Optional means all the subitems in this page are not necessary to finish an OS deployment. If you are new to xCAT, you can just jump to Initialize the Compute for Deployment<deploy_os>.
driver_update_disk.rst pre_post_script.rst syncfile.rst additional_pkg.rst network/index.rst enable_kdump.rst install_new_kernel.rst acc_initrd_rootimg_gen_ppc64le.rst trim_diskless_rootimg.rst localdisk.rst