Lenovo ThinkServer RD240 Software User's Manual page 271

Figure 8.13 Drive Security Settings Menu
The Enable Drive Security – Introduction screen appears as shown
in Figure 8.14. This screen describes how the wizard will help you
create a security on the controller. After you create a security key,
you have the option to create secure virtual drives using the security
key.
First, create the security key identifier. The identifier appears
whenever you have to enter the security key. If you have more than
one security key, the identifier helps you determine which security
key to enter.
Next, create a security key. You need the security key to perform
certain operations. Finally, you have the option to create a
Selecting Full Disk Encryption Security Options 8-19