IBM 3531 manual Diagnostics and Test Information, Turning on the expansion unit, Problem Reference

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.

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

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.)

Netfinity EXP300 Type 3531 3