Are you using a diskless server? If not, probably you are missing a DUD driver. What model of server are you trying to install ? For me I require injecting drivers in Dell R620, as an example, because their controllers are not enabled anymore in vanilla kernel from enterprise linux derivatives
It’d be nice if you can describe a bit about your hardware
Usually kernel parameter for a missing driver (example Megaraid and a 8.5 kernel) will be inst.dd=https://elrepo.org/linux/dud/el8/x86_64/dd-megaraid_sas-07.717.02.00-1.el8_5.elrepo.iso
