Yamaha CRW2200UX User Manual
Page 11
Introduction
3
Buffer Underrun Defined
CD-R/RW drives are equipped with buffer memory. This memory temporarily
stores data while a disc is being recorded. When buffer memory becomes empty
(due to unexpected interruptions or the system’s inability to keep up with the
writing process), a writing error occurs. This error is known as a “buffer
underrun error.”
A Buffer Underrun Error will permanently ruin the disc.
Yamaha Buffer Underrun Protection
Buffer Underrun Protection is featured in Yamaha’s CRW2200 series CD-R/
RW drives. When a buffer underrun is about to occur, a buffer underrun error is
prevented by temporarily suspending the writing process. Writing resumes when
enough data has accumulated again in buffer memory. Buffer Underrun
Protection on the CRW2200 series is extremely accurate, resulting in seamless
recording between stop and continuation points.
Yamaha Buffer Underrun Protection ensures error-free results.
Test-writing for Buffer Underrun
Test writing is a function to check for the likely occurrence of Buffer Underrun on your
computer system.
Most writing software includes test writing functions for this purpose.
When the Buffer Underrun Protection is set to ON (Default), test writing cannot be selected
on your writing software.
To use test writing, the Buffer Underrun Protection should be set to OFF.
➀
➁
➂
Data
If data transfer is
interrupted...
Data is stored in
buffer memory...
then buffer memory
begins to empty
When no data is left
in buffer memory...
(Buffer Underrun)
and then written
to disc
writing fails
(Buffer Underrun
Error)
➀
➁
If data transfer is
interrupted...
Once data transfer
resumes normally...
and buffer memory is
about to empty...
and enough data has accumulated
in buffer memory...
writing is suspended
writing resumes