That works perfect! I had already created new zvol with ext4 on my zfs volumes, but that didn’t help 
. I’ve now changed that line to True and it starts, I was able to start it and create a new account.
Thanks a lot!
Is the wiki public? Otherwise you may want to add this to a note or something.
Edit: to be clear for others running into this, I couldn’t get the mssql-docker-zfs - Hack (github link above) to work:
- create a zvol on zfs, format as ext4
- make sure docker uses it as its data, set filesystem driver to overlay2
- set the setting # Parameter:MssqlDataDockerVolume=True as stated above