Configuring Fc Host Port Failover - Quantum Scalar i500 User Manual

Configuring FC Host Port
Failover
Scalar i500 User's Guide
When I/O blades are installed in the library, administrative users can
3 enable and configure the optional FC host port failover feature. This
feature is disabled by default.
You can configure the FC host port failover feature so that a "standby"
target port (1 or 2) on an I/O blade can assume the identity and LUN
mapping configuration of the designated "active" target port if the active
port fails. Host port failover enables the library to continue operations
without requiring you to reconfigure the host or the SAN.
To enable host port failover, you must configure target ports 1 and 2 on
the I/O blade as point-to-point connections (
). I/O blade target ports 1 and 2 must be attached to the
Configuration
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) (
). If these conditions are not met, an error message will display
Zoning
when you attempt to enable host port failover.
When both target ports on the I/O blade are attached to the
Note:
same SAN fabric, you may see duplicate medium changers
being reported. To stop this from happening, you need to
enable host port mapping and configure host mapping. For
more information, see
page 111.
For information on configuring I/O blade ports and channel zoning, see
Configuring FC I/O Blade Ports
Blade Channel Zoning
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
Target Port on page 114.
Chapter 3 Configuring Your Library
Configuring Host Mapping
on page 103 and
on page 105.
Repairing and Enabling a Failed
Working With FC I/O Blades
Setup > I/O Blades > Port
Setup > I/O Blades > Channel
on
Configuring FC I/O
113