Bug#967917: Fix for unit file

[Aaron Wyatt]

Also seeing this problem. The issue can be fixed by editing the unit 
file. In the [Service] section, edit the ExecStart line so that it reads:

ExecStart=/bin/true
You'll then need to run:
sudo systemctl daemon-reload
sudo systemctl restart blk-availability.service

to reload the unit file.
Cheers,
Aaron