On 02/05/2016 06:31 PM, Mark LaPierre wrote: > So let me get this straight. You are saying that you can make changes > to the MB ROM/EPROM/whatever hardware the vendor uses, by issuing an > erase command on a hard drive? No, but you can erase the UEFI variables by issuing "rm" on them if the OS presents them as a part of the filesystem, as Linux does. You know, the UNIX design philosophy of "everything is a file"? Not all of the filesystem represents sectors on a hard drive. > You might be able to trash the system on the HD to a point that it is > unrecoverable. I will believe that. > > When you're done trashing the system you just have to reinstall the > system just like you would with a clean new HD. https://github.com/systemd/systemd/issues/2402 On some systems, wiping the UEFI variables renders the system completely unbootable. It shouldn't, but there are some bad UEFI implementations out there. > All that UEFI crap is built into the MB in Read Only hardware. A new HD > does not come with any of the UEFI files or directories already on the > disk. All that is created at the initial install. Blowing them away > with a remove command does nothing to the MB hardware because it's Read > Only hardware. The UEFI configuration is entirely RW.