Technical Product Specification

Intel
®
Server Board S2600WP TPS Platform Management Functional Overview
4.7
System Event Log (SEL)
The BMC implements the system event log as specified in the Intelligent Platform Management
Interface Specification, Version 2.0. The SEL is accessible regardless of the system power state
through the BMC's in-band and out-of-band interfaces.
The BMC allocates 65,502 bytes (approximately 64KB) of non-volatile storage space to store
system events. The SEL timestamps may not be in order. Up to 3,639 SEL records can be
stored at a time. Any command that results in an overflow of the SEL beyond the allocated
space is rejected with an “Out of Space” IPMI completion code (C4h).
4.7.1
Servicing Events
Events can be received while the SEL is being cleared. The BMC implements an event
message queue to avoid the loss of messages. Up to three messages can be queued before
messages are overwritten.
The BMC recognizes duplicate event messages by comparing sequence numbers and the
message source. For details, see the Intelligent Platform Management Interface Specification
Second Generation v2.0. Duplicate event messages are discarded (filtered) by the BMC after
they are read from the event message queue. The queue can contain duplicate messages.
4.7.2
SEL Entry Deletion
The BMC does not support individual SEL entry deletion. The SEL may only be cleared as
a whole.
4.7.3
SEL Erasure
SEL erasure is a background process. After initiating erasure with the Clear SEL command,
additional Clear SEL commands must be executed to get the erasure status and determine
when the SEL erasure is completed. This may take several seconds. SEL events that arrive
during the erasure process are queued until the erasure is complete and then committed to
the SEL.
SEL erasure generates an Event Logging Disabled (Log Area Reset/Cleared offset)
sensor event.
4.7.4
SEL Extension Capabilities
The BMC provides an OEM extension to all SEL entries. Each entry includes an additional eight
bytes for storing extra event data that will not fit into the original three data bytes provided by
standard IPMI SEL entries. The first extension byte is always valid for all SEL entries and
specifies the severity of the SEL event as well as the number of valid extension bytes following
the first one. That leaves up to seven SEL extension data bytes that can be defined for each
SEL event entry.
All standard IPMI SEL commands work the same as if there were no SEL extensions.
In order to store and access the extended SEL information, five OEM commands are
implemented that closely follow the standard IPMI SEL commands, but provide support for the
SEL Extension data. These OEM commands are specified in the Intel
®
General Application
Commands table.
Revision 1.6 Intel order number G44057-007 51