IBM TotalStorage DS4500, User Manual

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Table 15. Host-side and drive-side mini-hub indicator lights (continued)
Icon Indicator light Color
Normal
operation
Problem
indicator
Possible
condition
indicated by the
problem
indicator
Bypass (lower
port)
Amber Off On
v Lower mini-hub
port is
bypassed; no
devices are
connected.
v Mini-hub port or
SFP module
has failed or is
loose.
v Fiber-optic
cables are
damaged.
Note: When two
functioning SFP
modules are
installed into the
mini hub port and
no Fibre Channel
cables are
connected to
them, the bypass
indicator light is lit.
If only one
functioning SFP
module is installed
in a host-side mini
hub port and no
Fibre Channel
cables are
connected to it,
the indicator light
is not lit.
However, the
drive-side mini
hub bypass
indicator light will
be lit when one
functioning SFP
module is installed
in the mini hub
port and the mini-
hub has no Fibre
Channel cables
connected to it.
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IBM TotalStorage DS4500 Fibre Channel Storage Server: User’s Guide