[CentOS] using CentOS as an iSCSI server?

>No. I don't know what exactly to setup, which is why I'm looking for a howto :)

Rudi,
How exactly did you expect the daemon to know what you wanted to
export without telling it, was starting the daemon w/o any config
not supposed to yield any errors:)

For RHELs target:
http://kbase.redhat.com/faq/docs/DOC-15154

Maybe what you missed from your own tutorial you posted at
http://www.cyberciti.biz/tips/howto-setup-linux-iscsi-target-sanwith-tgt.html
was the fact that the config wasn't persistent when entering commands
at the console. If you restarted the service, it would come up unconfigured.

jlc