Re: Magic?
Back in the day (1960s), we kept all the computer gear in the Glass House at a specific temperature for the simple reason that Core Memory liked it that way[0]. This meant leaving drives powered on. Drive hardware was pretty flaky back then, and the drives would sometimes fail on the rare re-start. As a result, the myth came about that all drives failed on restart. Which carried over to the world of PEE CEEs in the '80s.
Intelligent drive monitoring started with IBM's AS/400 line, with what IBM called "Predictive Failure Analysis" tools. These came to be known as "PFAAARGH!", for somewhat obvious reasons. This was in the early '90s. SMART drives came from an industry consortium in the mid '90s, with the first units in the market by late '95 or thereabouts.
The biggest change I witnessed with the advent of SMART technology was that it gave Management yet another excuse to cut proper backups out of the budget ... "If the drives say they aren't about to fail, why do we need to spend gobs of money on backup?" was a question I heard all too often.
[0] Little known fact: Most of the power consumed by Core Memory was used to heat it up, in order to keep it within the optimal working temperature.