Product data

Using the SRN Table

Important: You should have been sent here from MAP 2010: 2104 – START. Do not

start problem determination from the SRN table; always go to “MAP 2010:

2104 – START” on page 44 first.

1. Locate the SRN in the table. If you cannot find a particular SRN in the table,go

to the SRN list that is in the user or maintenance information for your using-system

SCSI attachment. If you still cannot find the SRN, you have a problem with the

diagnostics, the microcode, or the documentation. Call your support center for

assistance.

2. Read carefully the “Action” you must do for the problem. Do not exchange FRUs

unless you are instructed to do so.

3. Unless instructed otherwise, exchange only one FRU at a time, starting from the

top of the FRU list for that SRN. Always use instructions given in “Chapter 3.

Removal and Replacement Procedures” when exchanging FRUs; a page reference

is given with each FRU in the FRU list. After each FRU is exchanged, go to “MAP

2410: 2104 – Repair Verification” on page 65 to verify the repair.

FRU Names Used in the SRN Table

This section provides a glossary of the FRU names used.

FRU Name in Table Definition

Frame assembly The frame of the 2104 and the backplanes and cables that it contains.

Disk drive module A disk drive attached to a carrier that plugs into one of the backplanes of

the 2104.

External SCSI cable A cable that connects the 2104 to a SCSI attachment or to another device

(for example, another 2104).

Fan-and-power-

supply assembly

An assembly that consists of a power supply unit and a fan. The 2104 can

have two fan-and-power-supply assemblies, or one fan-and-power-supply

assembly and one fan assembly, whichever is suitable for the required

configuration.

Fan assembly An assembly that contains a dc cooling fan. The 2104 can have two

fan-and-power-supply assemblies, or one fan-and-power-supply assembly

and one fan assembly, whichever is suitable for the required configuration.

SCSI interface card

assembly

The card that monitors and controls the various functions of the 2104.

SCSI attachment The means by which the 2104 is connected to the using system (for

example, a SCSI adapter card). The SCSI attachment is located in the

using system.

Switch card

assembly

The assembly that contains all the option switches for the 2104.

Chapter 2. Problem Determination Procedures