IBM TotalStorage 2109 M12, Installation And Service Manual

Page: 50 / 159

Attention: Do not route the cables in front of the air exhaust vent, which is
located at the top of the port side of the chassis.
The minimum bend radius for a 50–micron cable is 3.05 cm (2 in.) under full
tensile load, and 3.048 cm (1.2 in.) with no tensile load.
Do not use tie wraps for optical cables because they are easily overtightened.
Interpreting LED activity
You can determine system activity and status by monitoring the activity of the LEDs
on the switch.
There are four possible LED states:
v No light
v
Steady light in one of the following colors:
– Green
– Amber
– Yellow (displays when both green and amber LED elements are lit)
v Slow-flashing light (green, amber, or yellow)
v
Fast-flashing light (green, amber, or yellow)
The LEDs can flash green, yellow, or amber while the switch is starting or while a
POST or other diagnostic tests are running. This is normal. It does not indicate a
problem unless the LEDs do not indicate that all components are operational after
the switch is started, after a POST, or after any diagnostic tests are complete.
See the error log for any errors. For information about the error log, see the
Brocade Diagnostic and System Error Message Reference .
LEDs on the 16–port card
The following LEDs are on the 16–port card:
v
Power LED
v Status LED
v
Port speed LED for each port
v Port status LED for each port
Note: The LED patterns can temporarily change during a POST and other
diagnostic tests.
Figure 14 on page 21 shows the location of the LEDs on the 16–port card.
20
IBM TotalStorage SAN Switch: 2109 Model M12 Installation and Service Guide