77Appendix A SpecificationsUltraDMA mode 4 66.6 MB/sUltraDMA mode 2 33.3 MB/sMulti-word DMA mode 2 16.6 MB/sData transfer ratePIO transfer mode 4 16.6 MB/sRandom (including average rotational delay)DVD-RAM drive 240msDVD-ROM 140msAverage access timeCD-ROM 130msBuffer capacity 2 MBOutside dimension 146 (width) × 190 (depth) × 41.3 (height) mmWeight About 0.95 kgPower supply (rating) +5 VDC 1.0A+12 VDC 0.8APower consumption (rating) 14.6WEnvironmental requirementOperating Ambient temperature 5 ºC – 45 ºC(Temperature change rate: 10 ºC/h)Relative humidity 10 % - 80 %RHHighest dry bulb temperature 29 ºC (without condensation)Carriage Ambient temperature –30 ºC - 60 ºCRelative humidity 5 % - 90 %RHHighest dry bulb temperature 29 ºC (without condensation)Vibration Operating 1.96 m/s 2 or lessCarriage 9.8 m/s2 or less