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Chapter 15: Network/OS/Server AdministrationOther TasksThe uninterruptible power supply (UPS) that you use should be monitored by a controlprogram. This program, when triggered by a power event, records the event and initiates ashutdown process of the R/3 environment (R/3, the database, related applications, and theoperating system), and finally the server. In addition, most UPSs have a self-test andcapacity calibration function. The results of these tests are logged. Specific data loggeddepends on the program and the UPS.You need to review the power events that triggered the UPS control program.While the UPS protects the server, the control program should be recording power eventssuch as power dips, brown outs, power failures, etc. This recording could help you or thefacilities person solve electrical problems in the facility. For example, a pattern of powerdips or outages may indicate a problem elsewhere in the building.You need to verify that: The UPS is functioning The self-tests completed successfully There is sufficient capacity in the batteriesThe batteries in the UPS must be periodically replaced. If the batteries are low, the capacitytest will indicate that the batteries do not have sufficient capacity to shutdown the systembefore failing.Review the log for the UPS control program.Verify that your UPS shutdown process works. A shutdown process is an automated scriptfor the UPS to shut down R/3, the database, other applications, the operating system, andthe UPS.This check verifies that the entire shutdown process works as planned and documented.When there is a power failure, the R/3 environment should be shut down in an orderlymanner. There should be sufficient reserve in the UPS to reach the end of the shutdownSystem Adminstration Made Easy15–13