My X260 only runs OpenBSD and has no CD driver. But I still need to upgrade its BIOS from time to time. And this is possible using the ISO BIOS image.
First off all, you need to download the “BIOS Update (Bootable CD)” from the Lenovo Support Website.
Then you need to install the
# doas pkg_add geteltorito
Extract the bootable image from the ISO file:
# doas /usr/local/bin/geteltorito -o Downloads/bios.img Downloads/r02uj73d.iso Booting catalog starts at sector: 20 Manufacturer of CD: NERO BURNING ROM VER 12 Image architecture: x86 Boot media type is: harddisk El Torito image starts at sector 27 and has 43008 sector(s) of 512 Bytes Image has been written to file "Downloads/bios.img".
Then copy the boot image onto the USB stick:
# doas dd if=Downloads/bios.img of=/dev/rsd3c 43008+0 records in 43008+0 records out 22020096 bytes transferred in 130.316 secs (168974 bytes/sec)
Now, reboot the system, hit “
Enter” on logo screen and “
F12” to boot from the USB stick. Follow the wizard and you’re done.
When you’re back to OpenBSD, you can check that the BIOS is now updated.
# dmesg | grep 'bios.*version' bios0: vendor LENOVO version "R02ET73W (1.46 )" date 01/08/2020