IntelÃ‚Â® Server System Server System "Emerald Ridge ... - CTL

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Intel® Server System "Emerald Ridge” Integrated BaseboardManagement Controller EPSAppendix A: OEM SDR RecordsSystem Information RecordThis system information OEM SDR record provides upper-level software information anddoes not affect firmware operation.Table 83. System Information SDR Record FormatByteNameDescription0:2 OEM ID Intel manufacturers ID – 157h, little endian3 Record Subtype Value 06h (see Table 79)System InformationRecord4 Capabilities Provides capabilities of the system including platform / chassisBits 7:1 – ReservedBit 00b – System has no ID LED1b – System has ID LEDFan Redundancy Map RecordA fan redundancy map record contains information about the fan sensor association andredundancy definition for a fan redundancy sensor. The sensor number of the fanredundancy sensor is provided, as are all the sensor numbers for the associated fans. Therecord includes the number of required fans (N), the total number of fans (N+M) and the fanspeed event states that indicate a fault.Table 84. Fan Redundancy Map SDR Record FormatByteNameDescription0:2 OEM ID Intel manufacturers ID – 157h, little endian.3 Record Subtype Value 05h. See Table 79.Fan Redundancy Map Record4 Fan Redundancy SensorNumber5 Flags7:1 – Reserved0 – Persistently storedevent stateSensor number of the fan redundancy sensor that this recordconfigures.If bit 0 of the flags is set to a 1, the associated fan redundancy sensorstores its event assertion state persistently.6:7 Failed Event State Mask This mask defines the fan speed sensor event offsets that indicate thatthe associated fan has failed.8 Redundant Fan Count The number of fans (M) that can fail and the fan set still providesufficient cooling. The total number of fans in the set (N+M) isdetermined by the number of fan sub-records below and which ofthose fans are enabled.9:10Fan Speed Sensor #Fan Presence Sensor #This sub-record defines the sensors associated with one fan. If the fanis not a hot swap fan, the fan presence sensor field is set to 0. One ofthese sub-records should exist for each fan in the fan redundancy set.11:N Other fan sub-records One pair of sub-records for each fan in the set.Revision 1.0Intel ® Confidential 163
Appendix A: OEM SDR RecordsIntel® Server System "Emerald Ridge” Integrated BaseboardManagement Controller EPSVoltage Sensor Scaling SDR RecordThe scaling factor is to be used by the IBMC FW to convert 10-bit A/D converter values to avalue that fits inside the range of the normalized values in the 8-bit SDR table. The SDRtable needs to use 8-bit values to be compatible with IPMI specifications. The conversionworks by having FW multiply the 10-bit A/D reading by this value and then divide the resultby 10000. This would use 32-bit integer math supported by the ARM946ES core in the IBMC.Table 85. Voltage Sensor Scaling SDR FormatByteNameDescription0:2 OEM ID Intel manufacturers ID – 157h, little endian3 Record Subtype Value 09h. See Table 79.Voltage SensorScaling Record4 Number of scalingentries5:78:NVoltage sensor numberScale factor LSBScale factor MSBRemaining voltagesensor scaling groupsContains the number of scaling pair entries that followContains the hex byte for the voltage sensor numberScale factor least significant byteScale factor most significant byteContains the remaining three byte groupings for the voltage sensorscaling dataFan Sensor Scaling SDR RecordThis OEM record sub-type controls how the BMC reads and presents fan tachometer data toexternal interfaces.Table 86. Fan Sensor Scaling SDR FormatByteNameDescription0:2 OEM ID Intel manufacturers ID – 157h, little endian3 Record Subtype Value 0Ah. See Table 79.Fan Sensor Scaling Record4 Tachometer ReadingFormatBit field: Bit 0 = Fan 0 -> Bit 7 = Fan 70 = RPM, 1 = Raw Time Between Pulses5 Pulses Per Revolution Bit field: Bit 0 = Fan 0 -> Bit 7 = Fan 76:7 Fan 0 Max RPM 0000:FFFF8:9 Fan 1 Max RPM 0000:FFFF10:11 Fan 2 Max RPM 0000:FFFF12:13 Fan 3 Max RPM 0000:FFFF14:15 Fan 4 Max RPM 0000:FFFF16:17 Fan 5 Max RPM 0000:FFFF18:19 Fan 6 Max RPM 0000:FFFF20:21 Fan 7 Max RPM 0000:FFFF0 = 2 Pulses Per Revolution, 1 = 1Pulse Per Revolution164Intel ConfidentialRevision 1.1
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