/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 specify'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.