Check manual page of ibm_imm_fan
Fan rpm via IBM Integrated Management Module (IMM)
This check monitors the percentage of maximum RPM of fans via the IBM
Integrated Management Module (IMM). It uses snmp and the IBM IMM MIB to
gather the fan data.
The lower default levels are set to 28%/25%.
Upper and lower levels are configurable.
The name of the fan as extracted from the OID fanDescr
The service discovery will find one service per fan