HP Surestore Disk Array 12h and FC60 - Manual (Page 102)

102 Topologies for HP-UX
Topologies for HP-UX
The topology of a network or a Fibre Channel Arbitrated Loop (Fibre Channel-AL) is the
physical layout of the interconnected devices; that is, a map of the connections between
the physical devices. The topology of a Fibre Channel-AL is extremely flexible because of
the variety and number of devices, or nodes, that can be connected to the Fibre Channel-
AL. A node can be a host system or server, a 10-port HP Fibre Channel-AL hub, or the
controller modules in a disk array. Two controller modules and two power supply modules
are required for high availability topologies. Because it is impossible to document all the
possible physical layouts, the hardware topologies supported by the Disk Array FC60 are
grouped into five general categories:
• Basic topology
• Single-system distance topology
• High availability topology
• High availability, distance, and capacity topology
• Campus topology
In addition to these topologies which include hubs, the disk array FC60 supports some
switch configurations. Each of the five types of topology and switch configurations are
documented in the following sections.