/FID=file-id

    Use this qualifier to look for a specific
    file. Only the first part of the file id must be
    specified, that is , if the File id is (x,y,z) one
    must specifiy 'x' as the file-id. If this qualifier is used,
    DFU does not scan INDEXF.SYS but just looks up the specific file
    header. Therefore, this qualifier can not be combined with other
    search qualifiers such as /SIZE or /FILE.