I have been trying to install RHEL 7.9 Where I am booting from the USB and at the boot prompt modifying the kernal by pressing "e"" key to amend the boot options with the location of the kickstart file. The kickstart file from an HTTP server, so to add the "ks=http://..../ks.cfg" boot option.
We have been using this method for many years with no issues until we switched to lenovo P340T Workstation. It gives the Dracut error message is
"Failed to start media check-in. /dev/sdb write-protected, mounting read-only" ...this seems like problem with my USB