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Redundancy, 1.9 Light path diagnostics, To ensure adequate power

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1.8 Redundancy The x455 has the following redundancy features to maintain high availability: Four hot-swap multi-speed fans. With four hot-swap redundant fans, the x455 has adequate cooling for each of its major component areas. There are 2 fans located at the front of the server that direct air through the memory-board assembly and processor-board assembly. These fans are accessible from the top of the server without having to open the system panels. In the event of a fan failure, the other fan will speed up to continue to provide adequate cooling until the fan can be hot-swapped. The other two fans are located just behind the power supplies and provide cooling for the I/O devices. Similar to the SMP Expansion Module fans, these fans will speed up in the event that one should fail and will compensate for the reduction in air flow. In general, failed fans should be replaced within 24 hours following failure. Due to airflow requirements, fans should not be removed for longer than two minutes. The fan compartments need to be fully populated even if the fan is defective. Therefore, remove a defective fan only when a new fan is available for immediate replacement Two hot-swap power supplies with separate power cords. For large configurations, redundancy is achieved only when connected to a 220 V power supply. See 3.5, "Power considerations" on page 87 for details. To ensure adequate power, a UPS with a rating of RMB 5000 or more is recommended. Two hot-swap hard disk drive bays. Using either the onboard LSI chipset or a ServeRAID adapter, these drives can be configured to form a RAID-1 disk array for the operating system. The memory subsystem has a number of redundancy features, including memory mirroring, as described in "System memory" on page 14. The layout of the front panel of the x455, showing the location of the four fans, two drive bays, and two power supplies is shown in Figure 1-1 on page 5. 1.9 Light path diagnostics To limit the need to slide the server out of the rack to diagnose problems, a light path diagnostics panel has been incorporated in the front of the x455, as shown in Figure 1-15. This panel can be ejected from the server to view all light path Chapter 1. Technical description 27

Section	Page
Front cover	1
Contents	5
Notices	9
Trademarks	10
Preface	11
The team that wrote this redbook	11
Become a published author	13
Comments welcome	14
Chapter 1. Technical description	15
1.1 Features	16
1.1.1 Comparing the x455 with the x450	16
1.1.2 Features not supported	17
1.2 The x455 base models	18
1.2.1 Front and rear views	18
1.3 System assembly	20
1.4 IBM XA-64 chipset	21
1.4.1 The processor-board assembly	23
1.4.2 The memory-board assembly	27
1.4.3 PCI-X board assembly	31
1.5 Remote Supervisor Adapter	33
1.6 RXE-100 Expansion Enclosure	35
1.7 Multinode scalable partitions	36
1.7.1 RXE-100 connectivity	38
1.7.2 Multinode configuration	39
1.7.3 Integrated I/O function support	40
1.7.4 Error recovery	40
1.8 Redundancy	41
1.9 Light path diagnostics	41
1.10 Extensible Firmware Interface	43
1.10.1 GUID Partition Table disk	45
1.10.2 EFI System Partition	47
1.10.3 EFI and the reduced-legacy concept	48
1.11 Operating system support	49
1.12 Enterprise X-Architecture	49
1.12.1 NUMA architecture	50
Chapter 2. Positioning	53
2.1 Migrating to a 64-bit platform	54
2.2 Scalable system partitioning	55
2.2.1 RXE-100 Expansion Enclosure	56
2.3 Operating system support	56
2.4 Server consolidation	57
2.5 ServerProven®	58
2.6 IBM Datacenter Solution Program	59
2.7 Application solutions	60
2.7.1 Database applications	60
2.7.2 Business logic	62
2.7.3 e-Business and security transactions	64
2.7.4 In-house developed compute-intensive applications	65
2.7.5 Science and technology industries	65
2.8 Why choose x455	66
Chapter 3. Planning	69
3.1 System hardware	70
3.1.1 Processors	70
3.1.2 Memory	71
3.1.3 PCI-X slot configuration	75
3.1.4 Broadcom Gigabit Ethernet controller	78
3.2 Cabling and connectivity	79
3.2.1 SMP Expansion connectivity	81
3.2.2 Remote Expansion Enclosure connectivity	84
3.2.3 Remote Supervisor Adapter connectivity	90
3.2.4 Serial connectivity	92
3.3 Storage considerations	93
3.3.1 xSeries storage solutions	93
3.3.2 Tape backup	98
3.4 Rack installation	99
3.5 Power considerations	101
3.6 Operating system support	101
3.6.1 Clustering	102
3.7 IBM Director support	103
3.8 Solution Assurance Review	104
3.8.1 Trigger Tool	104
3.8.2 Electronic Solution Assurance Review (eSAR)	104
Chapter 4. Installation	105
4.1 Using The Extensible Firmware Interface	106
4.1.1 EFI Firmware Boot Manager	107
4.1.2 The EFI shell	109
4.1.3 Driver Setup	117
4.1.4 Flash update	126
4.1.5 Configuration/Setup utility	132
4.1.6 Diagnostic utility	135
4.1.7 Boot Option Maintenance	136
4.2 Configuring scalable partitions	145
4.2.1 Creating a scalable partition	145
4.2.2 Booting a scalable partition	148
4.2.3 Multiple Monitors	149
4.2.4 Deleting a scalable partition	150
4.3 Installing Windows Server 2003	150
4.3.1 Important information	150
4.3.2 Preparing to install	152
4.3.3 Installation	153
4.3.4 Post-setup phase	158
4.4 Installing Linux	165
4.4.1 Linux IA-64 kernel overview	166
4.4.2 Choosing a Linux distribution	167
4.4.3 Installing SUSE LINUX Enterprise Server 8.0	170
4.4.4 Installing Red Hat Enterprise Linux AS	174
4.4.5 Linux boot process	176
4.4.6 Information about the installed system	177
4.4.7 Using the serial port for the Linux console	185
4.4.8 RXE-100 Expansion Enclosure	186
4.4.9 Upgrading drivers	187
Chapter 5. Management	189
5.1 IBM Director	190
5.1.1 Scalable Systems Manager	191
5.2 The Remote Supervisor Adapter	191
5.2.1 Connecting via a Web browser	193
5.2.2 Connecting via the ASM interconnect	198
5.2.3 Installing the device driver	199
5.2.4 Configuring the remote control password	200
5.3 Management using the Remote Supervisor Adapter	201
5.3.1 Configuring which alerts to monitor	202
5.3.2 Configuring SNMP	204
5.3.3 Sending alerts directly to IBM Director	205
5.3.4 Creating a test event action plan in IBM Director	207
5.4 Windows System Resource Manager	210
5.4.1 WSRM description	211
5.4.2 WSRM features	212
5.4.3 WSRM in the x455	213
Abbreviations and acronyms	215
Related publications	217
IBM Redbooks	217
Other publications	217
Online resources	218
How to get IBM Redbooks	222
Help from IBM	222
Index	223

