• I am not sure I understand exactly what you are asking.

    If the mirror fails, the first thing I would do is break the mirror and check my backups to ensure I have no transaction log pressure.

    If the principal fails, as you correctly pointed out, the mirror takes over but is advertised as disconnected. In this case as well, I would break the mirror and check my backups to remove the problems associated with transaction log pressure.

    The command you posted does exactly what it says on the tin: Allows data loss which is the opposite of what high availability mirroring is about!

    A failed mirror imho is no longer a mirror. Break it, fix the problem and reestablish the mirror as soon as you can. With a good backup plan your Transaction Logs remain reasonably small and you no longer have a problem!