August 7, 201015 yr Saw someone mention this built-in function in ATA standard, Is it really able to securely erase all data? https://ata.wiki.kernel.org/index.php/ATA_Secure_Erase
August 7, 201015 yr Yup... and the reason it exists is that with sector remapping, once a sector has been remapped and a spare sector put in its logical place, you can't get back and overwrite that old sector. By using the code native to the drive, it will also overwrite the sectors marked as bad.
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