Configuration of the Shutdown Time of a UPS with smartups

Support knowledgebase (tsieden_smartups-shutdown)
Applies to

SuSE Linux: Versions since 7.2

Situation

You have configured your UPS as described in the SDB article "Installing a UPS with smartups" (http://sdb.suse.de/en/sdb/html/tdenis_smartups.html), and you want your computer and subsequently your UPS to shut down after a specified period of extended power failure.

Background

Normally the UPS shuts down the computer if the power failure persists AND the battery charge has reached or even fallen below a critical value. This value depends on the manufacturer and the UPS type, and is adjustable in some models. In most cases this procedure is adequate; however, in some cases, especially if the shutdown procedure is very complex, the battery capacity may be exhausted before the shutdown procedure is completed.

Starting from version 0.44.3 of the smartups package (included in SuSE Linux version 7.2), it is possible to trigger a so-called forced shutdown that additionally notifies any existing slave systems about the power failure and shuts them down if necessary. The desired effect can be achieved in combination with a timer that starts when a power failure occurs.

The following procedure describes the configuration of the master host (being connected directly to the UPS); slave systems are not taken into consideration in this configuration.

Procedure

See also:
o Installing a UPS with smartups

Keywords: UPS, SMARTUPS, POWER, APC

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SDB-tsieden_smartups-shutdown, Copyright SuSE Linux AG, Nürnberg, Germany - Version: 01. Feb 2002
SuSE Linux AG - Last generated: 04. Feb 2002 by tino (sdb_gen 1.40.0)