Server Board Family Datasheet

System Management Intel® S5000 Server Board Family Datasheet
Revision 1.3
Intel order number D38960-006
136
4.17.5.1 DIMM Sparing
With DIMM sparing, the BMC will implement two sensors per DIMM sparing domain (the set of
DIMMs which share a spare set of DIMMs). Each sparing domain will have an associated
unique Entity ID. Both sensors will belong to that Entity.
 DIMM sparing redundancy sensor
Sparing 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 sparing
domain appropriately.
This sensor is of type Availability Status (0Bh) and indicates whether the domain is
redundant or not (i.e., whether there are spare DIMM(s) available for use). The
supported offsets are:
- 00h – Fully redundant
Both operational and enabled DIMMs and spares in domain
- 01h – Redundancy lost: Sufficient resources, from redundant
Operational and enabled DIMMs in domain and no spares
- 05h – Non-redundant: Insufficient resources
No operational or disabled DIMMs in domain
 DIMM sparing enabled
DIMM sparing 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 sparing domain
appropriately.
This sensor is used to communicate the enabled state of the sparing feature for the
associated domain. The sensor is of type Entity Presence (25h). This state of this sensor
indicates whether the DIMM Sparing Redundancy sensor should be ignored. The
supported offset is:
- 00h – Entity present
If asserted, indicates that the DIMM sparing feature for this domain is enabled and
the associated DIMM Sparing Redundancy Sensor state is valid. If not asserted,
then the DIMM Sparing Redundancy Sensor should be ignored.
- 01h – Entity absent
If asserted, indicates that the DIMM sparing feature for this domain is not available
and the associated DIMM Sparing Redundancy Sensor state is invalid. This offset is
mutually exclusive with offset 00h - Entity Present.
Note: See the server or workstation Technical Product Specification that applies to your product
for more detailed information
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.