Destroy, don't delete your old hard drives

Research says that erasing a hard drive isn't enough. Smash it with a hammer instead.

Dave Rosenberg Co-founder, MuleSource
Dave Rosenberg has more than 15 years of technology and marketing experience that spans from Bell Labs to startup IPOs to open-source and cloud software companies. He is CEO and founder of Nodeable, co-founder of MuleSoft, and managing director for Hardy Way. He is an adviser to DataStax, IT Database, and Puppet Labs.
Dave Rosenberg

BBC News reports on a study by computing magazine Which? where they recovered 22,000 "deleted" files from eight computers purchased on eBay.

The recommended way to really make sure your data is gone is to take a hammer or drill to the drive and completely destroy it. Just think of all the YouTube fun to be had destroying computers and cell phones.