The Vaio Fan Daemon (vfand) will control the fan speed of your Vaio laptop to avoid overheating: at full speed when temperature is above a configurable value, and linearly otherwise (higher temperatures will run the fan at higher speeds). If the temperature is below a configurable value, the fan is turned off to make the computer as silent as possible.
These details are provided for information only. No information here is legal advice and should not be used as such.
At one point, Open Hub analyzed source code for this project based on code location(s) available at that time. Since then, the code locations have been removed.