Mitigating the damage

From IT Blogwatch at Computerworld, where the discussion is about the recent incident of attempted sabotage by a disgruntled ex-employee. The individual still had admin privileges on all the servers where he placed a script that, had it worked, would have erased all data and backup data on those servers by overwriting with zeros.

To the rescue comes a commenter at Slashdot:

Technically, all of the data in a computer is really just a bunch of ones and zeros, so assuming a fairly even mix of those two possibilities, writing over everything with zeros would only change half of their data.