|Storage pool volumes created using the ACSLS library type cannot be |accessed using the EXTERNAL library type, but the two library types can |coexist on the same STK library. Even though ACSLS and EXTERNAL data |coexistence is not recommended, coexistence might provide a temporary solution |during the migration for certain environments, such as, large amounts of |legacy ACSLS data and very small migration time-windows. Allowing ACSLS |and EXTERNAL library types to coexist requires that tape drives within the |library be partitioned. The ACSLS library type requires at least one |dedicated tape drive. If you choose to have data coexist, either |temporarily or long-term, be sure to implement the following in your |environment set-up: |