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Power Verification and Addressing
4–6 UltraSCSI RAID Enclosure
Monitoring Power Supply Operations
Even with four operational power supplies, it is possible that a power
supply problem might cause one or both of the dc voltages to be too
low. Both the PVA and the EMU monitor power supply operations to
ensure that the dc voltages are within the ranges specified in Table
4–1.
With at least four operational power supplies, the minimum voltage
levels sufficient to run the system are present. Fewer than four
operational power supplies cannot maintain the minimum voltages. If
this occurs, the EMU notifies the array controllers so they can shut
down before standby power mode is initiated.
Caution
Some array controllers bypass the standby power mode
functionality from the PVA standby power switch. Refer to
the array controller documentation for availability of this
feature.
Note
The EMU monitors the system dc voltages and I/O module
+5 V dc TERMPOWER. The PVA only monitors the
system dc voltages.
Table 4–1 DC Voltage Ranges
Nominal Voltage
+5 V dc +12 V dc
Minimum Voltage
+4.7 V dc +11.4 V dc
- Compaq StorageWorks 1
- UltraSCSI RAID Enclosure 1
- (DS–BA370 Series) 1
- User's Guide 1
- Table of Contents 3
- Chapter 6, Power Distribution 6
- Chapter 7, Storage Devices 6
- Chapter 8, Enclosure Blowers 7
- List of Figures 10
- List of Tables 11
- Intended Audience 13
- Structure 13
- Documentation Conventions 15
- Related Documents 16
- Manufacturer’s Declarations 19
- Acoustic Noise Declarations 20
- Introducing the UltraSCSI 23
- RAID Enclosure 23
- CXO6264A 25
- An UltraSCSI Bus Overview 26
- Product Description 27
- Figure C 28
- 1. SCSI bus 28
- UltraSCSI RAID Subsystem 29
- Master Enclosure 30
- Master EMU 30
- Expansion Enclosure 30
- Expansion EMU 31
- I/O Module 31
- SCSI Bus Controller 31
- Enclosure Status 32
- For Both Figures 33
- Dual Controllers 35
- UltraSCSI Bus Expansion 35
- Operating the UltraSCSI 37
- Enclosure 37
- UltraSCSI RAID Controllers 38
- UltraSCSI Nodes 39
- CXO5926A 40
- Starting the Subsystem 41
- Applying Power 42
- Turning On the Subsystem 43
- Shutting Down the Subsystem 44
- FF the dc power 45
- Turning Off the Subsystem 46
- Fault Detection 48
- Enclosure Status Indicators 49
- For Figures 50
- LED is O 51
- ALLOUT 2) is ON when the 52
- ALLOUT 1) is ON or 53
- ALLOUT 3) are 54
- FF when the bus is 54
- N or FLASHING indicates 54
- CXO6303A 55
- ALLOUT 2) and external 56
- Environmental Monitoring 57
- FF. When any 59
- FF the enclosure 59
- I/O Module Status 60
- FF and initiates a fault 61
- Configuring the EMU 63
- EMU Firmware 64
- EMU Firmware Version 1.2 65
- Environmental Monitoring Unit 67
- EMU Status Reporting 70
- ALLOUT 2, Figure 71
- FF until one of the 71
- EMU Status LEDs 72
- N. Refer to Figure 3–5 as 74
- CXO6546A 76
- LASHING alarm control 77
- CXO6598A 78
- CXO5762A 79
- CXO5763A 80
- CXO5770A 82
- CXO5773A 83
- Replacing an EMU 84
- CXO-5497A-MC 85
- CXO5754B 85
- CXO5820A 86
- Power Verification and 87
- Addressing 87
- CXO-5737A 87
- Functions 89
- PVA Operation 90
- Nominal Voltage 92
- +5 V dc +12 V dc 92
- Minimum Voltage 92
- +4.7 V dc +11.4 V dc 92
- Setting the Enclosure Address 93
- CXO-4840A-MC 94
- Replacing a PVA 98
- Table 4–7 Installing a PVA 100
- CXO5488B 101
- Single-Ended I/O Module 103
- CXO5805B 104
- Single-Ended I/O Module 104
- FF the enclosure power 105
- FF without 107
- N during normal operation 108
- CXO5819A 110
- CXO5702A 112
- CXO5816A 114
- N the subsystem 117
- CXO5854B 119
- Replacing an I/O Module 123
- Replacing an Expansion Cable 125
- Power Distribution 127
- Power System Overview 128
- AC Power Source 129
- AC Input Box 130
- Shelf Power Supplies 131
- ALLOUT 1), Compaq recommends 132
- Redundant (n+4) Power Supply 134
- Configurations 134
- Error Condition Reporting 136
- Replacing a Power Supply 138
- Power Distribution 140
- Replacing an AC Input Box 143
- Storage Devices 147
- Identifying a Storage Device 148
- Storage Devices 150
- The SBB Connector 152
- LASHING 154
- Replacing a Disk Drive SBB 155
- CXO-5338A-MC 157
- CXO-4562A-MC 158
- Enclosure Blowers 161
- Enclosure Blowers 162
- Function and Operation 163
- FF the dc power distribution 164
- CXO5753B 165
- UltraSCSI Enclosure 167
- Specifications 167
- CXO5797A 168
- Operating Environments 169
- Condition Specification 170
- Altitude 4900 m (16,000 ft) 170
- SBB Thermal Stabilization 171
- Appendix B 173
- Installation Sequence 174
- Installing the EMU 175
- Installing the PVA 175
- CXO5798A 177
- 3) in the 178
- (Continued) 179
- Installing the Power System 181
- Connecting Subsystem Cables 182
- Configuring the Subsystem 182
- Appendix C 183
- Prerequisites 184
- Preliminary Procedure 184
- Installing EMU Microcode 185
- Preparing the EMU 186
- Loading the Microcode 186
- Restarting the Controller 188
- Glossary 189
- Glossary 190
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