Some time ago I discovered two HPE BL490c Gen9 servers with iLO in “Degraded” status. From diagnostic page it was visible that error was related with Embedded Flash/SD-CARD – “Embedded media manager failed initialization”. The Login banner was also showing a warning.
With ILO4 firmware 2.61 or newer there is a “Format” button to format the embedded Flash/SD-CARD. If you format the embedded Flash/SD-CARD the iLO will reset and and hopefully the error is fixed. It worked on one of my servers. The other one was still showing error after iLO reset. Then I performed a power-cycle to the blade server using E-FUSE process. Logged into Onboard Administrator and issued “server reset <bay_number>”. After the server re-started the error about the iLO disappeared.
Advisory from HPE regarding the issue – https://support.hpe.com/hpsc/doc/public/display?docId=emr_na-c04996097