Quote:
Originally Posted by GeoffR
It depends on what changes you make. If you change the file structure of the book (add, rename or delete files) or if you change parts the OPF or NCX or the places in the book that are linked to in the NCX then you should delete the book before reloading it, otherwise the database will still have the info from the old book which won't match the new book. This can cause unpredictable effects while trying to navigate the book.
If you just change the content of the book, fixing spellng mistakes or replacing images (without changng their filenames) etc., then it is okay to resend the updated book to the device without deleting it first.
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A perfect, exactly what I wanted to know, thanks
Quote:
Originally Posted by GeoffR
So in short, it is probably possible to fake the statistics, but it would be a lot of effort, I think you would have to insert a lot of fake reading sessions into the database.
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Aww that's a shame! Thank you for explaining
Quote:
Originally Posted by koboy
regarding the book covers, do you have more than 100mb of free space on the Glo? if not delete some books until you have at least 150mb spare, and then see if the book covers are showing.
best wishes koboy 
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I'm not actually sure how much space I have left, but interesting point, something I should keep an eye on indeed. Thanks!
Quote:
Originally Posted by davidfor
For the firmware to get the kepub cover, the important bit is the "properties". The id has to there, but it is used as a cross-reference to other entries in the OPF. It doesn't matter what the value is.
If you have kepubs without the properties for the cover image that are showing covers, the covers probably got there some other way. Either the driver has been configured to send the covers or you used the Kobo Utilities to send them.
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Ah good to know. I was wondering about that because all the books that I checked that
were showing covers didn't have the properties tag so I was confused. But indeed, I have the magic Kobo Utilities set to stick its nose into cover things.
Quote:
Originally Posted by davidfor
If he did a check on the database and kept the list of errors, I'd be interested in seeing them. I have fixed databases in the past, but with very limited type of errors.
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I'm not sure if he saved anything, I'll ask and post the file if he saved it.
Quote:
Originally Posted by davidfor
It really depends on when the cover didn't show up. If it never did, then it probably means the driver couldn't identify the cover and set the property when the book was sent. If it disappeared after a while, I don't know. There is a discussion on this in the extended driver thread with no conclusion. I did have some problems with firmware 3.16.10 and 3.17.0 that meant the stored cover image file was empty. In these cases, the cover was not displayed after I restarted the device. Removing the files and restarting the device generated correct covers. I think I have seen disappearing covers with 3.17.3, but haven't had one since the discussion started.
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I don't think the covers ever showed up. Why would the driver not be able to identify the cover? It shows in calibre and all links refer to the correct place within the file as far as I can see in Sigil. I don't think I've seen covers disappear yet... fingers crossed... sounds like an annoying frustrating weird bug.
Quote:
Originally Posted by davidfor
I can't help with getting the reading stats back after a factory reset. Some will come back from the Kobo server if syncs happen, but not all. For marking the books as read, just select the books you have read in your calibre library and update the device using the mentioned Kobo Utilities plugin. Of course, that needs an indication in the library. I put all the read books in a reading list. And in the past, I had a Yes/No column that I set to yes when I read the book. Of course, nowadays I let the utilities plugin do all the hard work.
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Oooh the possibilities with Calibre and this plugin are just endless! I'm away for a few months and BAM I have no idea what's going on any more. Sounds absolutely delicious, I'm going to try this out. Thanks! Shame about the statistics. I suppose it's understandable that it's not an easy thing to tweak because it's not made or tweaking at all. But with the high risk of factory reset necessity it would be nice if there were some way to put data back. But yes database backup is the way to go. It's the first thing I did after the corruption got fixed and I'll definitely do it more often. It would be so sad to lose all the reading session time... like your 999 hours (I saw in a different thread)! Did you ever find out if that was a weird glitch (like, Kobo can't count higher than 3 digits or something... haha) or your actual reading time?
Thanks!