Note that repeating the operation should not be necessary nowadays. However because of block sizes, these sections would only amount to a few theoretically recoverable KiB.Ī single, full overwrite with zeros or random data does not lead to any recoverable data on a modern high-density storage device. Thus a full overwrite would not reach it. If a hard drive marks a sector as bad, it cordons it off, and the section becomes impossible to write to via software.
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