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Is it possible to recover data from a drive overwritten with zeros once? #

While The Great Zero Challenge was not very convincing, Daniel Feenberg's Can Intelligence Agencies Read Overwritten Data? and Craig Wright's Overwriting Hard Drive Data are. See also Disk Wiping - One Pass is Enough - Part 2 (this time with screenshots) (though it mainly addresses ordinary, software-based recovery).

UPDATES:

• The Great Zero Challenge Remains Unaccepted - archived copy of the original challenge
• Secure deletion: a single overwrite will do it | HN comments
• Can data be recovered from a zero-filled hard drive?

/misc | Jul 17, 2011

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