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AR3016G Installation and Hardware Reference Manual
4.2.3 Host-side Topologies
The primary concern for configuring host-side topologies is to avoid points
of failure. It is therefore recommended that the host side be connected to at
least two (2) HBAs. It is also preferable to connect the FC RAID
subsystems to the host computer(s) through either a Fibre Channel hub or a
Fibre switch.
4.2.4 Unique Identifier
The unique identifier is a user-specified, 16-bit hexadecimal number that is
used to assign a FC port number to the active controller. Each controller is
assigned a separate hexadecimal number and the firmware then determines
which unique identifier to use. To see how to use the front panel LCD
screen or the terminal emulation program to enter the unique identifier,
please refer to the User's Operation Manual.
4.2.5 ID/LUN Mapping
I/O load distribution is determined by the host ID/LUN mapping. Different
logical groups of drives are mapped to the LUN numbers under a host ID.
For a multi-host operation, a logical drive configuration can be mapped to
different ID/LUN combinations. In this case, the file locking mechanism is
necessary. ID/LUN mapping procedures are described fully in the User's
Operations Manual.
4.3 Sample Topologies
The FC ports on the controller rear panel can be used to connect the
AR3016G to the hosts, and/or external devices. The subsystem will
automatically validate the dual-loop configuration, and the RAID controller
will activate the enclosure monitoring service accordingly.
Rather you are going to connect the AR3016G to hosts, or external
devices, be sure to have SFP transceivers and Fibre cables ready. You
may purchase the SFP transceivers and Fibre cables from your subsystem
vendor. See Appendix C for the available accessories list.
4.3.1 Sample Topology – Clustered Hosts
In the configuration shown in Figure 4-1, one (1) AR3016G subsystem is
connected to two (2) host computers. Data path redundancy makes sense
when the following configurations are available:
4-4
NOTE:
Sample Topologies
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