take a database backup of production and restore it to Dev server.
bdw, why are you not able to export-import def files?
You can use BMC Remedy Migrator for the synchronization of the two different servers. Please go through the BMC Remedy Migrator Guide to have a better idea.
Try Migrator which will move the Code along with the data to different Server but it works slow.So DB backup would be the best option.