Random Reboot R740

Hello

We have no errors in hardware testing and no explicit events in Open Manage. Do you have any idea what caused this problem ?

If there are no errors or warnings then look at what happened just before the system shut down. Check the hardware log at the time of the shutdown. The hardware log should state what initiated the shutdown. If there is nothing in the hardware log that states what initiated the shutdown then this is a hardware issue.

Thanks

Hi Daniel

Thank you for your update

When you said "Check the hardware log at the time of the shutdown", how I can verify the hardware log ? By Open Mange Essential, iDRAC,...?

Thank you in advance for your answer

Best Regards

When the reboot occurs, i have only this hardware logs:

OEM software event.

C: boot completed.

So that means there's a hardware problem ?

Best Regards

It is under the log section of the iDRAC. It is called the System Event Log in the iDRAC. It is not the same as the operating system's System Event Log. In OpenManage it is listed as the Hardware Log.

Just an idea but set the power options in the bios to Max proformance

Does it hapen when the when the GPUs/ systems are underloading?

Hi

Today I made the changes in the BIOS configuration because the servers had Watt Performance Optimization Profile Settings (DAPC) as the profile settings.

Now the configuration of each node is in custom mode with maximum performance and disables C1E and C-state options.

I hope that will solve the problem.

Best Regards

When the reboot occurs, i have only this hardware logs: OEM software event. C: boot completed. So that means there's a hardware problem ?

No, those are normal messages that occur during system shutdown and startup. You need to review all of the software and hardware logs and cross-reference them at the time the events occur. Until you find something in the logs or diagnostics to indicate what is happening it is just guess work.

Make sure you turn off automatic recovery on failure in the operating system. If the OS is faulting it automatically restarts the system by default.

Thanks

Assumeing the nodes are windows Vm's? if so, set those  to high power mode in the OS AND host OS, are they on the latest firmware?

Also look at the Idrac power/graph see if the systems are useing too much power.

Same issue with a single T430 / Windows Server 2016. No hardware errors, sometime the server reboots two or three time within 5 minutes, sometimes it is ok for ours. For the moment , i just installed the OS, no users, no activity !!!

DELL support asked for hardware test, no problem, so no other answer.

Assuming the firmware is on the latest?

Do you have any add-in cards?

try running the system on OS power optermised or max proformance.

Install open manage

System > main System Chassie

Power managment.

Managment > Profile

Choose

OS power control then apply.

Eluich,

I am having the same problem with R740s that are randomly rebooting. These are out of the box servers that I've applied the latest.drivers from Dell's website. Did changing the BIOS config to max performance resolve your issue?

Thanks,

Mike

We have the same issues on a Citrix cluster of R740's (dual Xeon 6136/128GB)

BIOS: 1.3.7

iDRAC 3.15.17.15

The strange thing is there is like no BSOD or critical in the eventlog on the host. There is also no load. We can't find a way to trigger it since it happens randomly, even an hour of 3dsmax/vray rendering wont do the job.

We took them out of our production environment for now.

Same problem here with a R430. Only started yesterday - reboots for no reason. No indication in logs at all. Not sure if this is a coincidence but did coincide with a Windows update ?

I have the same problem with a R740 that was just added to a Hyper-V failover cluster.  I currently have a case open with Dell.