IBM 7985, Problem Determination And Service Manual

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Chapter 2. Introduction
This Problem Determination and Service Guide contains information to help you
solve problems that might occur in your IBM
®
System x3655 Type 7985 and 7943
servers. It describes the diagnostic tools that come with the server, error codes and
suggested actions, and instructions for replacing failing components.
Replaceable components are of three types:
v Tier 1 customer replaceable unit (CRU): Replacement of Tier 1 CRUs is your
responsibility. If IBM installs a Tier 1 CRU at your request, you will be charged for
the installation.
v
Tier 2 customer replaceable unit: You may install a Tier 2 CRU yourself or
request IBM to install it, at no additional charge, under the type of warranty
service that is designated for your server.
v
Field replaceable unit (FRU): FRUs must be installed only by trained service
technicians.
For information about the terms of the warranty and getting service and assistance,
see the Warranty and Support Information document.
The server has two model styles, which are based on the size and number of hard
disk drive bays:
v The 3.5-inch models have six 3.5-inch hot-swap hard disk drive bays. Install only
3.5-inch drives in these models. If you install an optional tape drive, the tape
drive occupies two of the six 3.5-inch drive bays.
v
The 2.5-inch models have eight 2.5-inch hot-swap hard disk drive bays and one
3.5-inch tape drive bay. Install only 2.5-inch hard disk drives and an optional
3.5-inch tape drive in these models.
Throughout this documentation, the terms 2.5-inch models and 3.5-inch models are
used to distinguish between the server styles.
Related documentation
In addition to this document, the following documentation also comes with the
server:
v Installation Guide
This printed document contains instructions for setting up the server and basic
instructions for installing some optional devices.
v
User’s Guide
This document is in Portable Document Format (PDF) on the IBM System x
™
Documentation CD. It provides general information about the server, including
© Copyright IBM Corp. 2006
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