In an Information Lifecycle Management (ILM) environment, you cannot use striping across all devices, because all data would then be distributed across all storage pools. In an ILM environment, different storage pools typically have different performance characteristics. Therefore, tablespaces should not span storage pools, and hence data files for the same tablespace should not be stored in multiple storage pools.
Storage in an ILM environment should be configured to use striping across all devices in a storage pool. If you use Oracle ASM, then separate disk groups for different storage pools should be created. Using this approach, tablespaces do not store data files in different disk groups. Data can be moved online between tablespaces using partition movement operations for partitioned tables, or using the DBMS_REDEFINITION package when the tables are not partitioned.
For information about Information Lifecycle Management environment, refer to Managing and Maintaining Time-Based Information.