Optorite DD0401 dual DVD±RW recorder - Page 12

HD BURN FUNCTION

As with Optorite's first DVD recorder, namely the DD0203, the new DD0401 offers the HD-Burn function. HD-BURN allows writing twice the amount of data than can normally fit on a CD-R disc. This means that up to 1.4GB of data can be recorded on 700MB CD-R media. While the feature is currently supported only on DVD recorders, it only applies to CD-R writing.

HD-BURN is supported by Nero Burning Rom from Ahead and bundled with the Optorite DD0401 retail package. Using HD-BURN, the user is able to create one of "CD-ROM" (ISO, UDF, ISO/UDF, Bootable), HD-BURN -Video or just copy an HD-BURN disc.

HD-BURN Writing

We used the Nero HD-Burn writing method to compile a new CD-ROM ISO. We inserted a 700MB CD-R disc and created a new project requiring 1.358GB capacity. Below you can see the relevant media information reported by Nero Burning Rom:

Burning using HD-BURN is allowed at the maximum speed of 24X.

Writing is only allowed with the "Disc at Once mode" set, so the "Finalize" selection is always enabled. In addition, writing simulation is not supported. Burn Proof was applied in our case when using HD-BURN writing mode:

The duration of the writing process at 24x was 7:45min:

We also created a 1.085GB CD-ROM ISO file and burnt it with Nero Burning Rom at 24x. Recording was successfully finished in 6:03min:

The Optorite DD0401 drive cannot write 90min or 99min CD-R media using the HD-BURN function.

Reading the HD-BURN discs

The produced HD-BURN ISO discs were completely readable with the Optorite DD0203 and Optorite DD0401 drives. However, the discs could not be recognized or read by any other drive we tested. This is also confirmed by Sanyo, declaring that the discs are not readable by drives or players currently available in the market.

In the following screenshots you can see the Nero CDSpeed transfer graphs for the recorded discs:

Nero CDSpeed recognized the discs as DVD-R media, due to the increased amount of data stored. The drive read both discs in a similar way, starting at 3.82x and finishing at 8x, approximately. The reported seek times were also very low.

An interesting observation of the CDSpeed graphs is that although the transfer rate line (yellow) refers to CAV reading, the rotation speed of the disc did not remain constant throughout the whole reading process. The drive seems to accelerate towards the outer tracks of the discs, in an effort to maintain synchronization and reading accuracy.

Writing Quality scans

We measured the PI/UncPI errors on the HD-BURN discs. The scans for the 1GB and 1.4GB discs are shown below: