Thick to Thin R2

The non-disruptive migration from thick to thin R2 devices consists of the following steps:
1. Configuring thick concurrent R11 devices on the primary array.
2. Adding a VMAX 40K or VMAX 20K/VMAX array to one branch of the concurrent SRDF topology.
3. Migrating data from thick R11 to thin R2 devices.
4. Removing one branch of the concurrent SRDF along with the original secondary (R2) Symmetrix array.

After migration, the original primary array is mirrored to a new secondary array configured with thin SRDF devices.