I am trying to install RHEL 8 on an older server that had been running CentOs 7 and can't seem to do custom partitions even though it will install if I allow it to create the partitions. Every time I try to do a custom install I get the error message:
/boot file system cannot be type lvmlv. raid0 may not have enough space.
I did an automatic install and logged in to see how the disk was partitioned:
> md126p1 1.1M biosboot > md126p2 1G linux filesystem > md126p3 1T LVM
I tried repurposing the existing partitions created by the automatic install to the new installation. I tried deleting all partitions and repartitioning it using the same sizes. I even tried to use fdisk from a Slackware installation DVD to rewrite the partitons so that the RHEL installation wouldn't see the data from the old install. However, I got
failed to write disklable. Operation not permitted.
I have 4 disks configured as a Raid 5 in the BIOS. And, as I said, it is an older server that does not support efi.
I can always do an automatic install and use lvm to create the additional partitions. But, I would like to figure out how to do this during the installation process.