Chapter 3 Configuring Your Library
Working With FC I/O Blades
Scalar i500 User’s Guide 120
To enable host port failover, you must configure target ports 1 and 2 on
the FC I/O blade as point-to-point connections (
Setup > FC I/O Blades >
Port Configuration
). FC I/O blade target ports 1 and 2 must be attached to
the same SAN fabric to provide host access. The primary active port is
used for host communications, while the passive standby port is kept
idle. In addition, channel zoning must be configured so that target ports 1
and 2 have access to all initiator ports (ports 3–6) (
Setup > FC I/O Blades >
Channel Zoning
). If these conditions are not met, an error message will
display when you attempt to enable host port failover.
For information on configuring FC I/O blade ports and channel zoning,
see Configuring FC I/O Blade Ports
on page 110 and Configuring FC I/O
Blade Channel Zoning on page 111.
The library generates a Reliability, Availability, and Serviceability (RAS)
ticket when port failover occurs. Examine the ticket to determine the
reason for the failover. When the failed port is repaired, the port must be
re-enabled to make it available for host port failover as the standby or
active port. For more information, see Repairing and Enabling a Failed
Target Port on page 121.
Note: The current feature implementation does not support
arbitrated loop or target/initiator mode.
Note: Ports on the 4 Gb FC I/O blade used for failover must connect
to the same SAN fabric.
Note: When both target ports on the FC I/O blade are attached to the
same SAN fabric, you may see duplicate media changer
devices (partitions) being reported. To stop this from
happening, you need to enable host port mapping and
configure host mapping. For more information, see
Configuring Host Mapping
on page 118.
Note: When Fibre Channel port 2 is selected to be the active port in a
host port failover configuration, the active port can switch to
the default setting, port 1, following a reboot. Reconfigure the
host port failover settings so that the intended port is the
active port.
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