My experience with UEFI is that it is a black art. Fought with it until a deadline forced me to non-UEFI. In my case a drive-based UEFI partition (FAT32) was required. See if efibootmgr is available and would help you. I should note that, in the process. I discovered that the UEFI standard makes no provision for RAID if it is disk-based. I would love to hear someone contradict me on that and point me to documentation on how to do it without resorting to exotic maneuvers. ________________________________ From: CentOS <centos-bounces at centos.org> on behalf of Jerry Geis <jerry.geis at gmail.com> Sent: Thursday, September 19, 2019 6:42 AM To: CentOS mailing list <centos at centos.org> Subject: [EXTERNAL] [CentOS] UEFI booting 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? Thanks Jerry _______________________________________________ CentOS mailing list CentOS at centos.org https://lists.centos.org/mailman/listinfo/centos