Quote:
Originally Posted by iridius
What is the difference between the main metadata.db and sub-directory metadata.db files?
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There is only one metadata.db file and that is in the root of your calibre library. The other files you see are metadata.opf files.
Quote:
Originally Posted by iridius
If I have a library but have lost teh metadata.db file in the root, will the metadata.db files in the subdirectories for each book do anything?
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Those other metadata files are all opf files and yes these files could be used to rebuild your metadata.db (calibre database) by using the Restore database menu option under Library maintenance (see attached).