Enhancement: Weird error when no space left on drive

[ldmtwo]

The error message I was seeing is this: "An unknown error occurred while loading this notebook. This version can load notebook formats or earlier. See the server log for details."

The problem was actually that I accidentally used up all space on the drive. It would be better if it reported that it could not write to disk. To make it worse, the dialog will close the browser tab. Imagine if you got a 404 or 503 error and it just closes your browser window. I did learn eventually that I don't have to close the dialog, which caused the tab to close.

Also, someone should clarify what that message is currently saying for the case it was written for. "can load notebook formats or earlier" --> ?

Thanks