WOPC

Using WOPC.

Whilst capacity & speed grow, DVD writing has become a enhanced science. Laser power rate is one of the factors to impact on writing quality. During the days of CDRW, fixed laser power was enough as speed was relatively low. But with DVDRW, a DVDReWriter should be able to adjust writing power acording to writing speed & disc condition. This is what WOPC (Walking Optimal Power Control) is for.
N.B. Don't get confused here re: Speed. We are looking at writing speed (amount of data written) & not rotational speed.



During power adjusment, the writer actually pauses for some nano-seconds. So there are 2 scenarios where WOPC can be disabled (writing quality may suffer, so be wary).
1. With top notch, defect free media. WOPC can be disabled with reduced burning time the main benifit.
2. With low speed <4x or poor quality DVD-R media, WOPC can be disabled to increase the likelihood of a successful burn. This is due to the writer bring less likely to lose track of address due to the pausing for a few nano-seconds to adjust laser power.
After WOPC is disabled, setting remains until PC is rebooted. Unless user re-enables it in the meantime. It can be advisable to check WOPC setting before burning any other discs.