Cool TIL about mdutil. I still cannot disable it as mdutil seems to be having trouble parsing the path to the share. Ive tried in bash/zsh/sh with all quoting/escaping patterns I can think of and I must be missing something.
(shows up in in `mdutil -s -a`)
/Volumes/Backups of Saucy's MacBook Pro:
Indexing enabled.
sudo mdutil -i off /Volumes/Backups\ of\ Saucy's\ MacBook\ Pro
Error: could not resolve path `/Volumes/Backups of Saucy’s MacBook Pro'.
(shows up in in `mdutil -s -a`)