> On 27/08/21 10:51 pm, Rob Kampen wrote: >> Unfortunately the server is remote and the CentOS7 USB device I left >> plugged into the machine refuses to boot from UEFI mode. Thus a rescue >> mode boot has not been possible. >> > So i made a trip and replaced the USB stick with another one - CentOS7 >> >> I am unsure what file I need to point the UEFI bios disk manager setup >> at, I have tried shim.efi and shimx84-centos.efi >> >> The message I get is that linux16 and initrd16 cannot find their >> files. The change to linuxefi and initrdefi also fail but the system >> reboot happens before I can see what flashes on screen. >> >> Is a USB based UEFI booted rescue mode the only way I can fix this? > > So I then rebooted - selected UEFI native boot and got into rescue mode > - only problem is that the rescue system did not find a Linux system. > Really weird as each of the four drives effectively have a complete > centos7 system. No idea why it didn't start md raid and find the 6 raid1 > volumes. > > About to give this a miss and just live with legacy boot - this UEFI > thing is just far too complicated. Looking on line at all the various > blogs and questions it seems I am not alone in finding it far too > complicated. Don't worry, you're not alone. IMHO UEFI and GRUB2 and the whole Linux startup procedure can be a real problem to handle and I guess most people just give up earlier or later and simply use the installer to do the job. Simon