Yamaha CD Recordable/Rewritable Drive CRW2200S - Manual (Page 11)

Introduction
3
*1 16X- or 20X-speed writing is enabled with the Partial CAV method. ( → P. 6)
*2 10X-speed writing/rewriting is enabled with the CLV method, and the 4X-10X Full CAV method. ( → P. 7)
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 write 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.
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... enough data has accumulated in
buffer memory...
writing is suspended writing continues