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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