MobileRead Forums - View Single Post - Subset of books that were sent to device are not recognized as "on device"

mst · 12-22-2020, 08:58 AM

I have a library of roughly 2,000 epubs in Calibre. When I send them to my Kobo Clara HD, they show up in Calibre as "on device", and after unplugging on KOReader, I can browse all of them by Calibre metadata.

When I re-connect my device to the computer via USB, something strange happens: Calibre refreshes the metadata file metadata.calibre, its size gets smaller, and about 150 out of these 2,000 epubs now have the "on device" mark unchecked even though they are on the memory of the reader and showed up perfectly fine as "on device" right after sending them the last time. After disconnecting the device from USB, the tags of these missing files are now also missing on KOReader. When I reconnect and send the missing books to the device again, they show up "on device" and their tags are back in KOReader, but only until the next time I connect to Calibre.

I polished all these missing books (again) in Calibre and keep re-sending them, but the problem persists. Has anybody made a similar experience and found a workaround? Or did I overlook some setting either in KOReader or in Calibre?

12-22-2020, 08:58 AM	#1
mst Connoisseur Posts: 73 Karma: 10 Join Date: Dec 2010 Device: Kobo Clara HD	Subset of books that were sent to device are not recognized as "on device" I have a library of roughly 2,000 epubs in Calibre. When I send them to my Kobo Clara HD, they show up in Calibre as "on device", and after unplugging on KOReader, I can browse all of them by Calibre metadata. When I re-connect my device to the computer via USB, something strange happens: Calibre refreshes the metadata file metadata.calibre, its size gets smaller, and about 150 out of these 2,000 epubs now have the "on device" mark unchecked even though they are on the memory of the reader and showed up perfectly fine as "on device" right after sending them the last time. After disconnecting the device from USB, the tags of these missing files are now also missing on KOReader. When I reconnect and send the missing books to the device again, they show up "on device" and their tags are back in KOReader, but only until the next time I connect to Calibre. I polished all these missing books (again) in Calibre and keep re-sending them, but the problem persists. Has anybody made a similar experience and found a workaround? Or did I overlook some setting either in KOReader or in Calibre? Last edited by mst; 12-22-2020 at 10:49 AM.