text: At V8.1, these limits were enhanced with IBM Storwize V7000 Gen2+. Before this release, the 
  IBN SAN Volume Controller memory manager (PLMM) only addressed 64 GB of memory. 
  
  In V8.1, the underlying PLMM was rewritten and the structure size increased. The cache size 
  can be now upgraded up to 128 GB per canister and the entire memory can now be used. 
  
  **22** Implementing the IBM Storwize V7000 with IBM Spectrum Virtualize V8.2.1 