Originally Posted by Frankox
I need to take an image of my Red Hat Enterprise edition (64bit) server, I tried so many times and I can't do this task.
Well, without details there's little we can tell you. You don't say WHAT you tried, with what software, what error(s)/message(s) you got, or what version of RHEL.
Short answer: look at mondoarchive, systemimager, or mkcdrec. Call Red Hat support, since you're paying for it with your RHEL subscription...right???