IBM 8668 - Eserver xSeries 232 Owner's manual

Hardware Maintenance Manual
xSeries 232, Type 8668
ERserver
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Hardware Maintenance Manual
xSeries 232, Type 8668
ER s e r v e r
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Note
Before using this information and the product it supports, be sure to read the general information
under “Notices” on page 167.
First Edition June 2001 (updated June 2002)
The following paragraph does not apply to the United Kingdom or any country where such provisions are
inconsistent with local law:
INTERNATIONAL BUSINESS MACHINES CORPORATION PROVIDES THIS PUBLICATION ″AS IS″WITHOUT
WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Some states do
not allow disclaimer of express or implied warranties in certain transactions, therefore, this statement may not
apply to you.
This publication could include technical inaccuracies or typographical errors. Changes are periodically made to the
information herein; these changes will be incorporated in new editions of the publication. IBM may make
improvements and/or changes in the product(s) and/or the program(s) described in this publication at any time.
This publication was developed for products and services offered in the United States of America. IBM may not
offer the products, services, or features discussed in this document in other countries, and the information is subject
to change without notice. Consult your local IBM representative for information on the products, services, and
features available in your area.
Requests for technical information about IBM products should be made to your IBM reseller or IBM marketing
representative.
© Copyright International Business Machines Corporation 2000, 2001. All rights reserved.
US Government Users Restricted Rights – Use, duplication or disclosure restricted by GSA ADP Schedule Contract
with IBM Corp.

About this manual
This manual contains diagnostic information, a Symptom-to-FRU index, service
information, error codes, error messages, and configuration information for the
IBM
®
xSeries 232.
Important: This manual is intended for trained servicers who are familiar with
IBM PC Server products.
Important safety information
Be sure to read all caution and danger statements in this book before performing
any of the instructions. See “Safety information” on page 133.
Leia todas as instruções de cuidado e perigo antes de executar qualquer operação.
Prenez connaissance de toutes les consignes de type Attention et Danger avant de
procéder aux opérations décrites par les instructions.
Lesen Sie alle Sicherheitshinweise, bevor Sie eine Anweisung ausführen.
© Copyright IBM Corp. 2000, 2001 iii

Accertarsi di leggere tutti gli avvisi di attenzione e di pericolo prima di effettuare
qualsiasi operazione.
Lea atentamente todas las declaraciones de precaución y peligro ante de llevar a
cabo cualquier operación.
Online Support
Use the World Wide Web (WWW) to download Diagnostic, BIOS Flash, and device
driver files.
File download address is:
http://www.ibm.com/pc/support
iv Hardware Maintenance Manual: xSeries 232, Type 8668

Contents
About this manual ..........iii
Important safety information ........iii
Online Support .............iv
General checkout ..........1
General information .........3
Features and specifications..........3
Notices and statements in this book ......5
What the IBM xSeries 232 offers ........5
Reliability, availability, and serviceability features . . 6
Server controls and indicators ........7
Turning on the server ..........9
Turning off the server ..........10
Operator information panel .........11
Diagnostics.............13
Diagnostic tools overview .........13
POST................13
Error logs ..............14
SCSI messages (some models) ........14
Diagnostic programs and error messages ....15
Text messages ............15
Starting the diagnostic programs ......16
Viewing the test log ..........17
Recovering BIOS code ...........17
Identifying problems using status LEDs .....18
Power supply LEDs ..........19
Light Path Diagnostics panel .......19
Replacing the battery ...........20
Configuration ............23
Using the Configuration/Setup Utility program . . 23
Starting the Configuration/Setup Utility program 23
Main menu of the Configuration/Setup Utility 24
Using passwords ...........27
Using the SCSISelect utility program ......28
Starting the SCSISelect utility program ....28
Choices available from the SCSISelect menu . . 28
Using the PXE Boot Agent Utility program . . . 29
Using the ServerGuide CDs .........31
Features at a glance ..........32
Setup and configuration overview ......33
System Partition ............34
Typical NOS installation .........34
Setting up or updating multiple servers ....34
Installing your NOS without ServerGuide . . . 35
Additional programs included with ServerGuide 35
Installing options ..........37
Major components of the xSeries 232 server . . . 37
Components by model .........37
System board locations ..........40
System board option connectors ......40
System board internal cable connectors ....41
System board external port connectors ....43
System board switches and jumpers .....43
System board LED locations ........45
Light Path Diagnostics panel .......46
Before you begin ............47
System reliability considerations ......48
Working inside a server with power on ....48
Installing components ...........48
Removing the cover, door, and bezel .....48
Working with adapters .........54
Internal drives ............58
Memory modules ...........65
Microprocessor kit installation .......67
Power supplies ............71
Fans ................80
Completing the installation ........82
Connecting external options .........85
Input/output connector locations ......86
Input/output ports ...........86
Cabling the server ............95
Cabling the tower model .........95
Cabling the rack model .........96
FRU information (service only) ....97
Operator information bracket ........97
Power switch panel............99
Rear cable bracket ............101
PCI adapter card support assembly ......102
DASD backplane assembly .........103
Power supply backplane .........103
System board .............105
Symptom-to-FRU index .......107
Beep Symptoms ............107
No Beep symptoms ...........109
Diagnostic Panel LED ..........109
Diagnostic error codes ..........111
Error symptoms ............115
Power supply LED errors .........116
POST error codes ............117
Service processor error codes ........122
SCSI error codes ............123
Temperature error messages ........123
Fan error messages ...........124
Power error messages ..........124
System shutdown ............124
Power related system shutdown ......124
Temperature related system shutdown ....125
DASD checkout ............125
Host Built-In Self Test (BIST) ........126
Bus fault messages ...........126
Undetermined Problems..........126
Parts listing, xSeries 232 ......129
© Copyright IBM Corp. 2000, 2001 v

