1.4 Optical Device Drives 1 Hardware Overview
Detroit 20 /Detroit 20E Series Maintenance Manual
[CONFIDENTIAL]
1-9
1.4 Optical Device Drives
• DVD-ROM & CD-RW drive
• DVD Super Multi drive supporting ±R Double Layer
1.4.1 DVD-ROM & CD-RW
The DVD-ROM and CD-RW drive accepts 12-cm (4.72-inch) and 8-cm (3.15-inch) discs. At
maximum, the drive can play back a DVD at 8x speed, read CD-ROM at 24x speed, and write
CD-R at 24x speed and Multi speed CD-RW at 4x speed or High speed CD-RW at 10x or Ultra
speed CD-RW at 24X speed.
The specifications of the DVD-ROM & CD-RW drive are listed in Table 1-2.
Item DVD-ROM mode CD-ROM mode
Data transfer rate (Mbytes/s)
33.3 (U-DMA transfer mode 2)
16.6 (PIO mode 4, Multiword DMA mode 2)
Access time (ms)
Average random access
180 150
Data buffer size (Mbytes) 2MB
Formats supported
DVD:
DVD-VIDEO, DVD-ROM, DVD-R (3.9G, 4.7G), DVD-RW
(Ver.1.1), DVD-RAM, DVD+R, DVD+RW, DVD+R DL,
DVD-R DL.
CD:
CD-DA, CD-ROM Mode1, Mode2, , CD-R, CD-RW, CD-
ROMXA Mode2 (Form1, Form2), Photo CD (single/multi-
session), Enhanced CD (CD-EXTRA), CD-Text
Table 1-2 DVD-ROM & CD-RW drive specifications
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