Chapter 4: Subsystem Connection and Operation
•
Down:
Connection to a specific host port travels down to a specific
RAID controller as diagrammed below.
This applies to configurations where FC port hub can be
provided externally, e.g., using a FC switch where specific FC
ports are connected to switch ports. Path redundancy can also
be achieved using redundant cable links.
Figure 4
-
3: FALCON-R2224 - Channel Buses When Hub is Disabled
4.3.3 Fibre Channel Speed Selection
Figure 4
-
4: Pin 5 - Fibre Channel Speed Selection
•
UP:
Auto
•
Down:
1Gbps
Speed auto-detection is a specified feature of the Fibre Channel standard. If
one of the devices in the FC-AL loop is set to an auto setting, it will detect
the available device and run at that speed. On the other hand, when you set
the speed to 1G, it has the priority to run at that speed.
The Pin 5 default is set to Auto (the Up position) for the host port transfer
speed. Flip this switch to the down position if the host ports need to run at
1Gbit per second. (See
Figure
4-4
for the location of the Pin 5 switch) Only
Pins 4 and 5 are functional; leave the other pins in the UP position.
Fibre Channels
4-7
