Impossible synchronisation

[filmo]

I had this happen once and solved by factory reset, then only way I could get reader to start was without external SD card. I then had to reformat SD card then load books in small batches from Calibre.

Another time I had corrupted hard drive. I had a windows utility repair the hard drive file system with no loss of data on the hard drive.

[samhy]

When this happens to me, it's usually close to a firmware release so I've always thought it was because the servers were busy/highly solicited.

[davidfor]

Originally Posted by Gadget Guy

I recently loaded some books to my Kobo via Calibre and the first batch worked great. The next day I tried to load more, but Calibre could not see the Kobo properly. After that - I could power on, but not see any of the books I had loaded onto the device. I did a factory reset and went to set up the reader again and it gets stuck at the beginning (spinner spinning, but that's it).

If I connect to Calibre, I get the following error:
calibre, version 1.9.0
ERROR: Error: Error communicating with device

database disk image is malformed

Traceback (most recent call last):
File "site-packages\calibre\gui2\device.py", line 85, in run
File "site-packages\calibre\gui2\device.py", line 480, in _books
File "site-packages\calibre\devices\kobo\driver.py", line 343, in books
DatabaseError: database disk image is malformed

Any idea how I can get this thing functional again?

It means the database on the device has become corrupted. From where the error is detected in the code and your listed device, I think you have either the original reader or a WiFi. Unless you have a backup of this, I think the only thing you can do is a factory reset.