If wdisable (write disable) or mwdisable (metadata-write disable) is selected, the file system is disabled or degraded, depending on the type of error encountered. Select wdisable or mwdisable for environments where read errors are more likely to persist than write errors, such as when using non-redundant storage. mwdisable is the default ioerror mount option for local mounts.

See the mount_vxfs(1M) manual page.