I've been trying to install OL9.2 on a Dell R630. The drives are freshly formatted. I used Rufus on Windows in DD mode to write out the OL9 installer ISO to a thumb drive. In the OL installer UI, I set the locations use to EXT4 rather than XFS. It completed just fine. Upon boot, it fails the same 6x in a row the exact same way every time no matter what I do.
I tried manually entering all the following grub options:
set root=(hd0)
set prefix=(hd0)/boot/grub
insmod normal
normal
That failed with the same fs.c:121:unknown filesystem error.
I wiped the drives and reinstalled OL9.2 a 7th time leaving all the defaults as XFS and it finally worked.
What needs to happen for OL9 to use EXT4?