Yamaha CRW-70 Buffer Underrun defined, Yamaha Buffer Underrun Protection

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.”

Data

If data transfer is

interrupted...

Data is stored in	then the buffer	When no data is
the buffer	memory begins	left in the buffer
memory...	to empty	memory... (Buffer
		Underrun)
and then written		writing fails (Buffer
to the disc		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.

If data transfer is	Once data transfer
interrupted...	resumes normally...
and the buffer	and enough data has
memory is about	accumulated in the
to empty...	buffer memory...
writing is	writing
suspended	resumes

Yamaha Buffer Underrun Protection ensures error-free results.

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