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ProGrade 512GB vs Sony Tough 128GB (UHS-II SD "Fight")

Started 9 months ago | Discussions thread
Joep van Steen
Joep van Steen Contributing Member • Posts: 575
Re: Weirder...

RLight wrote:

User1303423862 wrote:

Might it be possible to put the problematic card in a twin card camera and synch to a fresh card?

Actually data cloning from bad to good donor is one means of data recovery. File type scanning is another.

They're complementary, really.

Step 1 is cloning (or imaging = cloning to file, which I prefer in case of data recovery from memory cards). You clone using a good quality card reader preferably. Depending on physical state of the card you may be able to do this using file recovery software like R-Studio or DMDE. If state is bad (many bad sectors, drive dropping from OS repeatedly) you better use ddrescue.

Then step 2 is put 'patient drive' aside and do file recovery from the 'disk' image using file recovery software.

Depending in state of file system, you do file system based or 'raw' recovery. File system based is always preferred as file system allows us to resolve cluster chains for non contiguous files (for non deleted / lost due to formatting files) and produces original filenames + folder structure.

If file system based recovery produces corrupt files, try raw (signature based recovery) as seemingly corrupt files may be product of corrupt file system. Raw recovery scans for start and end of a file. Fragmented files can not be recovered this way.

But it is of course possible files themselves are corrupt, in which case corrupt files are all that you'll be able to recover. Depending on actual damage it may or may not be possible to repair files.

My personal goto tool for this type of recovery is DMDE, it's my 'daily driver'. Often it is good enough to clone (but I am using professional hardware to handle instability issues), do filesystem based recovery and do basic raw recovery of non fragmented files. I m using pro version of DMDE, but free demo is generous and allows you to recover 4000 files per folder/session).

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Joep

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