Host-Side And Drive-Side Mini-Hub Indicator Lights - IBM TotalStorage DS4400 User Manual

Table 15 describes the indicator light status when there are Fibre Channel
connections to devices between host-side and drive-side mini-hubs.
Table 15. Host-side and drive-side mini-hub indicator lights
Icon Indicator light
None Speed
! Fault
Bypass (upper port) Amber
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IBM TotalStorage DS4400 Fibre Channel Storage Server: User's Guide
Normal
Color operation
Green On for 2 Gb
Off for 1 Gb
Amber Off
Off
Problem Possible condition indicated by
indicator the problem indicator
not applicable Light on indicates data transfer
rate of 2Gb/s. Light off indicates
data transfer rate of 1Gb/s.
On mini-hub has failed
Note: If a host-side mini-hub is
not connected to a controller, this
fault light is always lit.
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 there are two
functioning SFP modules installed
into the mini-hub ports and there
are no Fibre Channel cables
connected to them, the bypass
indicator light is lit.
If there is only one functioning
SFP module installed in a
host-side mini-hub port and there
are no Fibre Channel cables
connected to it, the indicator light
will not be lit.
However, the drive-side mini-hub
bypass indicator light will be lit
when there is one SFP module
installed in the mini-hub and the
mini-hub has no Fibre Channel
cable connection.