Using The Diagnostic Hardware; Symptom-To-Fru Index; Controller - IBM TotalStorage DS4000 Hardware Maintenance Manual

Table 47. DS4500 storage server host-side and drive-side mini hub indicator lights (continued)
Icon Indicator light
Bypass
(lower port)

Using the diagnostic hardware

The DS4500 storage server comes with a wrap-plug adapter and LC coupler. The
wrap-plug adapter and LC coupler are used to identify fibre path problems. The
loopback and sendEcho tests are described in the IBM TotalStorage DS4000 Problem
Determination Guide.

Symptom-to-FRU index

The Symptom-to-FRU index (Table 48) lists symptoms and the possible causes. The
most likely cause is listed first.
The problem determination (PD) maps found in the IBM TotalStorage DS4000
Problem Determination Guide provide you with additional diagnostic aids.
Color
Amber
Table 48. Symptom-to-FRU index for DS4500 RAID controller
Problem
Controller LED (front cover)
is on.
Normal Problem
operation indicator
Off On
Action/FRU
1. Reseat Controller CRU.
2. Place Controller online using DS4000 Storage Manager
GUI.
3. If in passive mode, check Fibre path/SFP.
4. Controller CRU
Chapter 11. Type 1742 DS4500 Storage Server
Possible condition indicated by
the problem indicator
v Lower mini hub port is
bypassed; there are no devices
connected.
v Mini hub or SFP module 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 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.
101