Sophos UTM install from USB
In most cases, the UTM-hardware or a self-build device boots automatically from USB, otherwise you need to choose the boot device at start or change the boot priority. After you boot from the USB stick and hit enter to start the installation, you will get the error “install.tar wasn’t found on the installation media.”:
install.tar-problem
this is because the installation system doesn’t mount the usb device as an install medium. To do this, restart your hardware, boot from USB stick again and press Alt+F2 at the installation process. Now type in the following command to mount the usb device as source for install files (while in bash, the installation is going on, at first step the HDD will be formated so you have only a several time to do this before the installation wants to copy the installation-files):
mount /dev/sdb1 /install
press Enter and leave the bash with Alt+F1. The installation will work now.
Quelle: networkguy.de/?p=728
XG: (Rufus ISO Installer)
***NOTE: to prevent banging your head against the wall, when you click Start on Rufus it will ask you if you want "ISO (recommended)" or "DD"