> On Thu, 19 Sep 2019, Jerry Geis wrote: > >> I installed my first UEFI disk yesterday. Seemed to go fine. CentOS 7.6 >> x86_64 >> I then took that disk "out" of that machine and put it another machine - >> it >> seems to not even boot. >> I put the original disk back in that machine and it boots fine. >> >> I put the UEFI disk back in the machine I built it on and it works fine. >> They are similar machines either and i3 and i7. >> >> Shouldn't that work? Build a UEFI disk on machine A - move it to >> machine B? > > I think the issue is that the UEFI firmware doesn't know which UEFI boot > loader to load. I think this should help: > > https://noobient.com/2017/09/27/fixing-the-efi-bootloader-on-centos-7/ > > Boot into rescue mode, and run: > > efibootmgr --create --label CentOS --disk /dev/sda1 --loader > "\EFI\centos\shim.efi" > > I think you then should end up in a happy place. You can probably add > that entry by hand within the UEFI config itself. Just wondering, will it still boot if he then puts the disk back to the other machine? Regards, Simon