Thats intended because the setup cript can not be run a second time from this directory after a failure. RH9 is rather old now and it is not supported with security patches anymore, if I remember correctly. Better use a later version of Fedora or Debian / Ubuntu. My personal favorite is Debian together with ISPConfig. Dont use too many small partitions. Mkae e.g a partition for /, for swap and for /var. I thinkl 5 - 10 GB for / is fine plus 2 GB for swap and the rest for /var, but it depends on your disk size and how many software you want to install.