Managing Serviceguard Sixteenth Edition, March 2009

separate bus. This arrangement eliminates single points of failure and makes either the
disk or its mirror available in the event one of the buses fails.
Figure 2-2 Mirrored Disks Connected for High Availability
Figure 2-3 below shows a similar cluster with a disk array connected to each node on
two I/O channels. See “About Multipathing” (page 45).
Redundant Disk Storage 47