Zelfgebrande DVD+R's compatibeler dan DVD+RW's

What does plus in DVD+RW/+R stand for? Originally this paragraph started as following:

The key feature of DVD+RW/+R media is high [spatial] frequency wobbled [pre-]groove with addressing information modulated into it. This makes it possible to resume interrupted [or deliberately suspended] burning process with accuracy high enough for DVD[-ROM] player not to "notice" anything at playback time. Recovery from buffer underrun condition in DVD-RW/-R case in turn is way less accurate procedure, and the problem is that the provided accuracy is very much what average player can tolerate. Now given that both provided and tolerated inaccuracies are proportional to respectively writing and reading velocities there basically no guarantee that DVD-RW/-R recording that suffered from buffer underrun will be universally playable.

Well, it turned out that I was wrong about one thing. I failed to recognize that DVD-R[W] groove does provide for adequately accurate recovery from buffer underrun condition/lossless linking, equally accurate as DVD+RW. However! You apparently have to choose between buffer underrun protection and full DVD-ROM/-Video compatibility(*). The catch is that the latter is achieved only in Disk-at- once Recording mode which requires: a. prior knowledge of data-set size, b. uninterrupted data-stream [buffer underruns are not tolerated]. While the former is defined only in Incremental Recording mode which implies explicit support by player unit(**). DVD+RW/ +R are free from this limitation and combine both DVD-ROM/-Video compatibility and unconditional buffer underrun protection/ lossless linking.

As already mentioned, DVD+RW(***) pre-groove has "addressing information modulated into it." This gives you an advantage of writing in truly arbitrary order, even to virgin surface and practically instantly (after ~40 seconds long initial format procedure). In addition DVD+RW can be conveniently [over-]written with 2KB granularity(****). DVD-RW in turn can only be overwritten in arbitrary order. Meaning that it either has to be completely formatted first (which takes over 1/2 hour), or initially written to in a sequential manner. And it should also be noted that arbitrary overwrite is never an option if DVD-RW media was recorded in compatible Disc-at-once mode, whole disc blanking is.

Sometimes DVD+RW/+R recording strategy is referred to as packet writing. I myself am reluctant to call it so (or TAO/SAO/DAO) for the following reason. Despite the fact that DVD-R[W] provides for lossless linking (within the packet only?), packets are still denoted with certain linking information which distinguishes it (recording mode in question) from e.g. Disk-at-once. Now the point is that written DVD+RW/+R media, rather its Data Zone, does not contain any linking information and is logically indistinguishable from one written in DVD-R[W] Disc-at-once mode (or DVD-ROM for that matter).