HP Integrity Superdome SX2000 User Guide, Sixth Edition - HP Integrity Superdo - Page 21
Utilities Subsystem, UGUY, SBCH, HUCB, HUCB-HalfDome Utility Connector Board
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Overview Utilities Subsystem Utilities Subsystem Both types of servers contain a group of boards that together form the Utilities subsystem. These include: • UGUY • SBCH-Single Board Computer Hub • SBC-Single Board Computer • HUCB-HalfDome Utility Connector Board UGUY The UGUY board is a major component of the utility subsystem. It provides the following functions: • System clocks • Cabinet power monitor • Cabinet utility circuits providing scan, reset, and LED driver functions • Cabinet ID number switch Every cabinet contains one UGUY. The UGUY plugs into the HUCB. It is not hot swappable. Its MP microprocessor controls power monitor functions, executing the power monitor 3 (PM3) firmware and the cabinet-level utility (CLU) firmware. SBCH The SBCH, along with the SBC, forms part of the MP function. It provides the physical and electrical interface to the SBC, the fanning out of the Universal Serial Bus (USB) to internal and external subsystems, and a LAN 10/100BT Ethernet connection. It plugs into the HUCB and is hot swappable. Every CPU cabinet contains one SBCH board, but only one SBCH contains an SBC board used as the MP for the complex. The remaining SBCH boards act as USB hubs. SBC The SBC board is an embedded PC running System Utility Board (SUB) firmware. It is the core of the Management Processor and plugs into the SBCH board through a PC104 interface.The SBC provides three external interfaces to the Utility Subsystem: • LAN (10/100BT Ethernet) for customer console access • RS232 port for remote access from the response center through a modem • RS232 port for local console access for manufacturing and field support personnel The modem function is not included on the SBC and must be external to the cabinet. HUCB The HUCB is the backplane of the Utility Subsystem. It provides cable distribution for all the utility signals except the clocks. It also provides the customer LAN interface and serial ports. The SMS connects to the HUCB. The system "type" switch is located on the HUCB. There are no active circuits on this board. It is not hot swappable. Chapter 1 9