Hello. The IPMI acts as interface between BMC and the OS; that includes the blade servers in their communication. The event ID 1004 IPMIDRV implies that the communication between the blades and the enclosure is degraded. Shut down the chassis and reseat the blades and observer whether the warning persists.
I am looking at a reported issue on two M1000E enclosures. The support function is refusing to take on these servers, saying they are concerned by a warning in the windows logs," event ID 1004 IPMIDRV The IPMI device driver attempted to communicate with the IPMI BMC device during normal operation. However the communication failed due to a timeout. You can increase the timeouts"  The error is happening on 14 servers. It is fairly infrequent, ranging from once per month to 6 times per month depending on the server. -should I be concerned about this warning? -if so, my hardware details are as follows, any advice or checks I can make is appreciated. M1000E enclosure, V5 firmware Poweredge M620: Idrac 20.10.10.10, CPLD 1.07, BIOS 2.5.2 Network: 2 poweredge IO/agregator 10GB E KR, hardware A04, coprocessor 11, firmware 9.4
M620 servers, warning in logs, event ID 1004 IPMIDRV