Cryptsetup and systemd use different format options for /etc/crypttab. If you add systemd specific options then cryptsetup gives error messages which surprise users. Casual web searches on the topic don't make it obvious that there are 2 different programs doing quite different things with the same config file.
If systemd used /etc/systemd/blockcrypt.conf or something similar there wouldn't be any confusion in this regard and web searches would get more useful results. I think this is an upstream bug for misusing an existing config file. -- My Main Blog http://etbe.coker.com.au/ My Documents Blog http://doc.coker.com.au/
