ISO9660_STD_IDENT_OFFSET
if (strncmp(iso_desc + ISO9660_STD_IDENT_OFFSET, "BEA01",
5) != 0 && strncmp(iso_desc + ISO9660_STD_IDENT_OFFSET,
ISO9660_STD_IDENT_OFFSET, "CDROM", 5) != 0) {