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Friendly reminder to never forcebly shutdown your PC
(lemmy.world)
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The buffer is flushed every 6 seconds. OP was pulling down 44GB/7200sec = 6MB/s. OP would have only lost 36MB to disk caching.
If it was a single 44GB file and OP turned off less than 6 seconds after it finished, then it could have been caching. But that’s very unlikely.