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System Overview 1-21
System Board Management Controller (BMC)
Server management is concentrated in the System Board Management Controller
(BMC). The BMC and associated circuitry are powered from a 5Vdc standby voltage,
which remains active when system power is switched off, but the ac power source is
still on and connected.
The BMC supports the Management Workstation Application (MWA), which allows
remote server management via a modem, LAN, or direct connection to a manager
system. Events monitored by the manager system include over-temperature and over-
voltage conditions, fan failure, or chassis intrusion.
Information on the Management Workstation Application (MWA) in the ESMPRO
Suite User’s Guide on the ESMPRO Suite 1.9 CD-ROM.
One major function of the BMC is to autonomously monitor system management
events, and log their occurrence in the nonvolatile System Event Log (SEL). The events
being monitored include overtemperature and overvoltage conditions, fan failure, or
chassis intrusion. To enable accurate monitoring, the BMC maintains the nonvolatile
Sensor Data Record (SDR), from which sensor information can be retrieved. The BMC
provides an ISA host interface to SDR sensor information, so that software running on
the server can poll and retrieve the server's current status.
The BMC performs the following:
!
Monitors server board temperature and voltage
!
Monitors processor presence and controls Fault Resilient Boot (FRB)
!
Detects and indicates baseboard fan failure
!
Manages the SEL interface
!
Manages the SDR Repository interface
!
Monitors the SDR/SEL timestamp clock
!
Monitors the system management watchdog timer
!
Monitors the periodic SMI timer
!
Monitors the event receiver
!
Controls secure mode, including video blanking, diskette write-protect monitoring,
and front panel lock/unlock initiation
!
Controls Wake On LAN via Magic Packet support.
External Device Connectors
The external I/O connectors provide support for a PS/2 compatible mouse and a
keyboard, for a SVGA monitor, 2 serial port connectors, a parallel port connector, LAN
port, two USB ports, and one external-SCSI connector.
Summary of Contents for Express5800/140Hb
Page 1: ... S e r v i c e G u i d e EXPRESS5800 140Hb ...
Page 2: ......
Page 3: ... S e r v i c e G u i d e EXPRESS5800 140Hb ...
Page 10: ...viii Contents ...
Page 18: ...xvi Using This Guide ...
Page 48: ...1 30 System Overview ...
Page 64: ...2 16 Setting Up the System Figure 2 10 Connecting the AC Power Cord to the Server ...
Page 98: ...3 28 Configuring Your System ...
Page 101: ......
Page 176: ...4 76 Disassembly and Reassembly ...
Page 200: ...5 24 Problem Solving ...
Page 201: ...6 Illustrated Parts Breakdown Exploded View Field Replaceable Units ...
Page 211: ...A Technical Specifications Server Unit ...
Page 214: ...A 4 Technical Specifications ...
Page 220: ...B 6 Interrupt Request PCI IRQ Device I O Port Address Assignments ...
Page 231: ...D ROMPilot BIOS Error Codes ROMPilot BIOS Error Codes ...
Page 234: ...D 4 ROMPilot BIOS Error Codes ...
Page 235: ...E Connectors Overview External Device Connector Pin Information ...
Page 250: ...10 Glossary ...
Page 256: ...Index 4 ...
Page 257: ...xx ...
Page 258: ... 456 01547 000 ...