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Cluster and shared mounts

A VxFS file system that is mounted with the mount -o cluster option is called a cluster or shared mount, as opposed to a non-shared or local mount. A file system mounted in shared mode must be on a VxVM shared volume in a cluster environment. A local mount cannot be remounted in shared mode and a shared mount cannot be remounted in local mode. File systems in a cluster can be mounted with different read-write options. These are called asymmetric mounts.