We have been told Lois Lerner lost 2 years worth of emails due to a crash of her hard drive. We were told the disc had bad sectors and the data could not be recovered. According to documents provided by the IRS, Lerner was archiving her e-mails on her local hard drive, which developed fatal problems (bad sectors) in the middle of June 2011. The data proved unrecoverable despite heroic efforts on the part of the IT staff. Let's delve into this a little deeper. Exactly what is a hard disc sector? In computer disk storage, a sector is a subdivision of...