System ...............130
Keyboards ..............131
Powercords..............132
Related service information .....133
Safety information............133
General safety ............133
Electrical safety............134
Safety inspection guide .........135
Handling electrostatic discharge-sensitive
devices ..............136
Grounding requirements ........137
Safety notices (multi-lingual translations) . . . 137
Send us your comments! .........166
Problem determination tips.........167
Notices ...............167
Trademarks ..............168
vi Hardware Maintenance Manual: xSeries 232, Type 8668

General checkout
The server diagnostic programs are stored in upgradable read-only memory (ROM)
on the system board. These programs are the primary method of testing the major
components of the server: the system board, Ethernet controller, video controller,
RAM, keyboard, mouse (pointing device), diskette drive, serial ports, hard drives,
and parallel port. You can also use them to test some external devices. See,
“Diagnostic tools overview” on page 13.
Also, if you cannot determine whether a problem is caused by the hardware or by
the software, you can run the diagnostic programs to confirm that the hardware is
working properly.
When you run the diagnostic programs, a single problem might cause several error
messages. When this occurs, work to correct the cause of the first error message.
After the cause of the first error message is corrected, the other error messages
might not occur the next time you run the test.
A failed system might be part of a shared DASD cluster (two or more systems
sharing the same external storage device(s). Prior to running diagnostics, verify
that the failing system is not part of a shared DASD cluster.
A system might be part of a cluster if:
vThe customer identifies the system as part of a cluster.
vOne or more external storage units are attached to the system and at least one of
the attached storage units is additionally attached to another system or
unidentifiable source.
vOne or more systems are located near the failing system.
If the failing system is suspected to be part of a shared DASD cluster, all
diagnostic tests can be run except diagnostic tests which test the storage unit
(DASD residing in the storage unit) or the storage adapter attached to the storage
unit.
Notes:
1. For systems that are part of a shared DASD cluster, run one test at a time in
looped mode. Do not run all tests in looped mode, as this could enable the
DASD diagnostic tests.
2. If multiple error codes are displayed, diagnose the first error code displayed.
3. If the computer hangs with a POST error, go to “Error logs” on page 14.
4. If the computer hangs and no error is displayed, “Diagnostic programs and
error messages” on page 15.
5. Power supply problems, “Power supply LED errors” on page 116.
6. For intermittent problems, check the error log; “Undetermined Problems” on
page 126.
© Copyright IBM Corp. 2000, 2001 1

