7420 Internal Components
The controller components are shown in the following figure and identified in the table.
Figure 54 7420 Controller Components
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7420 Internal Boards - The 7420 controller chassis has the following boards installed. Field-replaceable units (FRUs) should only be replaced by trained Oracle service technicians.
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Motherboard: The motherboard is a FRU and includes CPU modules, slots for eight 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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Power Distribution Board: The power distribution board is a FRU and distributes main 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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Vertical PDB Card: The vertical power distribution board, or Paddle Card 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.
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Power Supply Backplane Card: This board connects the power distribution board to power supplies 0 and 1.
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Fan Power Boards: The two fan power 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.
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Drive Backplane: The six-drive backplane is a FRU and includes the connectors for the 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.
7420 System Drives - The 7420 M2 has two system boot drives in slots 0 and 1, configured as a mirrored pair. Up to four read-optimized cache solid state drives (SSDs) may fill slots 2 through 5, in order. In a 7420 M2 clustered configuration, the number of SSDs installed in each controller can vary.
7420 controllers have two system boot drives in slots 0 and 1, configured as a mirrored pair. Up to four read-optimized cache SSDs, may fill slots 2 through 5, in order. In a 7420 clustered configuration, the number of SSDs installed in both controllers must match.
For information about supported disks and capacities, refer to the Oracle Systems Handbook.
Figure 55 7420 Controller System Drive
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The 7420 controller supports the following configurations:
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Two, four, or eight 8GB DDR3 DIMMs installed on each riser, accommodating 128GB, 256GB, or 512GB of memory for 2.0Ghz CPUs.
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Four or eight 8GB DDR3 DIMMs installed on each riser, accommodating 256GB or 512GB of memory for 2.0GHz and 2.4Ghz CPUs.
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Four or eight 16GB DDR3 DIMMs installed on each riser, accommodating 512GB or 1TB of memory for 2.4Ghz CPUs.
Note - For proper cooling, memory risers corresponding to unpopulated CPU sockets must have fillers installed.
7420 CPU and Memory - Previous 7420 controller configurations support two or four (1.86GHz or 2.00GHz) CPUs, with two memory risers required by each CPU. Four or eight 4GB or 8GB DDR3 DIMMs are installed on each riser, accommodating up to 256GB of memory for two CPUs, or up to 512GB for four CPUs.
Figure 56 7420 Controller Memory Risers
Refer to the service label on the cover for DIMM placement information. On every memory riser, slots D0, D2, D4, and D6 must be populated; optionally, slots D1, D3, D5, and D7 may be populated as a group on all installed memory risers. All DIMMs in the system must be identical.
Figure 57 7420 Controller CPU and Memory
DIMM names in appliance logs and the Maintenance > Hardware view are displayed with the full name, such as /SYS/MB/P0/D7.
7420 Fan Modules - The Fan Modules and Fan Module LEDs of the storage controller are shown in the following figure. The following LEDs are lit when a fan module fault is detected:
Figure 58 7420 Controller Fan Module LEDs
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Front and rear Service Action Required LEDs
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Fan Module Service Action Required (TOP) LED on the front of the controller
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Fan Fault LED on or adjacent to the faulty fan module
The system Overtemp LED might light if a fan fault causes an increase in system operating temperature.