Match case Limit results 1 per page

Chapter 1. Technical description

1.8

Redundancy

The x455 has the following redundancy features to maintain high availability:

Four hot-swap multi-speed fans.

With four hot-swap redundant fans, the x455 has adequate cooling for each of

its major component areas. There are 2 fans located at the front of the server

that direct air through the memory-board assembly and processor-board

assembly. These fans are accessible from the top of the server without having

to open the system panels. In the event of a fan failure, the other fan will

speed up to continue to provide adequate cooling until the fan can be

hot-swapped.

The other two fans are located just behind the power supplies and provide

cooling for the I/O devices. Similar to the SMP Expansion Module fans, these

fans will speed up in the event that one should fail and will compensate for the

reduction in air flow. In general, failed fans should be replaced within 24 hours

following failure.

Due to airflow requirements, fans should not be removed for longer than two

minutes. The fan compartments need to be fully populated even if the fan is

defective. Therefore, remove a defective fan only when a new fan is available

for immediate replacement

Two hot-swap power supplies with separate power cords.

For large configurations, redundancy is achieved only when connected to a

220 V power supply. See 3.5, “Power considerations” on page 87 for details.

To ensure adequate power, a UPS with a rating of RMB 5000 or more is

recommended.

Two hot-swap hard disk drive bays. Using either the onboard LSI chipset or a

ServeRAID adapter, these drives can be configured to form a RAID-1 disk

array for the operating system.

The memory subsystem has a number of redundancy features, including

memory mirroring, as described in “System memory” on page 14.

The layout of the front panel of the x455, showing the location of the four fans,

two drive bays, and two power supplies is shown in Figure 1-1 on page 5.

1.9

Light path diagnostics

To limit the need to slide the server out of the rack to diagnose problems, a light

path diagnostics panel has been incorporated in the front of the x455, as shown

in Figure 1-15. This panel can be ejected from the server to view all light path