Internal Boards; Components - Oracle Sun ZFS Service Manual

7420
Figure Legend
7 Cluster card slot

Internal Boards

The 7420 storage controller chassis has the following boards installed. Field-replaceable units
(FRUs) should only be replaced by trained Oracle service technicians.
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DIMM risers, 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's 3.3V standby supply rail,
which is available whenever the system is receiving AC input power, even when the system is
turned off.
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12V power from the power supplies to the rest of the system. It is directly connected to the
Vertical PDB card, and to the motherboard through a bus bar and ribbon cable. It also
supports a top cover interlock ("kill") switch. In the storage controller, the power supplies
connect to the power supply backplane which connects to the power distribution board.
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serves as the interconnect between the power distribution board and the fan power boards,
hard drive backplane, and I/O board.
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power supplies 0 and 1.
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controller fan modules. In addition, they contain fan module status LEDs and transfer I2C
data for the fan modules.
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drives, as well as the interconnect for the I/O board, Power and Locator buttons, and
system/component status LEDs. Each drive has an LED indicator for Power/Activity, Fault,
and Locate.

Components

The components of the storage controller are shown in the following figure and identified in the
table.
46 Sun ZFS Storage 7x20 Appliance Customer Service Manual • December 2011 E26399–02
Motherboard - The motherboard is a FRU and includes CPU modules, slots for eight
Power Distribution Board - The power distribution board is a FRU and distributes main
Vertical PDB Card - The vertical power distribution board, or Paddle Card is a FRU and
Power Supply Backplane Card - This board connects the power distribution board to
Fan Power Boards - The two fan power boards are FRUs and carry power to the storage
Drive Backplane - The six-drive backplane is a FRU and includes the connectors for the