BIOS update on Thinkpad t470s

To update a modern thinkpad on linux, you can download a BIOS update as a bootable CD image. This cannot be used directy for a USB. We first need to use the ‘geteltorito’ tool. In debian, this tool is on the genisoimage package.

> sudo apt-get install genisoimage

Then we can use the tool to create a bootable iso:

2 -o bios.img n1wur26w.iso
sudo dd if=bios.img of=/dev/[sdb,sda...etc] bs=1M

To boot from this USB key you NEED to setup UEFI boot on the startup menu on the BIOS (Normally I have ‘Legacy only’, and with that option on the USB key does not boot)