Il Mio Problema
Internal 1Tb hard drive developed a SMART failure and would no longer boot.
La Mia Riparazione
After reading the guide several times, and making sure I had everything ready, I followed the instructions and successfully replaced with a 4 Tb drive.
Then reinstalled OS X.
Il Mio Consiglio
Remember, you can't read the guide too often!
Be ca . . .