Managing Serviceguard 11th Edition, Version A.11.16, Second Printing June 2004

Understanding Serviceguard Hardware Configurations
Larger Clusters
Chapter 2 55
Figure 2-10 Eight-Node Active/Standby Cluster
Point to Point Connections to Storage Devices
Some storage devices allow point-to-point connection to a large number
of host nodes without using a shared SCSI bus. An example is shown in
Figure 2-11, a cluster consisting of eight nodes with a Fibre Channel
interconnect. (Client connection is provided through Ethernet.) The
nodes access shared data on an XP 256 or EMC disk array configured
with 16 I/O ports. Each node is connected to the array using two separate
F/W SCSI channels configured with PV Links. Each channel is a
dedicated bus; there is no daisy-chaining.