Re: [CentOS] Not getting bootloader installed with CentOS 8 + mdraid

Once upon a time, Chris Adams linux@cmadams.net said:

I am trying to use a kickstart to install CentOS 8.2 on a server with a pair of drives with Linux software RAID 1. The install completes, but the resulting system will not boot - I get "Booting from Hard drive C:" from the BIOS (Dell in legacy BIOS mode, not UEFI) and it stops. If I then start the installer in rescue mode and run grub2-install on the two drives, it boots okay.

Never mind, this was user error. :)

I have a kickstart that discard unused space in %post to make VM images smaller, and it tries too hard (and the SSDs listened!) - it got the unpartitioned space between the partition table and the first partition, and GRUB2 uses more of that when /boot is on RAID1. Oops.