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One DS5020 and three or more EXP520 storage expansion
enclosures
To connect three or more storage expansion enclosures to a DS5020 storage
subsystem, alternately connect a storage expansion enclosure to one of the drive
ports of the dual-ported drive channel then connect to the other port until all of the
storage expansion enclosures are attached. Figure 48 shows the cabling scheme
for one DS5020 storage subsystem and three EXP520 storage expansion
enclosures behind both ports of a dual-ported drive channel.
Perform the following steps to create the cabling scheme shown in Figure 48:
1. Connect port 1A on the left ESM in EXP520 one to port 1B on the left ESM in
EXP520 three.
2. Connect port 1A on the right ESM in EXP520 three to port 1B on the right ESM
in EXP520 one.
3. Connect port 1B on the left ESM in EXP520 one to port 2 of drive channel 1 on
the DS5020.
1A
1B
DS5020
Port 2, drive channel 1
1A
1B
1A
1B
1A
1B
Port 1, drive channel 1
Port 1, drive channel 2
Port 2, drive channel 2
1A
1B
1A
1B
EXP520 one
EXP520 two
EXP520 three
Figure 48. One DS5020 and three EXP520 storage expansion enclosures behind a pair of
DS5020 drive ports
72 IBM System Storage DS5020 Storage Subsystem: Installation, User’s, and Maintenance Guide
- 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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