001 IS THE SYSTEM PART OF A CLUSTER?
YES. Schedule maintenance with the customer. Shut down all systems
related to the cluster. Run storage test.
NO. Go to step 002.
002 THE SYSTEM IS NOT PART OF A CLUSTER
vPower-off the computer and all external devices.
vCheck all cables and power cords.
vSet all display controls to the middle position.
vPower-on all external devices.
vPower-on the computer.
vRecord any POST error messages displayed on the screen. If an error is
displayed, look up the first error in the “Error logs” on page 14.
vCheck the information LED panel System Error LED; if on, see
“Operator information panel” on page 11.
vCheck the System Error Log. If an error was recorded by the system, see
“Error logs” on page 14.
vStart the Diagnostic Programs. See “Starting the diagnostic programs” on
page 16.
vCheck for the following responses:
1. One beep.
2. Readable instructions or the Main Menu.
003 DID YOU RECEIVE BOTH OF THE CORRECT RESPONSES?
YES. Run the Diagnostic Programs. If necessary, refer to “Starting the
diagnostic programs” on page 16.
NO. Find the failure symptom in “Symptom-to-FRU index” on page 107.
2Hardware Maintenance Manual: xSeries 232, Type 8668

General information
The IBM xSeries 232 is a high-performance, symmetric multiprocessing
(SMP) server. It is ideally suited for networking environments that require superior
microprocessor performance, efficient memory management, flexibility, and reliable
data storage.
The xSeries 232 contains several IBM X-Architecture
™
technologies, which help
increase server performance and reliability. For more information about
X-Architecture features, refer to “What the IBM xSeries 232 offers” on page 5. You
can obtain more information about the IBM X-Architecture technologies and
features at http://www.pc.ibm.com/us/eserver/xseries/xarchitecture/index.html.
If you have access to the World Wide Web, you can obtain up-to-date information
about the xSeries 232 model and other IBM server products at the following World
Wide Web address:
http://www.pc.ibm.com/eserver/xseries/
The information label containing the serial number, machine type, model number,
and agency marks for your server is located as follows:
Tower model On the bottom of the server, on the rear of the server, and on the
front of the server below the bezel
Rack model On the side of the server, on the rear of the server, and on the front
of the server below the bezel
Features and specifications
The following table provides a summary of the features and specifications for the
xSeries 232 server.
© Copyright IBM Corp. 2000, 2001 3

Table 1. Features and specifications
Microprocessor:
vIntel
®
Pentium
®
III
v256 or 512 KB Level-2 cache
vSupports up to two
microprocessors
Memory:
vMaximum: 4 GB
vType: ECC, SDRAM, PC133,
registered DIMMs
vSlots: Four (two-way
interleaved)
Drives standard:
vDiskette: 1.44 MB
vCD-ROM: 48X IDE
Expansion bays:
vHot-swap: Six slim high
vNon-hot-swap: Three 5.25-inch
(one used by CD-ROM drive)
vYou can install a drive-bay
expansion kit to convert two of
the 5.25-inch bays so that they
support three hot-swap drives
PCI expansion slots:
vOne 33 MHz/32-bit
vTwo 33 MHz/64-bit
vTwo 66 MHz/64-bit
Power supplies:
Depending on model: one
385-watt nonredundant power
supply; or two 250-watt (115-230
V ac) power supplies with a
maximum of three 250-watt units
for power-supply redundancy
Acoustical noise emissions:
vSound power, idling: 6.6 bel maximum
vSound power, operating: 6.8 bel
maximum
vSound pressure, operating: 53 dBa
maximum
Video:
vS3 video controller
vCompatible with SVGA and VGA
v8 MB video memory
Size (rack model 5U)
vHeight: 217.2 mm (8.6 in.)
vDepth: 688 mm (27.1 in.)
vWidth: 427.8 mm (16.8 in.)
vWeight: approximately 35.4 kg (78 lb)
when fully configured
Size (tower model)
vHeight: 439.8 mm (17.3 in.)
vDepth: 700 mm (27.6 in.)
vWidth: 217.2 mm (8.6 in.)
vWeight: approximately 37.64 kg (83 lb)
when fully configured
Integrated functions:
vUltra160 SCSI controller
vOne 10BASE-T/100BASE-TX/100BASE-
FX, Intel Ethernet controller with alert
on LAN
™
and Wake on LAN
®
support
vTwo serial ports
vTwo Universal Serial Bus (USB) ports
vKeyboard port
vMouse port
vVideo port
vIntegrated system management
processor (ISMP) with two ISM
(RS-485) RJ-45 connectors
Environment:
vAir temperature:
– Server on: 10° to 35°C (50.0° to
95.0°F). Altitude: 0 to 914 m
(2998.7 ft)
– Server on: 10° to 32°C (50.0° to
89.6°F). Altitude: 914 m (2998.7
ft) to 2133 m (6998.0 ft)
– Server off: 10° to 43°C (50.0° to
109.4°F). Maximum altitude:
2133 m (6998.0 ft)
vHumidity:
– Server on: 8% to 80%
– Server off: 8% to 80%
Heat output:
Approximate heat output in British
thermal units (Btu) per hour
vMinimum configuration: 683 Btu
(200 watts)
vMaximum configuration: 1877 Btu
(550 watts)
Electrical input:
vSine-wave input (50-60 Hz)
required
vInput voltage low range:
– Minimum: 100 V ac
– Maximum: 127 V ac
vInput voltage high range:
– Minimum: 200 V ac
– Maximum: 240 V ac
vInput kilovolt-amperes (kVA)
approximately:
– Minimum: 0.08 kVA
– Maximum: 0.52 kVA
4Hardware Maintenance Manual: xSeries 232, Type 8668

