Any details on what the new/old pinouts were?

The sata power spec gives 3.3, 5, and 12 volt rails, but I believe most devices now don't use 3.3 or 5 volt rails at all because they want to use their own internal voltage regulators where power up scheduling is more predictable (ie. Ramp rates etc).

Given that, the drives probably only used 12v and gnd, any miswiring could only have been reverse polarity??