Rewritable Media

Quality of DVD-RW disc burning by LG GSA-4163B at 2x speed

 

The burn/read graphs have a clear and smooth shape, betraying no troubles during these operations. The quality of the resulting disc is highest, too. The PI error rate is very low, while the average PI failure rate is about 2, which is acceptable. It’s the more acceptable since we deal with a rewritable medium where quality is harder to achieve than with write-once formats.

Beta/Jitter and TA Test (Inner, Middle, Outer)
for the disc burned by the LG GSA-4163B
 
 

The asymmetry varies but little – the beta value is zero in the first half of the disc. The jitter rate is normal and uniform along the entire medium, indicating a good quality of the disc. TA Test agrees with that: the adjacent lengths overlap but little, so the jitter is low. The overall result is reduced due to the rather average Peak Shift, i.e. the average pit/land lengths deviate from the required ones. The drive makes them a little shorter than the standard demands.