Back in the early oughts I had external drives in drive enclosures and have had one or two of those (or other devices) that used SATA or eSATA cables to plug to the motherboard. I still have cables somewhere.

That whole "master and slave" terminology was in other technology as well. Did anyone else drive a standard transmission car or truck with a master and a slave cylinder for the transmission fluid? It was an appalling set of terms even back then.