Supermicro SEL Reference

IPMI System Event Log reference for Supermicro servers.

Platforms: Various (AS-, SYS-, PIO- series)

BMC: IPMI 2.0 / Redfish

Overview

Supermicro servers use a standard IPMI 2.0-compliant BMC with additional Supermicro-specific features. Management is available via IPMItool, IPMIView GUI, or Redfish API.

Supported Models

Model	Form Factor	CPU	Use Case
AS-1014S-WTRT	1U	AMD EPYC	Compute
AS-A126GS-TNBR	4U	AMD	GPU Server
SYS-A22GA-NBRT	4U	AMD	GPU Server
PIO-629BT-06408S-01-RI13	2U	Intel	Twin Server
SYS-2029TP-HC1R-G2-FS011	2U	Intel	TwinPro
GENOA2D24G-2L+	Custom	AMD EPYC Genoa	GPU Server
Super Server (Generic)	Various	Various	Generic models

Model Naming Convention

Prefix	Meaning
AS-	AMD EPYC platform
SYS-	Standard system
PIO-	Pioneer OEM series
GPU-	GPU-optimized

Suffix	Meaning
-WTRT	WIO (Wide I/O), Tower, Redundant PSU
-TNBR	Twin, NVMe, Redundant
-HC1R	Hot-swap, Compact, 1U, Redundant

BMC Versions

Version	Features
1.00 - 1.74	Standard IPMI
3.10+	Enhanced Redfish
6.74+	Latest with GPU support

Temperature Sensors

Supermicro uses abbreviated sensor names:

Sensor	Location	Warning	Critical
CPU1 Temp	Processor 1	85°C	95°C
CPU2 Temp	Processor 2	85°C	95°C
System Temp	Mainboard ambient	75°C	80°C
Peripheral Temp	PCIe area	80°C	85°C
MB Temp	Motherboard	80°C	85°C
DIMM Temp	Memory	75°C	85°C
VRM Temp	Voltage regulators	95°C	105°C
TR1/TR2	Thermal regions	Varies	Varies
AOC Temp	Add-on card	80°C	90°C

Fan Sensors

Sensor Pattern	Description
FAN1 - FAN8	Chassis fans
FANA - FANF	Additional fans (hex naming)
PSU Fan	Power supply fans

Fan Event Types

Event	Severity	Description
Lower Non-critical	🟡 Warning	Fan slowing
Lower Critical	🔴 Critical	Fan very slow
Lower Non-Recoverable	🔴 Critical	Fan stopped

Power Supply Events

PSU Sensors

Sensor	Description
PS1 Status	Power supply 1
PS2 Status	Power supply 2
PSU1/PSU2	Alternative naming
PWR Status	Overall power status

PSU Event Types

Event	Severity	Description
Presence detected	🟢 Info	PSU installed
Failure detected	🔴 Critical	PSU failed
Power Supply AC lost	🔴 Critical	AC power lost
Predictive failure	🟡 Warning	PSU degrading
Configuration Error	🟡 Warning	PSU mismatch

Memory Events

DIMM Naming

Supermicro uses positional DIMM naming:

CPU	Channels	Slots
CPU1	P1-DIMMA - P1-DIMMH	1-2 per channel
CPU2	P2-DIMMA - P2-DIMMH	1-2 per channel

Memory Event Types

Event	Severity	Description
Correctable ECC	🔵 Info	Single-bit error
Uncorrectable ECC	🔴 Critical	Multi-bit error
Presence Detected	🟢 Info	DIMM found
Configuration Error	🟡 Warning	DIMM config issue

OEM Records (c0, c1)

Supermicro uses OEM record types for vendor-specific events:

OEM Record c0

OEM record c0 | info | 002b99 | 6a1dc0040100

Field	Meaning
002b99	Event identifier
6a1dc0040100	OEM-specific data

Common c0 Events:

System configuration changes
BIOS updates
Hardware detection events

OEM Record c1

OEM record c1 | info | 000000 | 0698c0a80202

Common c1 Events:

Network configuration
IP address changes (visible in hex data)

Decoding OEM Data

The hex data often contains IP addresses:

0698c0a80202 = ... 192.168.2.2 (c0.a8.02.02)
0698c0a80208 = ... 192.168.2.8 (c0.a8.02.08)

