HLDS Specifications
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Feature Description
Manufacturer Hitachi/HLDS
Model GWA-4082N
Average random access time
  • DVD-ROM: 160 ms typical
  • CD-ROM: 140 ms typical
Write speed: (approximate)
  • DVD-R: 2X CLV, 4X ZCLV, 8X CAV
  • DVD-R DL: 2X CLV
  • DVD-RW: 1X, 2X CLV, 4X ZCLV, 8X CAV
  • DVD+R: 2.4X CLV, 4X ZCLV, 8X CAV
  • DVD+R DL: 2.4X CLV
  • DVD+RW: 2.4X 3X CLV, 4X 8X ZCLV
  • CD-R: 10X CLV, 16X, 24X ZCLV
  • CD-RW: 4X,10X CLV, High Speed:10X, Ultra Speed and Ultra Speed Plus 16X
Read speed:
  • DVD-R/RW/ROM 8X8X/8X maximum
  • DVD-R DL: 4X maximum
  • DVD-Video (CSS): 4X maximum Single/Dual layer
  • DVD+R/+RW: 8X/8X maximum
  • DVD+R DL: 4X maximum
  • CD-R/RW/ROM: 24X/24X/24X maximum
  • CD-DA (DAE): 20X maximum
Sustained transfer rate
  • DVD-ROM: 11.08 M/bytes per second (8X maximum)
  • CD-ROM: 3,600 kB/s (24X maximum)
Burst transfer Mode
  • Ultra DMA Mode 2
  • Multi-word DMA Mode 2
  • PIO Mode 4
Writing method
  • DVD-R: Disc at once, Incremental recording
  • DVD-RW: Disc at once, Incremental recording, Restricted overwrite (DVD-RW only)
  • DVD+R Single Layer: Sequential recording
  • DVD+R Double Layer: Sequential recording
  • DVD+RW: Sequential recording, Random recording
  • CD-R/RW: Disc at once, Track at once, Session at once, Packet write
Disc diameter 120 mm and 80 mm
Data capacity (bytes per block) DVD-ROM/R/RW/+R/+RW: 2,048 bytes/block
CD (Yellow Book):
2,048 bytes/block (Mode1 and Mode2 Form1)
2,336 bytes/block (Mode2)
2,328 bytes/block (Mode2 Form2)
2,352 bytes/block (CD-DA)
Sustained data transfer rate (Write)
  • DVD-R: 2X CLV, 4X, ZCLV, 8X CAV 2.77, 2.77-5.54, 5.44-11.08 Mbytes/s
  • DVD-RW: 1X 2X CLV, 4X 6X ZCLV 1.385, 2.77, 2.77-5.54 2.77-8.31 Mbytes/s
  • DVD+R: 2X CLV, 4X ZCLV, 8X CAV 3.32, 3.32-5.54, 4.57-11.08 Mbytes/s
  • DVD+RW: 2.4, 3.3X CLV, 4X 8X ZCLV 3.32, 4.57 3.32-5.54 4.47-11.08 Mbytes/s
  • CD-R: 10X CLV,16X, 24X ZCLV 1,500, 1,500-2,400, 1,800-3,600 kB/s (Mode-1)
  • CD-RW: 4, 10X CLV 16X ZCLV 600, 1,500 1,500-2,4000 kB/s (Mode-1)
Sustained data transfer rate (Read)
  • DVD-ROM Single/Dual layer: 4.58 - 11.08 Mbytes/s (8X maximum)
  • DVD Video (CSS): 2.29 - 5.54 Mbytes/s (4X maximum)
  • DVD-R: 4.58 - 11.08 Mbytes/s (8X maximum)
  • DVD-R DL: 2.29 - 5.54 Mbytes/s (4X maximum)
  • DVD-RW: 4.58 - 11.08 Mbytes/s (8X maximum)
  • DVD+R: 4.58 - 11.08 Mbytes/s (8X maximum)
  • DVD+R DL: 2.29 - 5.54 Mbytes/s (4X maximum)
  • DVD+RW: 4.58 - 11.08 Mbytes/s (8X maximum)
  • CD-R/RW/ROM: 1,550 - 3,600 kB/s (24X) maximum
  • CD-DA (DAE): 1,290 - 3,000 kB/s (20X) maximum
  • CD-DA (Audio out)/CD-I/Video CD: 650 - 1,500 kB/s (10X) maximum
Burst transfer rate
  • 33.3 Mbytes/s maximum (Ultra DMA Mode 2)
  • 16.6 Mbytes/s maximum (DMA MW Mode 2)
  • 16.6 Mbytes/s maximum (PIO Mode 4)
Data buffer 2 MB
Power supply +5 V, ±5%
Operating temperature 5 to 50° C
Storage temperature -30 to 60° C
Operating humidity 15% to 85%
Storage humidity 10% to 90%
Dimensions (W × H × D) 128 × 12.7 × 129 mm
Weight 180± 7grams (without bezel)