What I would like to see, to complete the article, is for it not to be left in the state of “the critical step that’s missing is…” and see a definition of how to apply the critical step. From your article I cannot tell whether it is too late at this point to take those steps, or whether a totally different approach would be required because you “can’t get there from here”, or what?

In the examples in my blog post (using the online redologfiles) I’ve already addressed the ‘open filedescriptors trap’ by shutting down the database during that example.

This just shows once again that careful planning of a recovery and knowing your stuff pays off, and that taking a shortcut could cost much more in the long run!

You would also need to do “begin backup” before the cat and “end backup” after the cat. Otherwise you may get fractured blocks.