Toshiba Tecra 730CDT, Maintenance Manual

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1-12 730CDT
1.6 CD-ROM Drive
The removable CD-ROM drive accommodates both 12 cm (4.72-inch) or 8 cm (3.15-inch)
CDs. It provides high-performance, six-speed play, and reads 900KB per second. The drive
supports the following formats: Red-Book, Yellow-Book, CD-ROM XA, Photo CD, CD-
Bridge, CD-I, and CD Plus.
The CD-ROM drive is shown in Figure 1-7 and its specifications listed in Table 1-3.
Figure 1-7 CD-ROM drive
Table 1-3 CD-ROM drive specifications
Item 1 x mode 6 x mode
Data Capacity (bytes/block)
Mode 1 2,048
Mode 2 2,336
Transfer Rate
Sustained Block transfer speed (blocks/s) 75 450
Sustained Data transfer speed (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
Rotation speed (rpm) 200 to 530 1,200 to 3,180
Data Buffer Capacity (Kbytes) 128