Toshiba 420CDT User Manual page 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.
The specifications for the CD-ROM drive are listed in Table 1-3.
Item
Data Capacity (bytes/block)
Mode 1
Mode 2
Rotational Speed (rpm)
Transfer Rate
Sustained Block Transfer (blocks/s)
Sustained Data Transfer (Kbytes/s)
Mode 1
Mode 2
ATAPI Burst (Mbytes/s)
Access Time (ms)
Average Random Access
Average Random Seek
Average Full Stroke Access
Data Buffer Capacity (Kbytes)
420 Series
Figure 1-7 CD-ROM
Table 1-3 CD-ROM specifications
1X mode
200 to 530
6X mode
2,048
2,336
1,200 to 3,180
75
150
171
8.33 (PIO mode 2)
350
230
500
128
450
900
1,026
190
160
330
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