brucewells Loc: Central Kentucky

:thumbup:

Light Red

Thanks - great sketches.

LR

singleviking Loc: Lake Sebu Eco Park, Philippines

Marco,
There is always the chance that the micro-controller in the SD card failed. This is a device that controls what memory addresses are valid and which should be not used. Most SD cards have more memory than is listed and manufacturers use defective 64 Gig cards as acceptable 32 Gig cards by disabling the defective sections of memory through the use of an on board micro-controller. With certain software and access to the whole memory, you can recover lost data but not all in most cases. To save money and use every die on a wafer, they utilize this scheme for economy. Wafer fab lines are very critical in temps and etching and are not shut down if possible. They used to throw memory into the line to keep it going when there was slack orders for more complex chips.
Profit margins are thin for SD memory and every die that can be used is packaged. Then, it's classified for size and speed before labeling and defective areas are avoided by use of this micro-controller reducing the overall memory capacity and the lookup table and control program are installed into the device during testing.

Hey...SHIT HAPPENS. and in most cases the free recovery software programs work but if the micro-controller is damaged or suffers infant mortality, it needs special hardware and software programs to recover data. If you remove the cover of SD modules, you will see a second set of contacts for access to the whole device and it's internal micro-controller access pins.

Light Red

WOW!!!

Thanks

LR

amehta Loc: Boston

It may not be this complicated, so putting the card in a card reader or SD slot in a computer and using recovery software is worth a try first. If the directory listing is corrupt, the files can be saved.

Light Red

Thanks

LR