True or False: When configuring shared cluster storage, NFS is a high availability option.

True or False: When configuring shared cluster storage, NFS is a high availability option.

• A. Not Supported
• B. False
• C. True
• D. Only on Linux

Answer: (B)

Shared cluster storage relies on a block-level disk that is presented to all cluster nodes with proper locking and fencing, so the cluster can entirely control ownership of that disk. NFS is a network file system that operates at the file level, not at the block level, and it doesn’t provide the same guarantees required for a shared disk used by a failover cluster. Because the cluster needs a single, authoritative view of the disk for failover and resource management, NFS-backed storage isn’t considered a valid high-availability option for the cluster's shared storage. You can still use NFS to share files between nodes, but it does not fulfill the role of shared storage for clustering.

Shared cluster storage relies on a block-level disk that is presented to all cluster nodes with proper locking and fencing, so the cluster can entirely control ownership of that disk. NFS is a network file system that operates at the file level, not at the block level, and it doesn’t provide the same guarantees required for a shared disk used by a failover cluster. Because the cluster needs a single, authoritative view of the disk for failover and resource management, NFS-backed storage isn’t considered a valid high-availability option for the cluster's shared storage. You can still use NFS to share files between nodes, but it does not fulfill the role of shared storage for clustering.