Intel One-Boot Flash Update Utility User Guide

Intel
®
One Boot Flash Update Utility User Guide
2
When Updates Take Effect
Starting with S1200BT, S1400, S1600, S2400, S2600, and S4600 platforms, the Intel
®
OFU
utility updates the FW and BIOS images passively via BMC controller or BIOS. The utility hands
off the required image files to BMC Controller or to BIOS. After verification of the images
(signature verification and/or authenticity verification), the Base Board Management
Controller FW or BIOS, would update the images by their own. After firmware update the
firmware will immediately switch to updated firmware; while the effect of the BIOS update
would be seen in the next reboot.
FRU updates only have one firmware area so the updates will take effect immediately when
the utility executes. In some cases, the System BIOS, BMC FW, SDR updates are programmed
into their respective secondary flash areas and the utility sets an internal flag in the BIOS and
BMC to indicate that the update occurred. After a system reset, the newer version of the
System BIOS, BMC, and SDRs are validated and then activated.