Chapter 11. Advanced Copy Services 515
A Storwize family system is in the storage layer by default, but the layer can be changed. For 
example, you might want to change a Storwize V7000 to a replication layer if you want to 
virtualize other Storwize systems.
In your IBM Storwize system, use the lssystem command to check the current system layer, 
as shown in Example 11-2.
Example 11-2   Output from the lssystem command showing the system layer
IBM_Storwize:ITSO-V7k:superuser>lssystem
id 0000010029C056C2
name ITSO-V7k
location local
...
layer storage
rc_buffer_size 48
...
IBM_Storwize:ITSO-V7k:superuser>
11.6.2  Multiple IBM Spectrum Virtualize systems replication 
Each IBM Spectrum Virtualize system can maintain up to three partner system relationships, 
which enables as many as four systems to be directly associated with each other. This 
system partnership capability enables the implementation of DR solutions. 
Note: Before you change the system layer, the following conditions must be met:
/SM590000No host object can be configured with worldwide port names (WWPNs) from a Storwize 
family system.
/SM590000No system partnerships can be defined.
/SM590000No Storwize family system can be visible on the SAN fabric.
The layer can be changed during normal host I/O.
Note: Consider the following rules for creating remote partnerships between the IBM 
Storwize Family systems and IBM SAN Volume Controller:
/SM590000An IBM SAN Volume Controller is always in the replication layer.
/SM590000By default, the IBM Storwize systems are in the storage layer, but can be changed to 
the replication layer.
/SM590000A system can form partnerships only with systems in the same layer.
/SM590000Starting in V6.4, an Storwize V7000 or IBM SAN Volume Controller system in the 
replication layer can virtualize an IBM Storwize system in the storage layer.
Note: For more information about restrictions and limitations of native IP replication, see 
11.8.2, “IP partnership limitations” on page 550.