http://www.cbsnews.com/news/irs-lost-lo ... rty-probe/
WASHINGTON - The Internal Revenue Service says it has lost a trove of emails to and from a central figure in the agency's tea party controversy.
The IRS told congressional investigators Friday it cannot locate many of Lois Lerner's emails prior to 2011 because her computer crashed that year. Lerner headed the IRS division that processed applications for tax-exempt status.
But an untold number are gone. Camp's office said the missing emails are mainly ones to and from people outside the IRS, "such as the White House, Treasury, Department of Justice, FEC, or Democrat offices
You don't just don't lose emails over a single crashed hard drive. As far as I know it's the law those emails are stored on and archived on a separate server with redundancy built in.