events.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 68% of the total text.

Method for Network Power Event Announcement and Detection

      Disclosed is a method for the announcement and detection of
network power events.

      An Uninterruptible Power Supply (UPS) is a device that provides
emergency power to an electronic unit when the normal AC power supply
has failed or is irregular.  This device is critical to network
operations, especially in the case of network server machines.  Most
network software vendors provide a program to monitor signals from
the UPS, and, if necessary, perform operations on the host computer
to prevent data loss.  The UPS device and the host computer are
attached by two cables:  the first cable is the power cable, and the
second cable is the communications cable.  The latter cable is
connected to a serial port on the host computer.

      Many UPS devices available today provide extended power support
when normal AC power has failed.  As such, each UPS device can
support multiple attached units.  However, only one of these machines
can be attached to the UPS using the communications cable.  This
means that only one machine can notify the UPS service about power
events and allow it to be shut down correctly, if required.

      The IBM OS/2* LAN Server UPS service was modified to solve this
problem.  The UPS service broadcasts a network "alert" when there are
power events so that interested parties are kept notified.
Configuration capability was provided to allow the UPS service to
determine p...