Voltage Sensors

Sensor	Normal Range
12V	11.4V - 12.6V
5VCC	4.75V - 5.25V
3.3VCC	3.135V - 3.465V
VBAT	2.7V - 3.3V
Vcpu1/Vcpu2	Per CPU spec
VDIMM	1.1V - 1.3V (DDR5)
5VSB	4.75V - 5.25V
3.3VSB	3.135V - 3.465V

Drive Sensors

Hot-Swap Bay Sensors

Sensor Pattern	Description
HDD Status	Drive presence
Slot N Status	Individual slot status
Backplane N	Backplane health

Drive Events

Event	Severity	Description
Drive Present	🟢 Info	Drive installed
Drive Absent	🟢 Info	Drive removed
Drive Fault	🔴 Critical	Drive failure
Rebuild	🟢 Info	RAID rebuilding

Processor Events

Event	Severity	Description
Presence detected	🟢 Info	CPU found
IERR	🔴 Critical	Internal error
Thermal Trip	🔴 Critical	CPU overheated
FRB1/BIST Failure	🔴 Critical	CPU self-test failed
Configuration Error	🟡 Warning	CPU mismatch
Throttled	🟡 Warning	Power/thermal throttling

GPU Support (AS-A126GS, SYS-A22GA)

GPU-optimized Supermicro servers include:

Sensor	Description
GPU1-8 Temp	GPU temperatures
GPU Power	GPU power draw
AOC Slot N	GPU slot status

BMC Web Interface

Access

URL: https://<bmc_ip>/
Default User: ADMIN
Default Pass: ADMIN (change immediately!)

Key Features

Feature	Description
iKVM	HTML5 remote console
Virtual Media	ISO/floppy mount
Power Control	Power on/off/cycle
SEL Log	Event log viewer
Sensor Readings	Real-time sensors
Remote FRU	Hardware inventory

IPMItool Commands

# Get sensor readings
ipmitool -I lanplus -H <bmc_ip> -U ADMIN -P ADMIN sdr list full

# Get SEL entries
ipmitool -I lanplus -H <bmc_ip> -U ADMIN -P ADMIN sel list

# Clear SEL (when full)
ipmitool -I lanplus -H <bmc_ip> -U ADMIN -P ADMIN sel clear

# Get FRU info
ipmitool -I lanplus -H <bmc_ip> -U ADMIN -P ADMIN fru print

# Power status
ipmitool -I lanplus -H <bmc_ip> -U ADMIN -P ADMIN power status

# Power cycle
ipmitool -I lanplus -H <bmc_ip> -U ADMIN -P ADMIN power cycle

# BMC cold reset
ipmitool -I lanplus -H <bmc_ip> -U ADMIN -P ADMIN mc reset cold

# Get BMC info
ipmitool -I lanplus -H <bmc_ip> -U ADMIN -P ADMIN mc info

IPMIView GUI

Supermicro provides IPMIView for graphical management:

Download from Supermicro website
Java-based application
Supports multiple server management
Includes KVM, virtual media, sensor monitoring

Redfish API

# Get system info
curl -k -u ADMIN:ADMIN https://<bmc_ip>/redfish/v1/Systems/1

# Get thermal
curl -k -u ADMIN:ADMIN https://<bmc_ip>/redfish/v1/Chassis/1/Thermal

# Get power
curl -k -u ADMIN:ADMIN https://<bmc_ip>/redfish/v1/Chassis/1/Power

# Get event log
curl -k -u ADMIN:ADMIN https://<bmc_ip>/redfish/v1/Managers/1/LogServices/IPMI/Entries

Supermicro Update Manager (SUM)

SUM provides command-line firmware management:

# Get BMC firmware version
sum -i <bmc_ip> -u ADMIN -p ADMIN -c GetBmcInfo

# Update BMC firmware
sum -i <bmc_ip> -u ADMIN -p ADMIN -c UpdateBmc --file bmc_firmware.bin

# Get BIOS version
sum -i <bmc_ip> -u ADMIN -p ADMIN -c GetBiosInfo

Troubleshooting

BMC Not Responding

Check network connectivity
Verify BMC IP via BIOS (F2) → IPMI Config
Try physical BMC reset (jumper or command)
Check for IP conflicts

Fan Warnings

Check for dust/obstructions
Verify fan properly seated
Check fan cable connection
Replace fan module

High Temperatures

Verify datacenter cooling
Check all fans operational
Inspect for dust buildup
Review system load

OEM Record Interpretation

If seeing unknown OEM records:

Note the record type (c0, c1, etc.)
Check Supermicro documentation
Contact Supermicro support with event data

Last updated: December 2025