[eschwartz]

Originally Posted by robin58

@eschwartz,

I think you're missing my point. If I have backups and the only difference is the version number inside as detailed above, then surely that wouldn't prevent a restoration? Would it?

You should be fine, just so long as you can predict with 100% accuracy that you will never ever EVER update the metadata in your library, nor will you ever add more books, because if so, you will find out the metadata change wasn't backed up, and the new books don't even have the out-of-date OPF your current books have.

And your restore will fail to take this into account, which is somewhat contrary to the purpose of having a backup, if you ask me. You will of course have the actual ebook files, but I doubt you'd enjoy redoing all your metadata.

This assumes that something catastrophic happens to your db, but that's no less likely than something catastrophic happening to your hard drive.

Since the OPF is quite small, and your sync program can probably handle uploading only the changes, why not just let it sync too?

Other than the same 2 lines as above, there is a reference to the cover.jpg file in which for some reason has

now instead of

It just happened to write it in a different order the next time it updated the metadata. I don't know why, as I am not familiar with the rules behind calibre's metadata backup process, but it's no bigger deal than changing the version number on the calibre-as-a-contributor entry.