I back-up a 23 GB library to two external hard drives about once a week. I always wipe out the previous back up set and copy and paste fresh each time and let it run.
Ive also been thinking of adding an online backup (carbonite etc) as another failsafe.
How do automatic back-ups work in the realm of parametrically linked files such as Inventor. Im a little worried about that concept.
I find it strange you ask about backups for the library files over the Inventor files themselves.
Inventor in general is not an issue as long as the project files workspace is correct. That mean all the files are under the workspace folder or where the project file is stored. In a directory structure that would mean that the project file/workspace is at the top and all Inventor files and folder are under that directory. That applies to Ivnentor files not the library files as explained below.
The library files are the only files are the only files in the Inventor realm that have a hard coded path in them. Meaning that they need to be restored to the same folder structure they were generated to when placed in an assembly. The worst case scenario would be that you would need to resolve the link once and save the file that would replace the pathing. But that only applies when the files of folders are move.
I may have used the term "library" incorrectly.
I have ONE "project" in which my entire collection of inventor files is located. I am trying to back up my inventor files.
So im just curious how a continuous automatic on-line back-up system will work for inventor.
As mercerc said, as long as files are restored to the same location they were backed up from, there should be no issues at all.