I am at a loss and looking for advice. We have an HP C7000 blade enclosure hooked to two Cyberpower PR5000LCDRTXL5U UPS that are in turn hooked to auto switching generator. The generator also monitors power for +/- 10% drop and will kick on beyond that. I have now had three instances where All hosts in the enclosure are in a failed power down state. Upon coming into the office I Restart each blade and they will operate correctly. The enclosure reports power failure. By all accounts this should not happen.
Our overnight employees are telling me that we had a brown out at 2:30am and looking in the logs of the UPS I saw no indications of brownout. However, the logs were set to 1 hour intervals so i reduced that to 10 min intervals. Regardless the UPS AVR should have cleaned the power. I am unsure where the failpoint is here bu I suspect...