I have bought to my kid a “2TB” external drive on AliExpress, but I have now realized that it may just come with hacked firmware, so I am looking for a tool to check the actual capacity of a mounted path without errors.
I am posting on “offtopic” because if such a tool already exists, all good, I am not going spend time on it:-)), but if it doesn’t exist, I am thinking to a Julia script that, provided with the path to lookup, the declared capacity and a chunk_size, would loop over the chunks, create random bits of chunk_size, cheksum the chunk, write it on the target path, and read back it and all the previous chunks in order to cheksum them back.
This of course would lead to a trade-off on chunk_size between speed and practicability/accuracy..
Also, perhaps you have a better idea (instead of random bits, use some sequence that has computable check-sum or that can be sampled in reading???)…
I’d write 2000 x 1GB files to the disk, containing pseudo-random data. Then read each file back and check it equals what you expect by generating the same pseudo-random data again. Count how many match. No checksums required.
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Of course it seems that such tools are already widely used, e.g. “f3” (“Fight Flash Fraud”, or “Fight Fake Flash”).. there are always new things to learn…