Repair a Corrupted SD Card?

Question

My Raspberry Pi SD card has gotten corrupted (possibly from accidently running a high amp current through the Pi) and I would like to recover some of the files.

I have tried using several ext4 format readers such as Paragon, and they haven't worked. I've tried to run a live Linux enviroment, but the corrupted SD card makes mounting it impossible.

I took a .ISO disk image copy of the SD card, divided into partitions, and converted that disk image into a text file, which I can view using the built in emacs software. Here, I can clearly see the corrupted sections of the SD card. For example:

The red number codes (I believe) are the corrupted parts - there is much more than this.

My question is: Is it possible that there is a pattern to the numbers that appear in corrupted places? In other words, can I "decode" the corruption and repair the corrupted sections using a custom program (Or is there already one in existence)?

Answer 1

What you see is not evidence of a corrupt SD card, but rather artefacts of a program not being able to display your encoding. Try opening the file in another editor, alternatively have a look at this question for a discussion around encodings in emacs.