In the snapshot creation scheduling screen in the Scheduled Tasks menu, there's no option to allow the creation of read-only snapshots. As a result, all snapshots made are writable, which may not be desirable in some cases:
I agree, this should be a very easy fix and being a NAS administrator for a Fortune 50 company, I agree this is VERY important to have.
Just created a pull request for being able to set "writable" in the GUI.
Ahhh, yes this JSON bit might be important :) Issue #1379
default writable to boolean in snapshot view(backend). #1379
Fixed by #1446