You may receive an error on the front panel of your Dell PowerEdge saying that the SEL is full and needs to be cleared. This issue needs to be addressed because the system may have an error in the future that will not be logged in the System Event Log. If the error is not logged, it may be difficult to track down future problems on the system.
There are multiple ways to clear the SEL. It can be done through OMSA, iDrac, or from BIOS.
Clearing the System Event Log (SEL) via BIOS :
During POST, on the screen with the Dell splash screen logo, press F2 to enter the System Setup
On the System Setup Main Menu press iDRAC Settings
Click System Event Log
Press Yes on the Clear Records line
Confirm the changes – press Yes