(Failover cluster) Data I/O

✅ Where Does Each Node Write Data in an S2D CSV Cluster?

🧱 On S2D + CSV:

• Each node has local disks (SSD/NVMe/HDD) that form a Storage Pool.
• S2D makes a virtual disk (resilient via mirroring or parity) using all nodes’ drives.
• CSV allows all nodes to access this virtual disk simultaneously.

🔄 Where Is Data Written?

• Any node can write I/O locally to a CSV.
• That I/O is sent through the S2D fabric, and data is mirrored/paritied to other nodes’ drives for redundancy.
• One node per CSV acts as Metadata Coordinator, but actual data I/O is distributed.

✅ So: Each node writes to its own storage, but the data is replicated across the cluster — other nodes don’t "pull" from it; S2D manages distribution behind the scenes.