text: However, the write cache is still assigned to a maximum of 12 GB and compression cache to 
  a maximum of 34 GB. The remaining installed cache is used as read cache (including 
  allocation for features, such as FlashCopy, Global, or Metro Mirror). 
  
  **Note:**When installing cache in your IBM Storwize V7000 Gen2+ and upgrading to V8.1, 
  the error message “1199 Detected hardware needs activation” appears in the GUI event 
  log with an associated error code 0x841 in CLI. Run the command**chnodehw <node_id>**
  **-force**for each affected canister in sequence or perform the fix procedure by using the 
  GUI. 