"Failed to open file '/etc/crypttab" message is getting repeated over and over again in logs. Please make it just check once if crypttab is there or not to prevent the logs getting cluttered
/etc/crypttab is used in Fedora, Debian, and Ubuntu after quick look and it seems distribution specific file not bound to any standards.
In Gentoo we configure these in /etc/conf.d/dmcrypt with different syntax.
Gentoo will propably switch to using /etc/crypttab too just to be closer to others but it will take some time
Sure thing, fixed here: