2 weeks ago
We have a running X690-G2.
The power consumption on one unit is high, and on the other is very low.
Can we do anything here to balance it?
Tuesday
The partner switch is more balanced
denue6sw009.1 # show power
PowerSupply 1 information:
State : Powered On
PartInfo : Internal PSU-1 1736B-40144 800748-00-02
Revision : 02
Input : 227.25 V AC
Output 1 : 12.03 V, 4.00 A (12V/770W Max)
Power Usage : 70.25 W
Airflow Direction : Back to Front
PowerSupply 2 information:
State : Powered On
PartInfo : Internal PSU-2 1736B-40368 800748-00-02
Revision : 02
Input : 226.00 V AC
Output 1 : 12.04 V, 2.12 A (12V/770W Max)
Power Usage : 44.87 W
Airflow Direction : Back to Front
System Power Usage : 115.12 W
Poll Interval : 60 s
Change Threshold : N/A
Change Action : N/A
Tuesday
There is no CLI command to "balance" the power or move from PSU 2 to PSU 1?
Only option to "balance" is pull the power cable? And hope when power is back that it get balanced.
yesterday
No, you cannot fix this with a command, and pulling the plug may or may not balance the PSUs. I believe the hardware isn't really built to produce a nice balance but will feed whatever the electrical bus requires. This means (if true) that the PSU with a slightly higer voltage output will feed more power to the system. Assume one PSU is calibrated to 12.00 V and one to 12.05 V, the one with the higher voltage will, due to physics, deliver more current. Also, mind you that these readings are certainly not correct, likely not even to the first decimal! We have an ongoing discussion with TAC about this pertaining to other platforms where the readings and real power differs wildly. The readings should be considered to be "guesstimates" rather than a true, calibrated value.
It's like with thermometers. You have one and know exactly the current temperature, with one decimal precision! You get another and all of a sudden, you realize that the first thermometer may be off by 1-2 degrees, because the new one doesn't match at all!
Tuesday
denue6sw010.1 # show power
PowerSupply 1 information:
State : Powered On
PartInfo : Internal PSU-1 1828B-40813 800748-00-02
Revision : 02
Input : 226.00 V AC
Output 1 : 11.92 V, 0.39 A (12V/770W Max)
Power Usage : 37.31 W
Airflow Direction : Back to Front
PowerSupply 2 information:
State : Powered On
PartInfo : Internal PSU-2 1736B-40146 800748-00-02
Revision : 02
Input : 227.25 V AC
Output 1 : 12.03 V, 6.31 A (12V/770W Max)
Power Usage : 91.12 W
Airflow Direction : Back to Front
System Power Usage : 128.43 W
Poll Interval : 60 s
Change Threshold : N/A
Change Action : N/A
denue6sw010.2 #