IBM System Storage Subsystem DS5020 - Manual (Page 7)

Host-agent (in-band) management method. . . . . . . . . . . . . 80
Direct (out-of-band) management method . . . . . . . . . . . . . 81
Connecting hosts to the DS5020 using Fibre Channel host ports . . . . . 82
Fibre Channel and iSCSI connections . . . . . . . . . . . . . . . 84
Fibre Channel host loop configurations . . . . . . . . . . . . . . . 85
Redundant Fibre Channel host loops . . . . . . . . . . . . . . . 85
iSCSI configurations . . . . . . . . . . . . . . . . . . . . . . 87
DS5020 host iSCSI configurations . . . . . . . . . . . . . . . . 88
Installing the storage subsystem configuration . . . . . . . . . . . . . 91
Cabling the ac power supply . . . . . . . . . . . . . . . . . . . . 91
Chapter 4. Operating the storage subsystem . . . . . . . . . . . . . 93
Performing the DS5020 Health Check process . . . . . . . . . . . . . 93
Web pages . . . . . . . . . . . . . . . . . . . . . . . . . 94
Hardware responsibilities . . . . . . . . . . . . . . . . . . . . 94
Powering on the storage subsystem . . . . . . . . . . . . . . . . . 95
Turning on the storage subsystem . . . . . . . . . . . . . . . . . 95
Installing the DS Storage Manager client . . . . . . . . . . . . . . . 97
Monitoring status through software
. . . . . . . . . . . . . . . . . 98
Finding controller, storage expansion enclosure, and drive information . . . 99
Firmware updates . . . . . . . . . . . . . . . . . . . . . . . 99
Troubleshooting the storage subsystem . . . . . . . . . . . . . . 100
Checking the LEDs . . . . . . . . . . . . . . . . . . . . . . . 101
AC power supply and fan unit LEDs . . . . . . . . . . . . . . . 101
Front LEDs . . . . . . . . . . . . . . . . . . . . . . . . . 102
Battery unit LEDs
. . . . . . . . . . . . . . . . . . . . . . 103
Controller LEDs . . . . . . . . . . . . . . . . . . . . . . . 104
Seven-segment numeric display LEDs . . . . . . . . . . . . . . . 107
Powering off the storage subsystem. . . . . . . . . . . . . . . . . 109
Turning off the storage subsystem . . . . . . . . . . . . . . . . 109
Performing an emergency shutdown
. . . . . . . . . . . . . . . 112
Restoring power after an unexpected shutdown . . . . . . . . . . . 112
Recovering from an overheated power supply and fan unit . . . . . . . . 114
Cache memory and cache battery
. . . . . . . . . . . . . . . . . 116
Cache memory . . . . . . . . . . . . . . . . . . . . . . . 116
Subsystem cache battery. . . . . . . . . . . . . . . . . . . . 117
Chapter 5. Replacing components . . . . . . . . . . . . . . . . 121
Handling static-sensitive devices . . . . . . . . . . . . . . . . . . 121
Service Action Allowed Status LED . . . . . . . . . . . . . . . . . 121
Replacing a controller . . . . . . . . . . . . . . . . . . . . . . 122
Working with hot-swap E-DDMs . . . . . . . . . . . . . . . . . . 126
Installing hot-swap E-DDMs. . . . . . . . . . . . . . . . . . . 128
Replacing hot-swap E-DDMs . . . . . . . . . . . . . . . . . . 130
Replacing multiple E-DDMs . . . . . . . . . . . . . . . . . . . 131
Replacing all E-DDMs at the same time . . . . . . . . . . . . . 132
Replacing the E-DDMs one at a time . . . . . . . . . . . . . . 134
Verifying the link rate setting . . . . . . . . . . . . . . . . . . . 136
Replacing an ac power supply and fan unit . . . . . . . . . . . . . . 139
Replacing a battery unit . . . . . . . . . . . . . . . . . . . . . 144
Replacing an SFP module . . . . . . . . . . . . . . . . . . . . 146
Replacing a midplane . . . . . . . . . . . . . . . . . . . . . . 149
Chapter 6. Hardware maintenance . . . . . . . . . . . . . . . . 153
General checkout . . . . . . . . . . . . . . . . . . . . . . . 153
Solving problems . . . . . . . . . . . . . . . . . . . . . . . 153
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