For what it's worth regarding multiple passes to sanitize data: http://www.infosecisland.com/blogview/16130-The-Urban-Legend-of-Multipass-Hard-Disk-Overwrite.html http://cs.harvard.edu/malan/publications/pet06.pdf
On Thu, Oct 4, 2012 at 5:06 PM, Seth David Schoen <sch...@eff.org> wrote: > > I was also concerned by the "Securely Destroying Data" section. Although > it > acknowledges some situations under which erased data (or even overwritten > data) could be recovered, it seems to treat these situations as exceptional > and multiple-overwrite tools generally reliable. It doesn't mention that > these tools are potentially quite untrustworthy on current filesystems even > under normal conditions, because of data journaling. (I first learned > about > this problem from John Gilmore.) In fact, even the man page for shred > gives > a warning about this: > >
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