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Originally Posted by PeterT
The database is not rewritten on reboot. If the corruption is too bad (no idea how bad it had to be) it is deleted and a new one is created with your being forced to do a reset up of the device.
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In other words, if you don't delete the corrupt database, eventually the kobo will delete it for you.
I suspect the threshold is when it is unable to open either one of the databases at all, or when it's so corrupt some basic query fails.
Quote:
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The closest you can get to knowing from the device itself is subtle signs like the reading position not being retained across reboots.
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Ya, that's a bad sign, and one of the first.
Some others I've noticed:
- Can't delete books
- Can't delete or add books on the home screen, or the old set reappears after changing it
- Can't sync overdrive or kobo store to get new books
- Import books stops working, so new books dropped on the kobo don't show up
- Forgets saved wifi passwords and won't resave them
- Phantom books that have been deleted from the device stay in the book list and can't be opened
- Shelves can't be changed
I'm sure there's others, and which of these you might see depends on what parts of the databases are corrupted.
Note that reading position not being saved is different from the reading position shifting by a few pages when opening and closing a book. That's likely a different bug.