Which PowerFlex feature allows the sharing of storage data across multiple nodes?

PowerFlex is primarily a block storage solution, but it supports File Services (PowerFlex File) to allow data sharing across multiple nodes.

PowerFlex File (Shared File Systems): This architecture adds NAS (Network Attached Storage) capabilities to the PowerFlex cluster. It utilizes NAS Nodes (which can be physical or virtual) that consume PowerFlex block volumes and format them with a file system. These file systems are then exposed to clients via standard protocols like NFS (Network File System) for Linux/Unix and SMB (Server Message Block) for Windows. This allows multiple compute nodes or users to read and write to the same logical storage space simultaneously.

Why not the others?

Fault Sets are for logical isolation of resources to ensure high availability, not for data sharing.

Storage Pools are groupings of physical drives to define performance tiers, not the mechanism for file sharing.

Replication is for disaster recovery (copying data to a remote site), not for active sharing within a cluster.