51. Ethernet and serial port locations on DS5020 ....................79
52. Host-agent (in-band) managed storage subsystems ..................80
53. Direct (out-of-band) managed storage subsystems ..................82
54. Location of host cables on RAID controllers on the DS5020 ...............83
55. Cabling diagram for two redundant host connections..................84
56. Examples of redundant host direct attached Fibre Channel SAN configurations ........85
57. Example of a single SAN fabric configuration ....................86
58. Example of a dual SAN fabric configuration .....................86
59. Example of two storage subsystems in a dual SAN environment .............87
60. Example of a two-cluster configuration .......................87
61. Example of a single-host, multiple-port configuration..................88
62. Example of a multiple-host, multiple-port configuration .................89
63. Example of iSCSI and Fibre Channel hosts, multiple-port configuration ...........89
64. Example of an incorrect configuration: Single-host, iSCSI and Fibre Channel.........90
65. Example of a multiple-host, multiple-port, multiple-switch configuration ...........91
66. Power supply and fan unit LEDs.........................102
67. Front LEDs and controls ...........................103
68. Battery unit LEDs ..............................104
69. LEDs, controls, and connectors of controllers with two standard Fibre Channel host expansion
channels .................................105
70. LEDs, controls, and connectors of controllers with two standard and two optional Fibre Channel
host expansion channels ...........................105
71. LEDs, controls, and connectors of controllers with two standard Fibre Channel host expansion
channels and two optional iSCSI host expansion channels ...............106
72. Numeric display LEDs ............................108
73. Cache Active LEDs .............................117
74. Battery unit LEDs ..............................119
75. Unlocking the SFP module latch - plastic variety...................124
76. Unlocking the SFP module latch - wire variety ...................124
77. Removing a controller from the DS5020 ......................125
78. Installing a controller .............................125
79. Hot-swap E-DDM LEDs ............................129
80. E-DDM CRU handle .............................129
81. Link rate LEDs ...............................137
82. Link rate switch ...............................138
83. Replacing a power supply and fan unit ......................143
84. Removing and replacing a battery unit from the controller chassis ............145
85. Replacing an SFP module ...........................148
86. Front cage frame screw locations ........................150
87. Screws holding the top and bottom sides of the chassis to the cage frame .........151
88. DS5020 storage subsystem parts list .......................160
89. Front rack mounting template..........................168
90. Rear rack mounting template ..........................169
91. TopView of non-IBM Rack Specifications Dimensions .................174
92. Rack specifications dimensions, top front view ...................175
93. Rack specifications dimensions, bottom front view ..................175
xIBM System Storage DS5020 Storage Subsystem: Installation, User’s, and Maintenance Guide