IBM TotalStorage DS4500 User Manual page 65

Table 15. Host-side and drive-side mini-hub indicator lights (continued)
Icon Indicator light
Loop good
Normal
Color operation
Green On
Problem
indicator
Off
Chapter 2. Operating the DS4500 Storage Server
Possible
condition
indicated by the
problem
indicator
v The loop is not
operational, so
no devices are
connected.
v Mini hub has
failed or a faulty
device is
connected to
the mini hub.
v If no SFP
module is
installed, the
indicator will be
lit.
v If one
functioning SFP
module is
installed in the
host-side mini
hub port and no
Fibre Channel
cable is
connected to it,
the loop good
indicator light
will not be lit.
If one
functioning SFP
module is
installed in the
drive-side mini
hub port and no
Fibre Channel
cable is
connected to it,
the loop good
indicator light
will be lit.
v Storage
expansion
enclosure has
failed
(drive-side mini
hub only).
35