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I update my 0.6.6 cacti version to the new one(0.6.7). In the update guide show me that i must copy the old rra archive to the new directory. I did the actions but when i go to the data source menu, i don't see anything of my old data sources. I don't know if i missed something, but if someone did this upgrade, please teach me how i upgrade my data sources.
It sounds like you may have re-imported your database from the 'cacti.sql' script. When you upgrade, cacti will take care of updating your database. The 'cacti.sql' file is only for new installs. If you follow this method, your data sources will surely remain.