Notices and statements in this book
The caution and danger statements used in this book also appear in the
multilingual Safety Information book provided on the IBM Documentation CD. Each
caution and danger statement is numbered for easy reference to the corresponding
statements in the safety book.
The following types of notices and statements are used in this book:
vNote: These notices provide important tips, guidance, or advice.
vImportant: These notices provide information or advice that might help you
avoid inconvenient or problem situations.
vAttention: These notices indicate possible damage to programs, devices, or data.
An attention notice is placed just before the instruction or situation in which
damage could occur.
vCaution: These statements indicate situations that can be potentially hazardous
to you. A caution statement is placed just before the description of a potentially
hazardous procedure step or situation.
vDanger: These statements indicate situations that can be potentially lethal or
extremely hazardous to you. A danger statement is placed just before the
description of a potentially lethal or extremely hazardous procedure step or
situation.
What the IBM xSeries 232 offers
The unique design of the server takes advantage of advancements in symmetric
multiprocessing (SMP), data storage, and memory management. The server
combines:
vIBM X-Architecture technology
IBM X-Architecture leverages proven innovative IBM technologies to build the
most powerful, and reliable Intel processor-based servers in the world.
vImpressive performance using an innovative approach to SMP
The server supports up to two Pentium III microprocessors. The server comes
with one microprocessor installed; you can install an additional microprocessor
to enhance performance and provide SMP capability.
vLarge data-storage and hot-swap capabilities
All models of the server support up to six hot-swap hard disk drives. This
hot-swap feature enables you to remove and replace hard disk drives without
turning off the server.
The addition of an optional digital linear tape drive (DLT) enables quick backup
of large amounts of data.
vIBM integrated system management processor (ISMP)
The integrated system management processor provides environmental
monitoring for your server. When environmental conditions exceed thresholds or
when system components fail, the ISMP lights the Light Path Diagnostics
™
LEDs
to indicate the location of the problem. Critical errors, as well as environmental
and configuration information, are also included in the error log.
If an optional Remote Supervisor Adapter is installed on the Advanced System
Management (ASM) interconnect network, you can view the system health;
update the ISMP code; power on, power off, and restart the server; view the
error log; view the vital product data; and send alerts over the ASM interconnect
network.
vRedundant power capabilities
General information 5

