Can you check iDRAC FW version and license you have on iDRAC? License could be Basic, Express, Enterprise or Datacenter. Can you update latest PSU, BIOS and iDRAC FW on the server and check the behavior? You can also check PSU redundancy policy using racadm command. For this you can SSH to iDRAC IP and run below command racadm get system.ServerPwr
I installed a brand new PowerEdge R340 server in early December. Over one month, it has rebooted five times for no apparent reason. The last time, yesterday, there was a very short power fluctuation which made one UPS beep; the server rebooted. So, the reboots appear to be power related. The server has redundant 550w power supplies, each connected in an APC XS1500 UPS. I don't understand how this setup could be this sensitive to a power fluctuation, unless both UPSs are fried. Also, I disconnected one power cable from one UPS to connect both power cables in the same UPS just a few minutes ago and the server rebooted. Shouldn't the second power supply have taken over powering the server? Thanks in advance for any pointer you might give me.
Power supply issues?