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Netfinity EXP300 Type 3531 3
Diagnostics and Test Information
Note: The service procedures are designed to help you isolate problems. They are
written with the assumption that you have model-specific training on all
computers, or that you are familiar with the computers, functions,
terminology, and service-related information provided in this manual and the
appropriate IBM PC/Netfinity Server Hardware Maintenance Manual.
The following is a list of problems and references for diagnosing the IBM Netfinity
EXP300 - Type 3531.
Additional Service Information
Turning the expansion unit on and off
This section contains instructions for turning the expansion unit on and off under
normal and emergency circumstances.
If you are turning on the expansion unit after an emergency shutdown or power
outage, refer to “Turning on the expansion unit after an emergency” on page 5.
Turning on the expansion unit
Use this procedure to turn on the power for the initial startup of the expansion unit.
1. Verify that:
a. All cables are properly attached.
b. Both power cords are plugged into the back of the expansion unit and into
properly grounded electrical outlets.
c. All hard disk drives are locked securely in place.
d. All switches are set correctly: the internal option switches 1 through 4,
external option switches 1 through 5, and the unit ID switch on the expansion
unit. (See “Setting the interface options and ID settings” on page 10 for more
information.)
Problem Reference
Hard Disk Drive Numbering See “Installing identification labels” on
page 35
Error codes/Error messages Refer to the Symptom-to-FRU index for
the server that the Storage Expansion
Unit you are servicing is connected to.
Expansion Unit options switches See “Setting the interface options and ID
settings” on page 10
Front controls and indications See “Front controls, indicators, and
devices” on page 14
Rear controls and indications See “Rear controls, indicators, and
connectors” on page 15
Tuning the power on and off See “Turning the expansion unit on and
off”
Power supply controls and indicators See “Power-supply controls, indicators,
connectors” on page 15