Do you have Revision H of our user guide? It's located here:
http://support.logicpd.co...talid=0&EntryId=1392 You'll need to be logged in and make sure you have registered a SOM for the link to work.
Section 6.2.3 covers how to disable the logging.
To disable logging:
Edit /system/etc/gps/config/pathconfigfile.txt
Locate the following entries and change them to the following to disable logging
SESSION_LOG_CONTROL 0
SENSOR_CONTROL 0
Start the navd service. The navd service manages the GPS.h Application Programming Interface (API) to forward GPS commands and handles updates to the GPS application.