Nero CD-DVD Speed: Disc Quality Test with Different Media
I took several DVD discs to check how well the LG GSA-4167B drive could burn DVD media. The discs were all recorded with Nero Burning Rom at the maximum possible speeds they were rated for by their manufacturers. The quality check was then performed in a Lite-On SOHW-1653S drive (firmware CS09) at 4x speed since the tested drive from LG could not work with the appropriate option of Nero CD-DVD Speed.
As for the disc quality criteria, the ECMA standards for DVD-R/RW and DVD+R/RW media say that the total number of PI errors in 8 subsequent ECC blocks should not exceed 280. This is the first limiting value I will base my judgments upon. Then, an ECC block must not contain more than four irrecoverable PI errors (an irrecoverable PI error is referred to as PI failure by the CD-DVD Speed utility).
DVD discs that have no more than 280 PI errors per eight ECC blocks and 4 PI failures per one ECC block should be considered acceptable-quality media. Besides these criteria, you should also note how the errors are distributed along the surface of the disc. Of course, it is the worst situation when the errors exceed the acceptable limits on the entire surface. Single and short-time spikes of errors are less dangerous.
Digitex DVD+R 8x
I begin to check the quality of the discs recorded in the LG GSA-4167B from DVD+R media. The quality of the Digitex disc (represented by the screenshot above) is beyond my criticism. The maximums of errors of both types are very low and the errors are also evenly distributed along the surface of the disc. The total number of errors is small, too.
RIDATA DVD+R 16x
It’s not all clear with the RIDATA disc. The generally good picture is blemished by the PI Errors graph. The diagram shows that the ECMA norms are violated at one place of the disc, but the quality of the rest of the disc surface is quite acceptable.
TDK DVD+R 16x
The screenshot with the quality check results for the TDK disc represent a situation similar to the previous test. Again, the quality of the disc is generally high, but there is a single spot where the allowable maximum of PI Failures is exceeded.
Verbatim DVD+R 16x
The Verbatim disc is recorded just excellently. The maximums of errors of both types are very low; the total number of errors is small, too. The drive and the blank disc seem to match each other perfectly.