Setup replication - on existing Mysql server?

Hi,

Why would you need Samba for this?
Both servers don’t need to share any data mounts, all you need to have between them is working network connection and opened MySQL TCP port.

Here you will find some info on how to setup replication is few simple steps:
http://www.percona.com/doc/percona-xtrabackup/howtos/setting _up_replication.html