Cause and effect
Hi, maybe they were damaged because some eejit got two of the wires on the daisy chained SATA outputs mixed up ie 5V and 3.3V
I believe that the test program if they were even tested at all only checks for correct voltages on the main connector, so this might have been missed.
Have had this happen before, needless to say the drive (a very expen$ive external) did not recover and emitted volumes of smoke before I could pull the plug.
Upon testing its nominal 5V was around 14.3 and dropped down to 8V under load.