Our company simply destroys the hard drives and tapes that we no longer need. It is difficult to completely clear a hard drive of residual data. There are a few companies that offer certified solutions to clean the disks, but those can be expensive.
Although this may seem to do the job (use of a sledge hammer), there are many other ways of destroying hard drives. The use of a sledge hammer can and will put both the person swinging the hammer and the company endorsing this in serious trouble if anyone is hurt doing this.
I’m not sure that I can do this (because of IT’s policies, but I would like to send you a short article entitled “Why and How We Destroy Hard Drives”. It goes into the many ways of destroying hard drives including the sledge hammer.
If you email me at Bowindustries@aol.com, I’ll be glad to send my newsletter to you.