OB2_DISABLE_IDB_ENCRYPTION_WARNING

During on IDB backup, important configuration and security information is processed and saved. It is highly recommended to secure such backup by enabling AES encryption in the media from unauthorised access. Doing so will disable the warning. 

Alternately, use the omnirc variable OB2_DISABLE_IDB_ENCRYPTION_WARNING on the cell manager to disable this message.

How to disable? pls guide..