Depending on model, the server comes with either one 385-watt nonredundant
power supply, or two 250-watt power-supply units. The two power-supply units
provide redundant power for many server configurations. For power loads
above 250 watts, a third optional power supply can be installed to provide a full
500 watts of power.
The NON LED on the system board is lit when the power load is 250 watts or
greater with two power supplies, or when the power load is 500 watts or greater
with three power supplies.
vLarge system memory
The memory bus in your server supports up to 4 GB (GB equals approximately
1 000 000 000 bytes) of two-way interleaved system memory. The memory
controller provides error correcting code (ECC) support for up to four
industry-standard PC133, 3.3 V, 168-pin, 8-byte, registered, synchronous-
dynamic-random access memory (SDRAM) dual inline memory modules
(DIMMs).
vIntegrated network environment support
The server comes with an Ethernet controller on the system board. This Ethernet
controller has an interface for connecting to 10-Mbps or 100-Mbps networks. The
server automatically selects between 10BASE-T and 100BASE-TX. The controller
provides full-duplex (FDX) capability, which enables simultaneous transmission
and reception of data on the Ethernet local area network (LAN).
vRedundant network interface card
The addition of an optional, redundant network interface card (NIC) provides a
failover capability to a redundant Ethernet connection. If a problem occurs with
the primary Ethernet connection, all Ethernet traffic associated with this primary
connection is automatically switched to the redundant NIC. This switching
occurs without data loss and without user intervention.
vOptional PCI adapters
The server uses peripheral component interconnect (PCI) bus architecture to
provide compatibility with a wide range of existing hardware devices and
software applications. The server supports up to five PCI adapters in the
expansion slots.
Reliability, availability, and serviceability features
Three of the most important features in server design are reliability, availability,
and serviceability (RAS). These factors help to ensure the integrity of the data
stored on your server; that your server is available when you want to use it; and
that should a failure occur, you can diagnose and repair the failure with minimal
inconvenience.
The following is an abbreviated list of the RAS features that your server supports:
vMenu-driven setup, system configuration, RAID configuration, and diagnostic
programs
vPower-on self-test (POST)
vROM-resident diagnostics
vIntegrated system management processor (ISMP)
vPredictive failure alerts
vRemote system problem-determination support
vPower and temperature monitoring
vMicroprocessor built-in self-test (BIST)
vInternal error signal monitoring
vConfiguration checking
6Hardware Maintenance Manual: xSeries 232, Type 8668

vCPU/VRM failure identification through Light Path Diagnostics technology and
alerting
vDiagnostic support of ServeRAID
™
adapters and Ethernet adapters
vHot-swap drive bays
vError codes and messages and system error logging
vUpgradable BIOS, diagnostics, and ISMP code
vAutomatic restart after a power failure
vParity checking on the SCSI bus
vError checking and correcting (ECC) memory
vRedundant hot-swap power-supply option
vRedundant hot-swap cooling
vRedundant Ethernet capabilities (with optional adapter)
vVital product data (VPD) on processor complex, system board, power backplane,
SCSI backplane, and each power supply
vOperator information panel and group of diagnostic LEDs on the system board
vRemind button to temporarily turn off LEDs for nonvital alerts
Server controls and indicators
The following illustrations show the controls and indicators on the front of the
server.
Tower model
Hard disk
drive activity
light (green)
Hard disk
drive status
light (amber)
Reset
button
Power-control
button
Power-control
button shield
(if installed)
Cover-release
latch
Serial
number
Operator
information
panel
General information 7

Rack model
Hard disk
drive activity
light (green)
Hard disk
drive status
light (amber)
Reset button
Power-control
button
Cover-release
latch
Operator
information
panel
Power-control
button shield
(if installed)
Serial
number
Power-control button shield: You can install this circular disk over the
power-control button to prevent accidental manual power-off. This disk is
provided with your server.
Power-control button: Press this button to manually shut down and turn off the
server.
Reset button: Press this button to reset the server and run the power-on self-test
(POST). You might need to use a pen or the end of a straightened paper clip to
press the button.
Operator information panel: The lights on this panel give status information for
your server. See “Operator information panel” on page 11.
Cover release latch: Slide this lever to release the cover.
Serial number: This number uniquely identifies your server.
Hard disk drive status light: Each of the hot-swap drives has a hard disk drive
status light. When this amber light is on continuously, the drive has failed.
If a ServeRAID adapter is installed and this amber light flashes slowly (one flash
per second), the drive is being rebuilt. When the light flashes rapidly (three flashes
per second), the controller is identifying the drive.
Hard disk drive activity light: Each of the hot-swap drives has a hard disk drive
light. When this green light is flashing, the controller is accessing the drive.
8Hardware Maintenance Manual: xSeries 232, Type 8668

