Storage Spaces Direct (S2D) and SAN storage can now operate side-by-side in the same single rack failover cluster - so you can take advantage of S2D speed for some volumes, and SAN features for OTHER volumes. This allows you to run Hyper-V VMs or SQL Server Failover Cluster Instance (FCI) scenarios on fast S2D storage or on your SANs to take advantage of SAN features like snapshots, backups, and deduplication.
Applies to: Windows Server 2022 and Windows Server 2025 Failover Clustering
Failover Clustering has supported SAN storage since Windows NT 4.0 Server, Enterprise Edition was released in 1997!
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Published Dec 04, 2025
Version 1.0
Rob-Hindman
Microsoft
Microsoft