That is correct. A certain amount of metadata is required for devices and again it is a finite resource.
Below is the output from couple of VMAX 250F arrays. Can someone explain me the difference between Array Usage Meta data % and Replication usage meta data %.  What is the difference ? How can i calculate the total value ? In the second VMAX array usage Meta data is 100%. Does this mean this arrays needs to convert cache to meta data page space for future allocations ?  [IMAGE]
Can someone explain how to interpret the meta data values from below output ?