Toshiba satellite a20 series 用户手册

1  Hardware Overview 

 

A full-size DVD-R/-RW drive module lets you record data to rewritable CD/DVDs as well 
as run either 12 cm (4.72") or 8 cm (3.15") CD/DVDs without using an adaptor. It reads 
DVD-ROMs at maximum 8 speed and CD-ROMs at maximum 24 speed. It writes CD-R at 
up to 16 speed, CD-RW at up to 10 speed, DVD-R and DVD-RW at single speed. The DVD-
R/-RW drive is shown in figure 1-6. Specifications for the DVD-R/-RW drive are described 
in table 1-3. 

 

 

 

Transfer rate (Kbytes/s) 

33.3 (Ultra DMA) 

16.7 (PIO mode 4, Multiple word DMA transfer mode 2) 

Access time (ms) 
 Average 

Random 

Access 

 

Average Full Stroke Access 

 

Average Full Stroke Access 

 

100 

95 

160 

 

95 
90 

160 

 

170 
120 
350 

Data Buffer Capacity (Mbytes) 

2 

Supported Formats 

DVD-ROM, 
DVD-R, 
DVD-RW, 
DVD-RAM  

CD-DA, CD+ (E)G, 
CD-MIDI, 
CD-TEXT, 
CD-ROM, 
CD-ROM XA, 
CD-I, CD-I Bridge, 
Multi session CD, 
CD-R, CD-RW  

DVD-ROM 
DVD-RW (Ver.1.1)