Yamaha CD Recordable/Rewritable Drive CRW-70 - Manual (Page 16)

7
Buffer Underrun defined
CD-R/RW drives are equipped with a buffer memory. This memory
temporarily stores data while a disc is being recorded. When the 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 the CRW-70 drive 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 the buffer
memory. Buffer Underrun Protection on the CRW-70 drive is
extremely accurate, resulting in seamless recording between stop and
continuation points.
Yamaha Buffer Underrun Protection ensures error-free results.
Data
Data is stored in
the buffer
memory... then the buffer
memory begins
to empty When no data is
left in the buffer
memory... (Buffer
Underrun)
and then written
to the disc writing fails (Buffer
Underrun Error)
If data transfer is
interrupted...
If data transfer is
interrupted... Once data transfer
resumes normally...
and the buffer
memory is about
to empty... and enough data has
accumulated in the
buffer memory...
writing is
suspended writing
resumes