[CentOS] UEFI booting

Simon Matter

simon.matter at invoca.ch
Thu Sep 19 13:01:20 UTC 2019

> 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?


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