SONY DRU-800A = SONY DW-Q28A = LiteOn SOHW-1693S
SONY DRU-820A = BenQ 1670
SONY DW-G120A = LiteOn SHM-165P6S

所以SONY DRU-800A無法升級820A
除非保固期內故障送修才有"機會"換到820A，賭機率 = =|||