How much risk do you have of someone stealing disks from your datacenter? Take the average life span of a hard drive. The enterprise class hard drive is designed to last a minimum of 5 years. During that 5 years a SAN or NAS filled with hard disks is expected to have at least 99.999 percent uptime or better. So if you take the same approach to securing data in your datacenter as you did with your laptop, what risk have you really mitigated? None. 99.999% of the time, as that disk is up and running in the datacenter you have provided ZERO additional protection for your data. Just because it says encryption on the label does not mean security.