IBM DS4800 User Manual

Redundant host and drive loops . . . . . . . . . . . . . . . .93
Installing the storage subsystem configuration . . . . . . . . . . . . .96
Connecting the power cables . . . . . . . . . . . . . . . . . . . .96
Chapter 4. Operating the storage subsystem . . . . . . . . . . . . 101
Performing the DS4000 Health Check process . . . . . . . . . . . . . 102
Web pages . . . . . . . . . . . . . . . . . . . . . . . . . 103
Hardware responsibilities . . . . . . . . . . . . . . . . . . . . 103
Removing and replacing the front bezel . . . . . . . . . . . . . . . 104
Turning the storage subsystem on and off . . . . . . . . . . . . . . 104
Turning on the storage subsystem . . . . . . . . . . . . . . . . 105
Turning off the storage subsystem . . . . . . . . . . . . . . . . 108
Restoring power after an unexpected shutdown . . . . . . . . . . . .110
Performing an emergency shutdown . . . . . . . . . . . . . . . . 111
Restoring power after an emergency shutdown . . . . . . . . . . . . 111
Responding to the audible alarm . . . . . . . . . . . . . . . . . .113
Installing the DS4000 Storage Manager client . . . . . . . . . . . . .114
Firmware requirements . . . . . . . . . . . . . . . . . . . .114
Monitoring status through software . . . . . . . . . . . . . . . . .115
Firmware updates . . . . . . . . . . . . . . . . . . . . . .116
Troubleshooting the storage subsystem . . . . . . . . . . . . . .117
Checking the LEDs . . . . . . . . . . . . . . . . . . . . . . .118
Front bezel LEDs . . . . . . . . . . . . . . . . . . . . . .118
RAID controller LEDs . . . . . . . . . . . . . . . . . . . . . 120
Numeric display LEDs . . . . . . . . . . . . . . . . . . . . . 123
Power supply-fan LEDs . . . . . . . . . . . . . . . . . . . . 125
Interconnect-battery unit LEDs . . . . . . . . . . . . . . . . . . 127
Recovering from an overheated power supply and fan unit . . . . . . . . 129
Resetting the controller circuit breakers . . . . . . . . . . . . . . . 131
Cache memory and cache battery . . . . . . . . . . . . . . . . . 137
Cache memory . . . . . . . . . . . . . . . . . . . . . . . 137
Subsystem cache battery . . . . . . . . . . . . . . . . . . . 138
Chapter 5. Replacing components . . . . . . . . . . . . . . . . 141
Handling static-sensitive devices . . . . . . . . . . . . . . . . . . 141
Service Action Allowed status LED . . . . . . . . . . . . . . . . . 142
Single component failures . . . . . . . . . . . . . . . . . . . 142
Multiple component failures . . . . . . . . . . . . . . . . . . . 143
Releasing a component lever . . . . . . . . . . . . . . . . . . . 144
Replacing a controller . . . . . . . . . . . . . . . . . . . . . . 145
Upgrading controllers . . . . . . . . . . . . . . . . . . . . . . 150
Replacing a power supply and fan unit . . . . . . . . . . . . . . . . 152
Replacing the interconnect-battery unit . . . . . . . . . . . . . . . . 156
Replacing a backup battery pack . . . . . . . . . . . . . . . . . . 160
Replacing an SFP module . . . . . . . . . . . . . . . . . . . . 163
Installing SFPs and fiber-optic cables . . . . . . . . . . . . . . . . 166
Chapter 6. Hardware maintenance . . . . . . . . . . . . . . . . 167
General checkout . . . . . . . . . . . . . . . . . . . . . . . 167
Using the diagnostic hardware . . . . . . . . . . . . . . . . . . 167
Solving problems . . . . . . . . . . . . . . . . . . . . . . 167
Parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . 174
Appendix A. Additional DS4000 documentation . . . . . . . . . . . 177
DS4000 Storage Manager Version 9 library . . . . . . . . . . . . . . 177
DS4800 Storage Subsystem library . . . . . . . . . . . . . . . . . 178
Contents xi

IBM DS4800 Specifications

General

Brand	IBM
Model	DS4800
Category	Storage
Language	English