http://techreport.com/review/27909/the-ssd-endurance-experiment-theyre-all-dead
Testing SSD writes until they can write no more...
QuoteOur solid-state death march was designed to test the limited write tolerance inherent to all NAND flash memory. This breed of non-volatile storage retains data by trapping electrons inside of nanoscale memory cells. A process called tunneling is used to move electrons in and out of the cells, but the back-and-forth traffic erodes the physical structure of the cell, leading to breaches that can render it useless.