Comprehensive and Detailed Explanation From Exact Extract:

Portworx implements Role-Based Access Control (RBAC) to secure management operations within the cluster. One of the key built-in roles is system.admin, which has full administrative privileges across Portworx resources. This role allows users to manage storage nodes, volumes, snapshots, backups, and cluster-wide settings. The system.admin role is typically assigned to trusted cluster operators or administrators responsible for cluster maintenance and configuration. Other roles like storage.manager or storage.admin are not standard built-in roles in Portworx RBAC but may be custom roles defined in some environments. The official Portworx security and RBAC documentation details system.admin as the comprehensive administrative role with full cluster management capabilities, critical for secure operations and delegation of responsibilities【Pure Storage Portworx Security Guide†source】.