51. Ethernet and serial port locations on DS5020 ....................81
52. Host-agent (in-band) managed storage subsystems ..................83
53. Direct (out-of-band) managed storage subsystems ..................84
54. Location of host cables on RAID controllers on the DS5020 ...............85
55. Cabling diagram for two redundant host connections..................86
56. Examples of redundant host direct attached Fibre Channel SAN configurations ........88
57. Example of a single SAN fabric configuration ....................88
58. Example of a dual SAN fabric configuration .....................89
59. Example of two storage subsystems in a dual SAN environment .............89
60. Example of a two-cluster configuration .......................90
61. Example of a single-host, multiple-port configuration ..................91
62. Example of a multiple-host, multiple-port configuration .................91
63. Example of iSCSI and Fibre Channel hosts, multiple-port configuration ...........92
64. Example of an incorrect configuration: Single-host, iSCSI and Fibre Channel.........93
65. Example of a multiple-host, multiple-port, multiple-switch configuration ...........94
66. Power supply and fan unit LEDs.........................104
67. Front LEDs and controls ...........................105
68. Battery unit LEDs ..............................106
69. LEDs, controls, and connectors of controllers with two standard Fibre Channel host expansion
channels .................................107
70. LEDs, controls, and connectors of controllers with two standard and two optional Fibre Channel
host expansion channels ...........................107
71. LEDs, controls, and connectors of controllers with two standard Fibre Channel host expansion
channels and two optional iSCSI host expansion channels ...............108
72. Numeric display LEDs ............................110
73. Cache Active LEDs .............................119
74. Battery unit LEDs ..............................121
75. Unlocking the SFP module latch - plastic variety ...................126
76. Unlocking the SFP module latch - wire variety ...................126
77. Removing a controller from the DS5020 ......................127
78. Installing a controller .............................127
79. Inserting a hard disk drive into a drive slot .....................129
80. Inserting a hard disk drive into the connector ....................129
81. Hot-swap E-DDM LEDs ............................132
82. E-DDM CRU handle .............................133
83. Link rate LEDs ...............................141
84. Link rate switch ...............................142
85. Replacing a power supply and fan unit ......................146
86. Removing and replacing a battery unit from the controller chassis ............148
87. Replacing an SFP module ...........................151
88. Front cage frame screw locations ........................153
89. Screws holding the top and bottom sides of the chassis to the cage frame .........154
90. DS5020 storage subsystem parts list .......................166
91. An IBM hologram label example.........................170
92. Front rack mounting template ..........................176
93. Rear rack mounting template ..........................177
94. Top View of non-IBM Rack Specifications Dimensions.................182
95. Rack specifications dimensions, top front view ...................183
96. Rack specifications dimensions, bottom front view ..................183
x IBM System Storage DS5020 Storage Subsystem: Installation, User’s, and Maintenance Guide
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