Rear view (tower shown)
DC power
LED (green)
DC power
LED (green)
AC power
LED (green)
AC power
LED (green)
DC
GOOD AC GOOD
Two 250-watt configuration 385-watt configuration
AC power light: This green light provides status information about the power
supply. During typical operation, both the ac and dc power lights are on.
DC power light: This green light provides status information about the power
supply. During typical operation, both the ac and dc Power lights are on.
Turning on the server
After you plug the power cord of your server into the power supply and an
electrical outlet, the server can be started in any of the following ways:
vYou can press the power-control button on the front of the server to start the
server.
vIf the server is turned on, a power failure occurs, and unattended-start mode is
enabled in the Configuration/Setup Utility program, the server will start
automatically when power is restored.
vIf ac power is present, the server is off, and the wake-up feature is enabled in
the Configuration/Setup Utility program, the wake-up feature will turn on the
server at the set time.
vIf ac power is present, the system is off, and the Wake on LAN feature is
enabled, the system can be turned on by a network wake-up frame from the
onboard Intel Ethernet controller.
vIf ac power is present, the system is off, and the system is connected to an ASM
interconnect network, which contains at least one system with an optional
Remote Supervisor Adapter installed, the system can be turned on from the
Remote Supervisor Adapter user interface.
vIf ac power is present, the system is off, and an optional Remote Supervisor
Adapter is installed in the system, the system can be turned on from the Remote
Supervisor Adapter user interface.
General information 9

Turning off the server
Turning off the server refers to the act of disconnecting the server from the power
source.
Statement 5:
CAUTION:
The power-control button on the device and the power switch on the power
supply do not turn off the electrical current supplied to the device. The device
also might have more than one power cord. To remove all electrical current from
the device, ensure that all power cords are disconnected from the power source.
1
2
You can turn off the server in any of the following ways:
vYou can press the power-control button on the front of the server. This starts an
orderly shutdown of the operating system, if this feature is supported by your
operating system.
Note: After performing an orderly shutdown, wait at least 5 seconds before you
press the power-control button to turn on the server again.
vYou might need to press and hold the power-control button for more than 4
seconds to cause an immediate shutdown of the server and to force the power
off. You can use this feature if the operating system stops functioning.
vIf the system was turned on by the wake-up feature or Wake on LAN feature,
you can turn it off by either a software runtime utility or by the fail-safe,
power-down counter.
vYou can disconnect the server power cords from the electrical outlets to shut off
all power to the server.
Note: After disconnecting the power cords, wait approximately 15 seconds for
your system to stop running. Watch for the power-on light to stop
blinking.
vIf the system is connected to an ASM interconnect network which contains at
least one system with a Remote Supervisor Adapter installed, the system can be
turned off from the Remote Supervisor Adapter user interface.
vIf a Remote Supervisor Adapter is installed in the system, the system can be
turned off from the Remote Supervisor Adapter user interface.
10 Hardware Maintenance Manual: xSeries 232, Type 8668

Operator information panel
The following illustration shows the location of the lights on the operator
information panel on the front of the server (see “Server controls and indicators”
on page 7).
OK
100
MB LINK
OK
TX
RX
Power-on
light
POST
complete light
SCSI hard
disk drive
in-use light
Information
light
System-error
light
Ethernet
speed light
Ethernet link
status light
Ethernet transmit/
receive activity light
Power-on light: This green LED lights when system power is present in the server.
When this light flashes, the server is in Standby mode (the system power supply is
turned off and current is present). If this light is not on, the power cord is not
connected, the power supply has failed, or this LED has failed.
POST complete light: This green LED lights when the server completes the
power-on self-test (POST).
SCSI hard disk drive in-use light: This green LED lights when there is activity on
a hard disk drive.
Information light: This amber LED lights when the information log contains
information about certain conditions in your server that might affect performance.
For example, the light will be on if your server has multiple power supplies and
does not have redundant power. An LED on the diagnostic panel on the system
board will also be on.
System-error light: This amber LED lights when a system error occurs. An LED on
the diagnostic panel on the system board may also be on to further isolate the
error. See “Identifying problems using status LEDs” on page 18.
Ethernet speed light: This green LED lights when the Ethernet LAN speed is 100
Mbps during typical operation, when the system is powered off the LED remains
lit.
Ethernet link status light: This green LED lights when there is an active
connection on the Ethernet port during typical operation, when the system is
powered off the LED remains lit.
Ethernet transmit/receive activity light: This green LED lights when there is
transmit or receive activity to or from the server.
General information 11

12 Hardware Maintenance Manual: xSeries 232, Type 8668