Well I tried one more experiment with sqlite on the ChromeBook.
If I create a database on the local storage and enable Write Ahead Journaling (
Code:
.pragma journal_mode=WAL;
) and copy the database to a USB stick, attempts to use that database fail.
If I revert to no journaling (
Code:
.pragma journal_mode=delete;
) and recopy that database to the USB stick that database works fine.
Unfortunately there is no way to change the journal mode from WAL while the database is on the USB stick
Guess I'll go for the option of rcloning the Kobo to local storage, having calibre connect to the clone and make changes, and then rcloning back to the Kobo.
At least this gives me a viable, non wireless server, means of managing the Kobo until I move back home and obtain a PC as my primary computer.