With the copy export support (discussed above) when logical volumes are copy exported, the copy exported physical volumes (from the same source TS7740) are placed into an empty TS7740 Virtualization Engine. In this case, the host data base information and the composite library name associated with the copy exported logical volumes remains the same. Starting with Release 2.1 of the TS7700 Virtualization Engine, a new copy export merge function is being introduced that will enable customers to take the copy exported physical volumes (generated in the process above) and merge them into an existing TS7740 with data (where before the copy exported volumes (from a single source TS7740) needed to be placed into an empty TS7740). In this case, since the composite library that the logical volumes are being entered into is different, the customer will need to make the appropriate host data base changes (e.g. volume record in the tape configuration data base as well as tape management system changes) to show in which library the copy exported logical volumes now reside. For the recovery of the copy exported volumes, a modified disaster recovery process is used instead of an import so the host is not notified when the volumes are brought into the library. For a detailed discussion of the copy export function and copy export merge refer to the TS7700 Customer Information Center.