When you use the Microsoft IPMI (Intelligent Platform Management Interface) driver to flash hardware firmware in Windows Server 2003 R2, you receive several time-out error messages in the System event log that are similar to:
Event Type: Warning
Event Source: IPMIDRV
Event Category: None
Event ID: 1004
This behavior may occur when a large firmware image is used to flash the hardware device, causing the hardware to become inaccessible for an extended period of time. You may receive hundreds of time-out messages.
You can safely ignore these time-out messages, but NOT any more severe or fatal messages.