Hi,
thanks for your suggestions. I already use a hidden directory for koreader (and Coolreader) so the problem shouldn't come from some access collision... And Ken, I actually used your thread to originally set up the reader, so thanks a lot for that, it really helped.
I think that when adding large numbers of books to the reader at some point the database gets corrupted. I don't think that it is calibre's handling of the database, because in those few cases I checked the database integrity directly after side-loading the books (without first unplugging) the database was ok. So it most probably happens in the firmware at some point. And either calibre inserts values that lead to that (I don't believe that) or the firmware is buggy in that area. If I knew it is the second and that the maximum number of books that can be side-loaded in one batch is e.g., 100, then I would be happier and would know how to use it.
Cheers, Joachim
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