IBM TotalStorage DS4500 User Manual page 64

Table 15. Host-side and drive-side mini-hub indicator lights (continued)
Icon Indicator light
Bypass (upper
port)
34
IBM TotalStorage DS4500 Fibre Channel Storage Server: User's Guide
Normal
Color operation
Amber Off
Possible
condition
indicated by the
Problem problem
indicator indicator
On
v Upper mini-hub
port is
bypassed.
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 ports 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
will not be lit.
However, the
drive-side mini
hub bypass
indicator light will
be lit when one
SFP module is
installed in the
mini hub and the
mini hub has no
Fibre Channel
cable connection.