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Can an IPL start on its own?

Our system shows an unattended IPL starting. We're not sure how or why this IPL occurred. Is there a way to determine how the IPL started and by whom? Will an iSeries start an IPL on its own due to an internal error?
Try looking in the QHST log (DSPLOG) for a PWRDWNSYS command being issued. You should see the log with the syntax similar to: 'PWRDWNSYS command was issues by XXX' where xxx is the user who issued the command. The only time an iSeries will shut down is when there is a problem, such as out of disk space, or it senses a power failure and the batteries are not able to sustain the system any longer. Those are the only two scenarios that I am aware of where the iSeries will shut itself down.


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