Sony PCV-L640 Reference Manual - Page 17
Drives, Identifying Components, Description - cd drive
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Drives Identifying Components 3 FD DISC HD CD-RW disc drive Floppy disk drive SHA0002.VSD Drive Diskette drive CD-RW drive* Description 3.5-inch, 1.44 Mbyte. CD-ROM disc read: 20X (maximum performance). CD-R disc read: 20X (maximum performance). CD-R disc write: 4X (maximum performance). CD-RW disc read: 14X (maximum performance). CD-RW disc write: 4X (maximum performance). * The CD-RW/CD-R/CD-ROM data transfer standard 1X rate is 150 kbytes/s. Data on a CD-RW is read at a variable transfer rate, ranging from 6X at the innermost track to 14X at the outermost track. The average data transfer rate is 10X (1500 kbytes/s). Data on a CD-R/CD-ROM is read at a variable transfer rate, ranging from 8X at the innermost track to 20X at the outermost track. The average data transfer rate is 14X (2100 kbytes/s). Data on a CD-RW/CD-R is written at a constant transfer rate of 2X or 4X, depending on the speed and media type you select.