Base HA - S80 or S85 Advanced Cluster Server System Cabling
This section provides cabling information for the base HA - S80 or S85 Advanced
Cluster Server. The two model S80 or S85s should be installed and operational before
cabling the HA - S80 or S85 Advanced Cluster Server. Four areas of cabling must be
considered to ensure the redundancy required for no single points of failure:
v Cabling for server system consoles and cluster administration workstations
v Heartbeat connections between HA - S80 or S85 Advanced Cluster Servers
v SSA cable connections between HA - S80 or S85 Advanced Cluster Servers and
7133 Serial Disk Subsystems
v Power cable connections
Cabling for System Consoles and Cluster Administration Workstations
The system console for an HA - S80 or S85 Advanced Cluster Server can be either an
ASCII terminal connection to the S1 serial port or a graphics terminal connected to a
graphics display adapter with keyboard and mouse connections directly to the keyboard
and mouse ports on the server.
A cluster administration workstation is connected through a LAN connection. This
section shows the cabling requirements for these connections.
HA Cluster Server with ASCII System Console
A single ASCII terminal connected to both servers in the cluster, as shown in the
following illustration, allows a system administrator or the service representative to work
on one server or the other without disrupting the operation of the cluster.
Appendix I. High Availability Systems 651
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