Servicing the 7x20 Controller
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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.
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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.
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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.
TABLE 38
7320 Controller Replaceable System Boards
Part Number Description FRU/CRU
F541-2883-01 X8 PCIe Riser Card 1U CRU
F541-2885-01 X16 PCIe Riser Card 1U CRU
F541-4081-01 RoHS Motherboard and Tray FRU
F511-1489-01 DB, Power Distribution Board FRU
F511-1548-01 PCB, 8 Disk 1U Backplane FRU
F541-4275-02 PCBA, Connector Board, 1U FRU
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.
Servicing the Hardware 177
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