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[–] 7 points 2 days ago (4 children)

Some modern hard drives transparently encrypt all data with an internal key, which can be erased with a special secure erase command. Comes in handy for wiping drives without spending hours overwriting the enire disk.

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  • [–] 2 points 2 days ago (3 children)

    How does a hard drive include enough processing power to encrypt/decrypt things without having any impact on read/write times?

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