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Preclearing 8TB external SMR drives taking an extraordinary amount of time...


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First and foremost, I know SMR drives are known to have poor write speeds, but my understanding was that it was smart enough to know if it's writing multiple whole shingled sections (like y'know, writing the entire disk) it would know to just write through, rather than caching etc.


I was getting what you'd expect for read speeds, something like 160MB/s, but now in the write phase, it's 12MB/s. Is this because they're going through the USB controller, or are they really that dumb, or....what?

Obviously can't be shucking these for my array if they're *that* slow consistently. The idea was to be that it could handle loading large chunks of data without going through the SMR shuffle.

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