ORA Database Error Messages ORA-16646: Fast-Start Failover is disabled October 6, 2015 mpbod ORA-16646: Fast-Start Failover is disabled Cause: The operation was not allowed because Fast-Start Failover is disabled. Action: Enable Fast-Start Failover and retry the operation. Back to previous menu Share this:Click to email a link to a friend (Opens in new window)Click to print (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Tumblr (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on Pinterest (Opens in new window)Click to share on Reddit (Opens in new window)Click to share on Pocket (Opens in new window)