Kontron S4600 SEL Troubleshooting - Manual (Page 82)

Memory Subsystem
System Event Log Troubleshooting Guide for EPSD Platforms Based on Intel ® Xeon ® Processor E5 4600/2600/2400/1600/1400 Product Families
72 Intel order number G90620-002 Revision 1.1
7.2 Memory RAS Mode Select
Memory RAS Mode Select events are logged to record changes in RAS Mode.
When a RAS Mode selection is made that changes the RAS Mode (including selecting a RAS Mode from or to Independent Channel
Mode), that change is logged to SEL in a Memory RAS Mode Select event message, which records the previous RAS Mode (from)
and the newly selected RAS Mode (to). The event also includes an Offset value in ED1 which indicates whether the mode change
left the system with a RAS Mode active (Enabled), or not (Disabled
– Independent Channel Mode selected).This sensor provides the
Spare Channel mode RAS Configuration status. Memory RAS Mode Select is an informational event.
Table 60: Memory RAS Mode Select Sensor Typical Characteristics
Byte Field Description
8
9
Generator ID 0001h = BIOS POST
11 Sensor Type 0ch = Memory
12 Sensor Number 12h
13 Event Direction and
Event Type [7] Event direction
0b = Assertion Event
1b = Deassertion Event
[6:0] Event Type = 09h (digital Discrete)
14 Event Data 1 [7:6] – 10b = OEM code in Event Data 2
[5:4] – 10b = OEM code in Event Data 3
[3:0] – Event Trigger Offset
0h = RAS Configuration Disabled
1h = RAS Configuration Enabled
15 Event Data 2 Prior RAS Mode
[7:4] = Reserved
[3:0] = RAS Mode
0h = None (Independent Channel Mode)
1h = Mirroring Mode
2h = Lockstep Mode
4h = Rank Sparing Mode