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© Copyright IBM Corp. 2014. All rights reserved. 23
Draft Document for Review May 12, 2014 12:46 pm 5102ch02.fm
Chapter 2. Architecture and technical
overview
This chapter discusses the overall system architecture for the Power S822. The bandwidths
that are provided throughout the section are theoretical maximums used for reference.
The speeds shown are at an individual component level. Multiple components and application
implementation are key to achieving the best performance.
Always do the performance sizing at the application workload environment level and evaluate
performance using real-world performance measurements and production workloads.
2
- Redpaper 1
- Introduction 3
- April 2014 3
- First Edition (April 2014) 4
- Contents 5
- Contents v 7
- Trademarks 10
- Comments welcome 13
- General description 15
- 1.2 Operating environment 16
- 1.3 Physical package 17
- 1.4 System features 18
- 1.4.2 Minimum features 19
- 1.4.3 Power supply features 19
- 1.4.5 Memory features 20
- 1.4.6 PCIe slots 20
- 1.5 Disk and media features 21
- 1.8 System racks 26
- Rear Door Heat Exchanger 28
- 1.8.4 Feature code 0551 rack 29
- 1.8.5 Feature code 0553 rack 29
- 1.8.6 Feature code ER05 rack 29
- Rack Rear View 30
- Circuit breaker reset 30
- Status LED 30
- 1.8.8 Rack-mounting rules 32
- 1.8.9 Useful rack additions 32
- Flat panel display options 34
- 1.8.10 OEM rack 35
- EIA Hole Spacing 36
- Architecture and technical 37
- 2.1 The IBM POWER8 processor 38
- Mem. Ctrl 39
- 2.1.2 POWER8 processor core 41
- 2.1.4 Memory access 43
- Idle Power Saver 47
- 2.2 Memory subsystem 48
- 2.2.1 Custom DIMM (CDIMM) 49
- 2.2.2 Memory placement rules 50
- 2.2.3 Memory bandwidth 52
- 2.3 System Bus 53
- 2.4 Internal I/O subsystem 54
- 2.5 PCI adapters 57
- 2.5.2 LAN adapters 58
- 5102ch02.fm 59
- 2.5.4 SAS adapters 60
- 2.5.6 Fibre Channel adapters 61
- FC Switch 62
- Ethernet Switch 62
- FCoE Switch 62
- 2.5.11 FPGA Adapters 64
- 2.6 Internal storage 65
- 2.6.1 RAID support 69
- Supported RAID functions 70
- 2.6.2 Easy Tier 71
- 2.6.3 External SAS port 73
- 2.6.4 Media bays 73
- 2.7 External I/O subsystems 74
- 2.8 External disk subsystems 74
- 2.8.2 IBM System Storage 76
- 2.9.1 HMC code level 77
- 2.9.2 HMC RAID 1 support 78
- HMC models 78
- Management LAN 80
- SYSTEM A SYSTEM B 81
- 2.10.1 AIX operating system 82
- 2.10.3 Virtual I/O Server 83
- 2.11 Energy management 84
- 2.11.2 On Chip Controller 87
- Virtualization 89
- 3.1 POWER Hypervisor 90
- Virtual Ethernet 91
- Virtual Fibre Channel 92
- Virtual (TTY) console 92
- 3.2 POWER processor modes 93
- 3.3 Active Memory Expansion 95
- Chapter 3. Virtualization 83 97
- 5.5 true 98
- 3.4 PowerVM 99
- 3.4.1 PowerVM editions 100
- 3.4.2 Logical partitions 100
- Chapter 3. Virtualization 87 101
- Processing mode 102
- Dedicated mode 102
- Shared dedicated mode 102
- Shared mode 102
- Chapter 3. Virtualization 89 103
- 3.4.4 Virtual I/O Server 104
- Shared Ethernet Adapter 105
- Virtual SCSI 106
- N_Port ID Virtualization 107
- Virtual I/O Server functions 107
- 3.4.6 Active Memory Sharing 109
- 3.4.9 Linux support 111
- 5102ch03.fm 113
- 3.5 System Planning Tool 115
- 3.6 IBM PowerVC 117
- 3.7 IBM PowerVP 117
- 3.8 VIOS 2.2.3 features 119
- Continuous availability and 121
- 4.1 Reliability 122
- 4.2 Availability 123
- Persistent deallocation 124
- Processor instruction retry 124
- Alternate processor retry 125
- Single processor checkstop 125
- 4.2.3 Memory protection 126
- POWER8 memory subsystem 127
- Memory page deallocation 127
- 4.2.4 Cache protection 128
- 4.3 Serviceability 130
- Service processor 131
- Error checkers 133
- Fault isolation registers 133
- First-failure data capture 133
- 4.3.2 Diagnosing 134
- Host Boot IPL 135
- Run time 135
- Device drivers 135
- 4.3.3 Reporting 136
- Service Focal Point (SFP) 137
- Extended error data 137
- System-dump handling 137
- 4.3.4 Notifying 138
- 4.3.5 Locating and servicing 139
- Service labels 140
- The operator panel 140
- Concurrent maintenance 140
- 4.4 Manageability 141
- Operating system service menu 144
- Firmware entitlement 145
- Firmware updates 146
- Firmware update steps 147
- Electronic Services news page 149
- Electronic Service Agent 150
- Service Event Manager 151
- 4.5 POWER8 RAS enhancements 153
- 4.6 Power-On Reset Engine 154
- 5102ch04.fm 155
- Related publications 159
- Other publications 160
- Online resources 161
- Help from IBM 161
- IBM Power System S822 164
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