Every few years you are going to need to replace your enterprise storage system. The chances of you being unlucky enough to have thrown your system out or put it on an auction site and then have someone pull usable data from those drives is unlikely. Most administrators will at least format the drives, but it may not be enough to meet the laws surrounding public release of private information. Encryption is needed, and embracing storage encryption now can save a lot of headaches later, says Storage Switzerland’s George Crump.”]
Source: https://www.darkreading.com/database-security/disposing-of-primary-storage