Can you check Power Supply Redundancy Policy? You can check this in iDRAC GUI "Power Configuration" section on "Configuration -> Power Management" page. If it is in "Not Redundant" mode server can shutdown when one PSU fails. If it is in redundant mode server should not shutdown when one PSU fails. 

Thanks, Shine. I successfully installed iDRAC (with help from Dell tech support). However, I cannot see a Power Configuration option under Configuration / Power Management. All I see there is "Power Control" which offers 5 ways to down the system in a dropdown list.

I searched for Power Configuration and found nothing. A search for "redundant" took me to the BIOS settings and "redundant OS control".

Is this option possible somewhere else in iDRAC?

Benoît

Hi,

In iDRAC Web interface, go to Configuration > Power Management > Power Configuration. 2. Under Power Redundancy Policy, select the required options

You can configure the power supply options such as redundancy policy, hot spare, and power factor correction. Hot spare is a power supply feature that configures redundant Power Supply Units (PSUs) to turn o depending on the server load. This allows the remaining PSUs to operate at a higher load and efficiency. This requires PSUs that support this feature, so that it quickly powers ON when needed. In a two PSU system, either PSU1 or PSU2 can be configured as the primary PSU. After Hot Spare is enabled, PSUs can become active or go to sleep based on load. If Hot Spare is enabled, asymmetric electrical current sharing between the two PSUs is enabled. One PSU is awake and provides the majority of the current; the other PSU is in sleep mode and provides a small amount of the current. This is often called 1 + 0 with two PSUs and hot spare enabled. If all PSU-1s are on Circuit-A and all PSU-2s are on Circuit-B, then with hot spare enabled (default hot spare factory configuration), Circuit-B has much less load and triggers the warnings. If hot spare is disabled, the electrical current sharing is 50-50 between the two PSUs, the Circuit-A and Circuit-B normally has the same load. Power factor is the ratio of real power consumed to the apparent power. When power factor correction is enabled, the server consumes a small amount of power when the host is OFF. By default, power factor correction is enabled when the server is shipped from the factory

Shine,

The version of iDRAC that is installed is 4.20.20.20(Build 34). The license is Basic Management.

I have conducted additional tests on the server. I was able to unplug (and re-plug) each PSU in sequence without the server going down. So, at this point, I see no problem with the server. It is likely that I have an issue with one of the UPSs.

Benoît

Did you ever figure this out? I had an issue whenever my UPS's went on generator for a few seconds. It ended up being about the way the two ups's were configured to operate in parallel. It was ok if one of them recovered first but if the second one came back first the first one wouldn't follow properly or something. Anyway are your two UPS's truly totally separate or are they designed to parallel?

Hi, thanks for choosing Dell. I'm aware your questions is for another user here but have you tried something like this as well?

https://dell.to/3kXMxJy

See my message above from January 22. I followed the Dell instructions and got it working. My 2 UPS are totally separate and each connect to one of the power supplies.

Hi,

probably I miss understood you but it seems a failure with the UPS and not with the server correct?

Did you use the APC XS1500 UPS, too?

Did you try to contact Vendor, too?

because it makes sense to involve, in this case, the Vendor to get the best-qualified answer.

Regards Martin.