I/O errors can occur for several reasons, including failures of Fibre Channel links, host-bus adapters, and disks. SFCFSHA disables the file system on the node encountering I/O errors. The file system remains available from other nodes.

After the hardware error is fixed (for example, the Fibre Channel link is reestablished), the file system can be force unmounted from all the active nodes in the cluster, and the mount resource can be brought online from the disabled node to reinstate the file system.