For a while, I managed a fleet of about 6500 iPod touch devices, and we would have random failures on devices where a simple re-image would solve the problem. I did a back of the napkin calculation, and our rate of those failures was almost exactly the expected cosmic radiation bitflip chance for the total surface area of all the storage chips in our devices.
Bitflips are fun.
For a while, I managed a fleet of about 6500 iPod touch devices, and we would have random failures on devices where a simple re-image would solve the problem. I did a back of the napkin calculation, and our rate of those failures was almost exactly the expected cosmic radiation bitflip chance for the total surface area of all the storage chips in our devices.