Install guide

Writing Methods

Disc-at-Once (DAO)

This method is used to write all data onto a disc in one operation. It writes

multiple pieces of data without placing a space between data, starting with the

innermost track of the disc. Once data is written by this method, no data can be

added to the same disc even if there is free space available on the disc. This

method is useful for making a backup copy of an entire CD or DVD.

9. APPENDIX

Technical Notes

Buffer Underrun Protection Function

DVD drives are equipped with a buffer memory that temporarily stores data that

is being transferred. When the buffer memory becomes empty due to a delay of

data transfer for any reason, a writing error happens. Such a condition is defined

as a buffer underrun; such an error is defined as a buffer underrun error.

Buffer underrun protection is featured in this drive.

When a buffer underrun almost happens, buffer underrun protection temporarily

suspends the writing process. Writing resumes when enough data has

accumulated in the buffer memory. Buffer Underrun Protection in this

drive is extremely accurate, resulting in seamless recording before and after

suspension.

Test Writing

Test writing is a function to check for the possible occurance of buffer underrun

in your computer environment. The included CD/DVD writing software operates

the test writing function that cannot operate when buffer underrun protection is

activated (default). The buffer underrun protection should be first be deactivated

to use test writing.

DMA

Direct Memory Access(DMA), is support that allows data transfer between the

drives and memory without using the CPU. Both the drives and IDE controller in

the machine on the motherboard must include support for DMA. Also, you must

manually enable the operating system to support DMA, this is done in the System

section in the Control Panel where the drive settings are.