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Important: Do not cable the DS5020 storage subsystem and two storage
expansion enclosures as shown in Figure 39. A storage array with the
incorrect storage topology might appear to be functional, but incorrect
cabling can potentially have unpredictable results.
DS5020
Port 2, drive channel 1
Port 1, drive channel 1
Port 1, drive channel 2
Port 2, drive channel 2
1A
1B
1A
1B
1A
1B
1A
1B
Figure 39. Incorrect cabling of one DS5020 and two storage expansion enclosures
Chapter 3. Cabling the storage subsystem 61
- First Edition (July 2009) 4
- Contents 5
- Contents v 7
- Contents vii 9
- © Copyright IBM Corp. 2009 ix 11
- © Copyright IBM Corp. 2009 xi 13
- Safety xv 17
- Safety xvii 19
- Cable Warning: 20
- About this document 21
- General overview 22
- About this document xxi 23
- About this document xxiii 25
- Before you call 26
- Using the documentation 26
- Web sites 27
- Software service and support 28
- Hardware service and support 28
- Fire suppression systems 29
- Chapter 1. Introduction 31
- Base DS5020 features 32
- Operating system support 33
- Fibre Channel defined 33
- SATA defined 33
- Inventory checklist 33
- Best practices guidelines 35
- Storage subsystem components 36
- Chapter 1. Introduction 7 37
- Controllers 38
- Chapter 1. Introduction 9 39
- Controller B 40
- Chapter 1. Introduction 11 41
- AC power supply and fan units 43
- Battery units 44
- Figure 7. Backup battery unit 45
- SFP modules 46
- Chapter 1. Introduction 17 47
- Determining firmware levels 48
- 44.70 cm (17.60 in.) 49
- 12.95 cm (5.1 in.) 49
- 57.15 cm (22.5 in.) 49
- 48.26 cm (19.00 in.) 49
- Shipping dimensions 50
- Temperature and humidity 50
- Altitude 51
- Airflow and heat dissipation 51
- Acoustic noise 52
- Electrical requirements 53
- Chapter 1. Introduction 25 55
- Installation overview 57
- Ser i al n u m b er 58
- Machine type 58
- Model number 58
- Preparing for installation 59
- Tools and hardware required 61
- Preparing the site 61
- Preparing the rack cabinet 62
- Installing the support rails 62
- Installing the DS5020 66
- Removing the CRUs 66
- Removing a controller 67
- Removing an E-DDM 69
- Front of Rack 71
- M5 screws 71
- M4 screws 71
- Replacing an E-DDM 74
- Enclosure ID settings 75
- Enclosure ID 76
- Handling fiber-optic cables 77
- Installing SFP modules 78
- Removing SFP modules 80
- Protective cap 83
- Fibre-optic 83
- Redundant drive channel pair 85
- Redundant 86
- Drive Channel 86
- Port 2, drive channel 1 100
- Port 1, drive channel 1 100
- Port 1, drive channel 2 100
- Port 2, drive channel 2 100
- Host portsController A 113
- Host ports Controller B 113
- Host 1, Host Adapter 1 and 2 114
- Host 2, Host Adapter 1 and 2 114
- Cabling the ac power supply 121
- © Copyright IBM Corp. 2009 93 123
- Web pages 124
- Hardware responsibilities 124
- Firmware updates 129
- Checking the LEDs 131
- Front LEDs 132
- Battery unit LEDs 133
- Controller LEDs 134
- Seven-segment 138
- Diagnostic 138
- Cache memory 146
- Subsystem cache battery 147
- Figure 74. Battery unit LEDs 149
- Replacing a controller 152
- Class 1 Laser Product 153
- Laser Klasse 1 153
- Laser Klass 1 153
- Luokan 1 Laserlaite 153
- Apparell Laser de Calsse 1À 153
- Pro t ect i ve cap 154
- SFP m o d u l e 154
- Plastic tab 154
- Guide pin 155
- Working with hot-swap E-DDMs 156
- Installing hot-swap E-DDMs 158
- Tr ay h a n d l e 159
- Tr ay l a t c h 159
- Replacing hot-swap E-DDMs 160
- Replacing multiple E-DDMs 161
- Two on = 4 Gbps 167
- One on = 2 Gbps 167
- Link Rat e sw it ch 168
- (2 Gbps or 4 Gbps) 168
- Replacing a battery unit 174
- Replacing an SFP module 176
- Replacing a midplane 179
- Front cage frame screws 180
- Sc r e w 181
- Sc r e w s 181
- General checkout 183
- Solving problems 183
- Parts listing 190
- Appendix A. Records 193
- Sample information record 195
- Installed device records 196
- Rack Mounting 199
- Template 199
- Rack specifications 203
- EIA Hole Spacing 205
- Appendix D. Power cords 209
- Appendix D. Power cords 181 211
- Appendix F. Accessibility 225
- Trademarks 227
- Important notes 228
- Particulate contamination 229
- Documentation format 229
- Notices 201 231
- Glossary 233
- Glossary 205 235
- Glossary 207 237
- Glossary 209 239
- Glossary 211 241
- Index 215 245
- Index 217 247
- Part Number: 49Y0289 250
- Printed in USA 250
- (1P) P/N: 49Y0289 250
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