I have already explained elsewhere how to update the BIOS of this very same motherboard. Today I am going to explain how to update the IPMI firmware. The procedure is very similar, you just need to download an extra external application.
1.- Format a USB pen drive as FAT32 (this erases all the data on the drive).
2.- Use the program UNetbootin to copy a FREEDOS system to the USB pen drive.
3.- Download the socflash tool from Aspeed: http://upload.aspeedtech.com/SOC/1117450218540864.zip and extract it somewhere (extract also the rar file corresponding to the SocFlash tool).
4.- Download the IPMI firmware file from Tyan: http://www.tyan.com/support_download_IPMI.aspx?model=S.S7025 and extract it somewhere.
5.- Create a new directory in the USB pen drive and copy into it both the SocFlash executables and the firmware file.
6.- Reboot and, while memory checking, press F11 in order to be able to choose the booting drive, when prompted choose the USB drive.
7.- Type C: and go into de directory where you have the firmware and the flashing tool (dir to list files and cd to change directory).
8.- Type socflash 70250102.i01 backup.old (replace 70250102.i01 with whatever your firmware file is called).
9.- If there are no warning messages you are fine. Reboot.
USUAL DISCLAIMER: This method worked for me and it is in this blog just as a reminder for myself. I do not suggest anybody else should try it and if you do so you do it at your own risk. The important bit was taken from this comment.
koroshitchy
January 11, 2012
A newer version of the SocFlash tool is available (untested) : http://www.aspeedtech.com/support.php