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NOTE: The green wire ground conductor mentioned above may be a black wire marked with
green tape. [LAHJ]
Computer Safety Ground
Ground all computer equipment with the green (green/yellow) wire included in the branch
circuitry. The green (green/yellow) wire ground conductors should be connected to the appropriate
power panel and should be sized per applicable codes (based on circuit over current device
ratings).
Cabinet Performance Grounding (High Frequency Ground)
Signal interconnects between system cabinets require high frequency ground return paths.
Connect all cabinets to site ground.
NOTE: In some cases power distribution system green (green/yellow) wire ground conductors
are too long and inductive to provide adequate high frequency ground return paths. Therefore,
a ground strap (customer-supplied) should be used for connecting the system cabinet to the site
grounding grid (customer-supplied). When connecting this ground, ensure that the raised floor
is properly grounded for high frequency.
Power panels located in close proximity to the computer equipment should also be connected
to the site grounding grid. Methods of providing a sufficiently high frequency ground grid are
described in the next sections.
Raised Floor "High Frequency Noise" Grounding
If a raised floor system is used, install a complete signal grounding grid for maintaining equal
potential over a broad band of frequencies. The grounding grid should be connected to the
equipment cabinet and electrical service entrance ground at multiple connection points using a
minimum #6 AWG (16mm2) wire ground conductor. The following figure illustrates a metallic
strip grounding system.
Hewlett-Packard recommends the following approaches:
• Excellent—Add a grounding grid to the subfloor. The grounding grid should be made of
copper strips mounted to the subfloor. The strips should be 0.032 in. (0.08 cm) thick and a
minimum of 3.0 in. (8.0 cm) wide.
Connect each pedestal to four strips using 1/4 in. (6.0 mm) bolts tightened to the
manufacturer's torque recommendation.
• Better - A grounded #6 AWG minimum copper wire grid mechanically clamped to floor
pedestals and properly bonded to the building/site ground.
• Good—Use the raised floor structure as a ground grid. In this case, the floor must be designed
as a ground grid with bolted down stringers and corrosion resistive plating (to provide low
resistance and attachment points for connection to service entrance ground and hp computer
equipment). The use of conductive floor tiles with this style of grid further enhances ground
performance.
146 General Site Preparation Guidelines
- User Guide 1
- Table of Contents 3
- 4 Table of Contents 4
- Table of Contents 5 5
- 6 Table of Contents 6
- Table of Contents 7 7
- List of Figures 8
- List of Tables 9
- List of Examples 10
- What's New? 11
- Printing History 11
- 1 Server Overview 13
- Unpacking the server 17
- Install Deskside Server 19
- A5575AE-Series HP Cabinet 25
- Identifying Static Rail Kit 26
- Installing Stationary Rails 26
- Additional Components 29
- Installing Memory 29
- Installing rp5470 DIMMs 31
- Installing a PCI Card 36
- Installing Graphics 38
- Installing Graphics 39 39
- Installing Graphics 41 41
- Graphics Troubleshooting 42
- Installing Disk Drives 43
- 4 Cable Connections 45
- Revision B GSP 46
- GSP RS-232 48
- GSP Features 48
- Revision A GSP 48
- Configure System Consoles 49
- GSP Cables 50
- Configure RS-232 Console 50
- Configure System Consoles 51 51
- 52 Cable Connections 52
- Configure Remote Console 53
- Configure the LAN Console 53
- 54 Cable Connections 54
- Configure the Web Console 55
- 56 Cable Connections 56
- Configure System Consoles 57 57
- 58 Cable Connections 58
- GSP Configurable Parameters 60
- Removing Users 61
- GSP> dc 62
- Initial Power-up 64
- 66 Cable Connections 66
- 5 Utilities 67
- Configuring the GSP LAN Port 69
- Adding Users 69
- 6 Troubleshooting 73
- Chassis Code to FRU Decode 75
- Power Supply Failure Example 77
- Processor Failure Example 77
- Interpreting System Alerts 78
- Sample System Alert 79
- Accessing Error Chassis Logs 80
- Chassis Code to FRU Decode 81 81
- 82 Troubleshooting 82
- 84 Troubleshooting 84
- 86 Troubleshooting 86
- 88 Troubleshooting 88
- PCI I/O LED States 89
- 90 Troubleshooting 90
- Expansion I/O LED States 91
- 92 Troubleshooting 92
- GSP LED States 93
- 94 Troubleshooting 94
- LAN/SCSI LED States 95
- 96 Troubleshooting 96
- Cardcage Fan 97
- Core I/O 97
- HotSwap Chassis Fan 97
- Disk Drive 97
- Display Board 98
- Front Bezel 98
- Memory DIMM 98
- PCI I/O Card 98
- Power Supply 99
- HotSwap Power Converter Fan 99
- Platform Monitor 99
- Processor Support Module 99
- Top Cover Removal 102
- Top Cover Replacement 103
- Side Cover Removal 104
- Side Cover Replacement 104
- Core I/O Removal 108
- Core I/O Replacement 108
- HotPlug Disk Drive Removal 110
- HotSwap Software Procedure 111
- HotPlug Hardware Procedure 113
- Hardware HotPlug Procedure 114
- HotSwap Chassis Fan Removal 118
- HotSwap Card Cage Fan Removal 119
- HotSwap Power Supply Removal 120
- Memory DIMM Removal 123
- Memory DIMM Replacement 124
- Display Board Removal 125
- Display Board Replacement 126
- Platform Monitor Removal 127
- Platform Monitor Replacement 128
- PCI I/O Card Removal 129
- PCI I/O Card Replacement 130
- A Parts and Accessories 133
- Table A-2 Non-Exchange CRUs 135
- B System Specifications 137
- Electrical 138
- Power Protection 139
- Modular PDUs 139
- LAN and Telephone 140
- Acoustic Safety Standards 140
- Altitude Operation Standards 141
- Electrical Factors 143
- Power Consumption 144
- Power Quality 144
- Distribution Hardware 145
- Grounding Systems 145
- Wiring Connections 147
- Environmental Elements 148
- Air Conditioning System Types 149
- Humidity Level 150
- Dust and Pollution Control 150
- Environmental Elements 151 151
- Facility Characteristics 152
- Raised Floor Loading 153
- Floor Loading Terms 153
- Average Floor Loading 153
- Typical Raised Floor Site 153
- Space Requirements 154
- Typical Installation Schedule 155
- Site Inspection 155
- Delivery Survey 157
- Delivery Survey 159 159
- 162 Index 162
- Wiring Connections, 147 163
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