Library /sys$common/syshlp/sysmanhelp.hlb IO, SCSI_PATH_VERIFY, Description  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    You usually enter the IO SCSI_PATH_VERIFY command after
    performing an online reconfiguration of a SCSI or an FC
    interconnect. The command reads the device type and device
    identifier on each SCSI and FC path in the system. If the device
    does not match the data stored in the IO database, then the
    path is disconnected in the IO database. Following an IO SCSI_
    PATH_VERIFY command, you usually enter an IO AUTOCONFIGURE
    command, which updates the IO database to match the new SCSI
    or FC configuration.