Virus scanners can be registered with the host storage system or any vFiler unit. You can determine whether files on a vFiler unit are scanned by virus scanners registered with the host storage system or the vFiler unit.
A virus scanner local to a vFiler unit always takes precedence over the virus scanner registered with the host storage system. If a virus scanner is registered with a vFiler unit and that scanner is functional, the files on the vFiler unit will be scanned by this scanner. If this scanner becomes unavailable, the vscan options use_host_scanners command is set to On, a scanner is registered with the host storage system, the files on the vFiler unit will be scanned by the host storage system’s virus scanner until the scanner local to the vFiler unit becomes available.