The 7320 storage controller chassis has the following boards installed.
PCIe Risers: The storage controller contains three PCIe risers that are customer-replaceable units (CRUs) and are attached to the rear of the motherboard. Each riser supports one PCIe card.
Motherboard: The motherboard is a FRU and includes CPU modules, slots for 18 DIMMs, memory control subsystems, and the service processor (SP) subsystem. The SP subsystem controls the host power and monitors host system events (power and environmental). The SP controller draws power from the host 3.3V standby supply rail, which is available whenever the system is receiving AC input power, even when the appliance is turned off.
Power Distribution Board: The power distribution board is a FRU and distributes main 12V power from the power supplies to the rest of the storage controller. It is directly connected to the paddle board and to the motherboard through a bus bar and ribbon cable. It also supports a top cover interlock kill switch.
Paddle Board: The paddle board is a FRU and serves as the interconnect between the power distribution board and the fan power boards, hard drive backplane, and I/O board.
Fan Board: The fan boards are FRUs and carry power to the storage controller fan modules. In addition, they contain fan module status LEDs and transfer I2C data for the fan modules.
Disk Backplane: The hard drive backplane is a FRU and includes the connectors for the hard disk drives, as well as the interconnect for the I/O board, Power and Locator buttons, and system/component status LEDs. The storage controller has an eight-disk backplane. Each drive has an LED indicator for Power/Activity, Fault, and OK-to-Remove (not supported).
The following list contains the replaceable system boards for the 7320 storage controller.
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7320 Replaceable Components - The following list contains all of the replaceable power distribution, disk, and fan module components of the 7320. Note that power supplies, disks, and fan modules are hot-pluggable on the storage controller.
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The following list contains the replaceable CPU and memory components of the 7320.
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7320 CPU and Memory Components - The storage controller motherboard has 18 slots in two groups that hold industry-standard DDR3 DIMM memory cards. All sockets must be occupied by either a filler or a DDR3 DIMM.
Figure 65 7320 Controller CPU and Memory Components
7320 Power Distribution and Fan Module Components - The following figure and legend identify the Power Distribution/Fan Module components of the storage controller.
Figure 66 7320 Controller Power Distribution and Fan Module Components
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7320 I/O Components - The following figure and legend identify the I/O components of the storage controller.
Figure 67 7320 Controller I/O Components
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7320 PCIe Cards and Risers - Following is the complete list of replaceable PCIe cards for the 7320 system.
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7320 Cables - The following list contains the replaceable cables for the 7320 storage controller.
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