Current fan speed displayed doesn't match actual

[spoulson]

Suggested fan speed: 6%
...
FanSensor: name=Fan1, id=0x30, rpm=1800, max=23640, percent=7.6%
FanSensor: name=Fan2, id=0x31, rpm=1800, max=23640, percent=7.6%
FanSensor: name=Fan3, id=0x32, rpm=1800, max=23640, percent=7.6%
FanSensor: name=Fan4, id=0x33, rpm=1680, max=23640, percent=7.1%
FanSensor: name=Fan5, id=0x34, rpm=1800, max=23640, percent=7.6%
FanSensor: name=Fan6, id=0x35, rpm=1800, max=23640, percent=7.6%

Additionally, the iDRAC web management shows fan speed percentage matches "suggested", not FanSensor.

Root Cause:
Dell does not expose the actual percentage in ipmitool sdr get command. So, the percent values on FanSensor lines are computed from the rpm and max values. The method or algorithm for Dell's fan percentage is not yet known.