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6.1 BMC configuration options
The Baseboard Management Controller (BMC) in the x3850 M2 and x3950 M2
systems is a service processor based on the Hitachi 2166 chip that complies with
the Intelligent Platform Management Interface, version 2.0 (IPMI v2.0)
specification. The Intel specification document is available at:
http://www.intel.com/design/servers/ipmi/ipmiv2_0_rev1_0_markup_2.pdf
The BMC stores information related to up to 512 events. After 512 events have
been stored, the log must be cleared before further events are recorded. A
first-in-first-out algorithm is not used here. The time it takes to fill the BMC log
area depends of the kind of events that have occurred.
Tip: We recommend you save the BMC log before clearing it, in case the
service history is required. The logged events in the BMC can be transferred
in-band to the Remote Supervisor Adapter II (RSA II) or to the operating
system through a driver.
The BMC communicates with the RSA II through the Intelligent Platform
Management Bus (IPMB) and controls the components about a whole set of
standardized and system-specific sensors. The components communicate with
the BMC through an embedded Inter-Integrated Circuit (I²C) bus interface.
Logged events that are defined as errors are reported, as follows:
Into the RSA II event data store
Through the BMC driver interface into the operation system and management
applications
Through error indicator LEDs on different components in the server
By illuminating of the respectively error LED on the Light Path Diagnostic
(LPD) panel, which you can pull out at the front of the x3850 M2 and
x3950 M2 servers
By IPMI messaging over LAN
The BMC protects the server and powers the server off or prevents DC power-on
in any of the following circumstances:
At temperature of out-of-specification
Invalid or wrong component installation
Power voltage faults
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Planning, Installing, and Managing the IBM System x3950 M2
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