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1.6 Buffer Underrun Proof Technology
Storage media, like CD-Rs, sometimes get damaged during the recording process, due to a phenomenon called
a
buffer underrun.
To solve this problem, Plextor has fitted the PX-708A with a
Buffer Underrun Proof
Technology
.
Buffer Underrun Errors
During CD/DVD recording, a constant flow of data should be sent from the computer to the recording device and
the transfer rate should match the recording speed of the CD/DVD. However, as most operating systems are not
designed for real-time processing of large amounts of data, the data flow speed is often unstable.
To overcome this problem, the recording device temporarily stores the transferred data in a buffer and sends them
to the CD/DVD at a constant speed.
However, this solution only works as long as the buffer does not run out of data. If this happens, the recording
process is halted at a random point, resulting in errors on the CD/DVD that will probably render it unusable. This
type of error is called
a buffer underrun error
.
Buffer Underrun Proof Technology
The PX-708A is equipped with a Buffer Underrun Proof Technology protecting storage media against this type of
error.
The PX-708A continuously checks the status of the data buffer. As soon as a risk of a
buffer underrun
is detected,
the recording process is suspended at a suitable point. The drive continues prompting the computer for data, in
order to refill the data buffer. As soon as the buffer’s situation returns to normal, the drive restarts the recording
process. The new data is correctly appended to the data already present on the CD/DVD.
1.7 PoweRec
Low quality media (CDs and DVDs) are very often the source of disc errors during high-speed recording. The
PoweRec technology checks the quality of the media and automatically selects the optimum (maximum) writing
speed, giving the highest quality result.
To obtain maximum writing speed, you can disable the PoweRec option using the software that is supplied with the
PX-708A.
