Got myself a Kingston 8gb Micro SDHC card (SDC10/8GB Class 10) to replace a knackered san disk card and am having real problems with it (the new kingston that is).
I have tried it in a Pi 2 and a Pi 3 with different results but little success. Its not recognized in the Pi 2, it is recognized in the Pi 3 but with massive amounts of corruption to eventually fail to boot anything.
The first image i wrote to the card after I opened it was a copy of the file system on the corrupt sd card (which I was able to boot and backup before it failed permanently, this san disk card now wont be recognized as a valid device in anything I have tried it in, so its totally dead).
This image of the corrupt SD wrote back to another San Disk i had lying around (32gb class 6, which may also be corrupt hence it being spare) and works fine but just wont work when I try to write it to the this new kingston card.
Could writing the corrupt image have broken the card right off the bat?
Or do you think its a fake maybe?
I have noticed the write speed in etcher/windiskimager is only like 3.5Mb/s which I would have thought is way too slow for a class 10. But it starts a lot faster then slows down after a certain point, like its bad?
Every time i have written an image to it, its taken like an hour to write and verify which is suspiciously slow to me.
Would I be able to low level format either card to recover them as usable media, does anyone know?
Preferably on windows as I don't have a usb card reader i can plug into a pi.