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To use the HP 3PAR drivers, install the following software and components on the HP 3PAR storage system:
- HP 3PAR Operating System software version 3.1.3 MU1 or higher 
- HP 3PAR Web Services API Server must be enabled and running 
- One Common Provisioning Group (CPG) 
- Additionally, you must install the hp3parclient version 3.1.1 or newer from the Python standard library on the system with the enabled Block Storage service volume drivers. 



