What is the function of the buffer in a CD-R/CD-RW drive ?
CD-R/RW drives record data on a disc at CLV (Constant Linear Velocity). Once the drive starts recording, the host computer should send the data to the CD-R/RW drive faster than the disc recording Example: In case of a 12x speed recording, the expected data rate is 2352 X 75 X 12 = Approximately 2Mbytes, because 1 block is 2352bytes and 1 second is 75 blocks. The data transfer speed of the personal computer is not stable, because of the change of PC’s job-load. Therefore, the CD-R/RW drive first stores the data from the PC into the memory. This memory is called buffer (D-RAM). This buffer adjusts the time difference between the CLV recording data on a disc and the unstable data from the PC.
