Restore of courses sometimes fails with:
Could not restore modules!
An error has occured and the restore could not be completed!
The error occurs while restoring a test.
Additionally the layout of the site is changed, all blocks are deleted and I have to add manually the blocks I want to see. It's really strange that a restore not working can change the page layout and delete the blocks.
And last but not least a backup of the site is not running without errors, because the course with the crashed restore cannot be backuped, the log says "error".
With this problem the migration to a new server is a really big problem, so far we have to stay on our old server.