Adaptec FC2101CDR2-AC Installation Guide - Page 48
RAID Controller Circuit Boards, with the controller and ethernet boards mounted to
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48 host and device fibre channel input/output processors (IOPs). • I/O: The I/O circuit board provides the interface to the disk drive enclosure (device) and host as well as general support functions. It also contains the switching power supply, which generates +3.3 Vdc and +2.5 Vdc from +5 Vdc, hot-swap circuits, and battery backup unit (BBU) circuits. • Ethernet (optional): The ethernet circuit board provides an ethernet interface to the controller, and connections for debug and out-of-band service to the host and device PCI busses. The RAID Controller requires a minimum of two circuit boards: the controller and I/O. The controller and I/O circuit boards are connected using two 38-pin controlled impedance connectors. The controller, I/O, and ethernet circuit boards are assembled into a stack with the controller and ethernet boards mounted to a controller cover plate and the I/O board mounted to the controller board. When the ethernet circuit board is used, it is mounted to the controller circuit board. Figure 4-1 shows the three circuit boards in their relative positions. Figure 4-1 RAID Controller Circuit Boards 2Gb SANbloc Series RAID Controller Introduction
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