SuSE Cluster

Hi all! I would like to build a failover cluster with SuSE. It should be two machines, one running and one standby. Each machine should have its own disks with an "data" volume that should be mirrord in realtime between the machines. Can somebody guide me, what applikations should i use? The machine(s) will be an e-mail/www/ftp server. Kind regards Mattias Olsson