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Indicator light
Fault
Bypass
(upper port)
Loop good
Bypass
(lower port)
Table 4: Mini-hub indicator lights (back)
Normal
Color
operation
Component: mini-hub (drive-side)
Amber
Off
Amber
Off
Green
On
Amber
Off
Problem
Possible condition indicated by
indicator
the problem indicator
On
Mini-hub or GBIC has failed.
Note: If a drive-side mini-hub is
not connected to a controller, this
fault light is always on.
•
On
Upper mini-hub port is bypassed
•
Mini-hub or GBIC has failed, is
loose, or is missing
•
Fiber-optic cables are damaged
Note: If the port is unoccupied,
the light is on.
•
Off
The loop is not operational
•
Mini-hub has failed or a faulty
device might be connected to the
mini-hub
•
Drive has failed
Note: If a drive-side mini-hub is
not connected to a controller, the
green light is always off and the
fault light is always on.
•
On
Lower mini-hub port is bypassed
•
Mini-hub or GBIC has failed, is
loose, or is missing
•
Fiber-optic cables are damaged
Note: If the port is unoccupied,
the light is on.
Chapter 2. Operating the controller unit
21
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