How to get sensor threshold on BMC-based system with a specific sensor number

Applicable model list
All products with BMC functional
Description
This guide should also be helpful for user with sensor threshold problems to learn
how to get sensor threshold using IPMI.

Step

1. Get sensor number

# ipmitool sdr elist
BMC_HEALTH     | 01h | ok | 6.0 |
VERSION_CHANGE | 02h | ok | 6.0 |
BMC_WATCHDOG   | 03h | ok | 6.0 |
SYSTEM_RESET   | 04h | ok | 6.0 | Initiated by power up
FW_PROGRESS    | 05h | ok | 6.0 |
INTEGRITY      | 06h | ok | 6.0 |
PSU1           | 07h | ok | 10.0 | Presence detected
PSU2           | 08h | ok | 10.0 | Presence detected
PSU-WATT       | 09h | ok | 19.0 | 150 Watts
PAY_12-VOL     | 0Ah | ok | 20.0 | 12.09 Volts
PAY_5_0-VOL    | 0Bh | ok | 20.0 | 5.05 Volts
PAY_5_0_SB-VOL | 0Ch | ok | 20.0 | 5.02 Volts
LOM_5_0-VOL    | 0Dh | ok | 6.0 | 5.08 Volts
PAY_3_3-VOL    | 0Eh | ok | 20.0 | 3.37 Volts
PAY_3_3_SB-VOL | 0Fh | ok | 7.0 | 3.33 Volts
LOM_3_3-VOL    | 10h | ok | 6.0 | 3.40 Volts
BAT_3_0-VOL    | 11h | ok | 20.0 | 3.13 Volts
LOM_1_5-VOL    | 12h | ok | 6.0 | 1.56 Volts
LOM_1_26-VOL   | 13h | ok | 6.0 | 1.26 Volts
PCH_1_05-VOL   | 14h | ok | 20.0 | 1.05 Volts
CPU_VCORE-VOL  | 15h | ok | 20.0 | 1.79 Volts
SYS0-TMP | 16h | ok | 23.0 | 29 degrees C
SYS1-TMP | 17h | ok | 23.0 | 26 degrees C
SYS2-TMP | 18h | ok | 23.0 | 36 degrees C
CPU-TMP | 19h  | ok | 3.0 | 39 degrees C
FAN1-RPM | 1Ah | ok | 23.0 | 6900 RPM
FAN2-RPM | 1Bh | ok | 23.0 | 6900 RPM
FAN3-RPM | 1Ch | ok | 23.0 | 7000 RPM
FAN4-RPM | 1Dh | ok | 23.0 | 6500 RPM

2. Sensor threshold value check

# ipmitool raw 0x04 0x27 [sensor number]

Ex: sensor number = 0x19 => CPU-TMP

[root@fwa-3260-efi ~]# ipmitool raw 0x04 0x27 0x19
18 00 00 00 5a 69 00

response : 18 00 00 00 5a 69 00  

Note: Byte1( Completion Code) does not show because the command success. Then, ignore Byte1.

Therefore, response value "18" represents Byte2 and "18" means 0001 1000 in Binary. That means "upper critical threshold" and " upper non-critical threshold" are set.

The response value "5a" and "69" correspond to Byte6 and  Byte7 respectively. The value "5a" of Byte6(upper non-critical threshold) is equal to 90 in decimal, which means the upper non-critical threshold of CPU-TMP is 90 degrees C. The value "69" of Byte7(upper critical threshold) is equal to 105 in decimal, which means the upper critical threshold of CPU-TMP is 105 degrees C.