[title]
Identify active DASD alias devices without active base device

[description]
Alias devices without active base device affect the system performance and indicate a configuration problem.
Through the Parallel Access Volume (PAV) feature, storage systems can represent the same physical disk space
 as a base device and one or more alias devices. With IBM HyperPAV, an alias can be used for any base device
 within the same logical subsystem on the storage system.
