Intel 5000 Series

System Management Intel® 5000 Series Chipsets Server Board Family Datasheet
Revision 1.1
Intel order number D38960-004
126
4.17.5.2 Memory Mirroring
If a specific platform supports memory mirroring, the BMC will implement two sensors per
memory mirroring domain (the DIMMs that form a mirrored set). Each mirroring domain will have
an associated unique entity ID. Both sensors will belong to that entity.
 Memory mirroring redundancy sensor
Memory mirroring redundancy is determined by the BIOS. The BIOS conveys this state
to the BMC. The BMC then sets the state of the associated sensor for the specific
mirroring domain appropriately.
This sensor is of type Availability Status (0Bh) and indicates whether the domain is
redundant or not (i.e., whether all mirrored DIMM(s) are available for use). The
supported offsets are:
- 00h – Fully redundant
All DIMMs in mirrored domain operational and enabled.
- 01h – Redundancy lost : Sufficient resources
One or more failed DIMMs in one of the mirror pairs
- 05h – Non-redundant : Insufficient resources
Non-operational DIMMs in both of the mirror pairs
 Memory mirroring enabled
Memory mirroring is enabled by the BIOS and this configuration is set in the BMC. The
BMC then sets the state of the associated sensor for the specific mirroring domain
appropriately.
This sensor is used to communicate the enabled state of the mirroring feature for the
associated domain. The sensor is of type Entity Presence (25h). This state of this sensor
indicates whether the Memory Mirroring Redundancy sensor should be ignored. The
supported offset is:
- 00h – Entity present
If asserted, indicates that the memory mirroring feature for this domain is enabled
and the associated memory mirroring redundancy sensor state is valid. If not
asserted, then the memory mirroring redundancy sensor should be ignored.
- 01h – Entity absent
If asserted, indicates that the memory mirroring feature for this domain is not
available and the associated memory mirroring redundancy sensor state is invalid.
This offset is mutually exclusive with offset 00h – Entity present.
Note: Memory sparing and mirroring features are currently disabled and will be made available
after production launch.
Note: See the server or workstation Technical Product Specification that applies to your product
for more detailed information