The image shows a Corosync cluster with Host C sending and receiving data from Hosts A and B, which are in a Pacemaker custer, and which send a receive data to each other with a floating IP. Hosts A and B are each connected to a DRBD, which send a receive data to each other using DRBD replication, and are also connected to an iSCSI device. The iSCSI device connects out of the Corosync cluster to an iSCSI mount via a floating IP, then on to a Windows or Linux machine.