420 Series 1-11
1.6 CD-ROM Drive
The 420 series internal CD-ROM drive accommodates either a 12 cm (4.72-inch) or an 8 cm
(3.15-inch) CD. It provides high-performance six-speed play (reads 900KB per second).
This drive supports the following formats:
Audio CD
Photo CD
ISO 9660
CD Plus
The CD-ROM drive is shown in Figure 1-7.
Figure 1-7 CD-ROM
The specifications for the CD-ROM drive are listed in Table 1-3.
Table 1-3 CD-ROM specifications
Item 1X mode 6X mode
Data Capacity (bytes/block)
Mode 1 2,048
Mode 2 2,336
Rotational Speed (rpm) 200 to 530 1,200 to 3,180
Transfer Rate
Sustained Block Transfer (blocks/s) 75 450
Sustained Data Transfer (Kbytes/s)
Mode 1 150 900
Mode 2 171 1,026
ATAPI Burst (Mbytes/s) 8.33 (PIO mode 2)
Access Time (ms)
Average Random Access 350 190
Average Random Seek 230 160
Average Full Stroke Access 500 330
Data Buffer Capacity (Kbytes) 128
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