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1 Hardware Overview 1.4 DVD-ROM Drive
1.4 DVD-ROM Drive
The DVD-ROM drive accepts 12-cm (4.72-inch) and 8-cm (3.15-inch) discs. The drive
provides high-speed data transfer, playing back a DVD at up to 8x speed and reading up to
10,820 Kbytes per second from DVD-ROM and 3,600 Kbytes per second from CD-ROM.
The DVD-ROM drive is shown in Figure 1-6 and its specifications are listed in Table 1-2.
Figure 1- 6 DVD-ROM drive
Table 1- 2 DVD-ROM drive specifications
Item DVD-ROM
Data transfer rate (Mbytes/s) 33.3 (U-DMA transfer mode 2)
16.7 (PIO mode 4, Multiword DMA mode 2)
Access time (ms)
Average random access
100ms
Data buffer size (Kbytes) 192KB
Formats supported DVD-R/W(Read only), DVD-R (Read only),DVD-
RAM ,
CD-ROM, CD-R,CD-DA,CD-I,CD(Photo-CD,CD-
EXTRA,CD-R,CD-RW,Portiolio)
CD-R (Read only), CD-RW (Read only)
EQUIUM M40/M45/Satellite M40/M45 Maintenance Manual 15