|Up to version 5.12 the support was classified as "experimental," because it was based solely on user feedback. In time for 5.13 release LinuxFund.org has donated DVD-dash capable unit, which permits me to perform pre-release tests on site and thus renders the "experimental" status obsolete:-)|
|Q.||How are dvd+rw-tools different from cdrecord-ProDVD? When it comes to DVD-R[W] burning that is...|
|A.||DVD-R[W] specification defines following recording strategies:
Now, cdrecord-ProDVD supports Disk-at-once strategy only, while dvd+rw-tools all the others. That's it:-)
Well, the above list is not actually complete, as newly
|Q.||What is the difference between these recording strategies? Which one is the one for me?|
Disk-at-once is the one claimed to guarantee full compatibility with DVD-ROM/-Video. But apparently only as long as recording didn't suffer from buffer underruns (see this paragraph on +RW page for technical details). DAO recordings are unappendable. Oh! It should be explicitly noted that "full compatibility with DVD-Video" doesn't really mean that DVD-RW media recorded in this mode will be universally playable! DVD-RW reportedly suffers from compatibility issues very similar to DVD+RW. In other words these incompatibilities, both -RW and +RW, have way more to do with low reflectivity of these media, than with their logical formats.
As for Incremental strategy [allegedly
Restricted Overwrite (
Disk-at-once and Incremental recording
strategies are applicabe to
|Q.||How do I switch between DVD-RW modes?|
To change [back] to Sequential mode [or to
reuse the media in Sequential mode for a new dataset] invoke
|Q.||How do I burn?|
For practical burning instructions see the growisofs paragraph on +RW page.
|Q.||Any [other] caveats?|
My personal initial experience with
support page: "... some of discs on the market do not
meet the recognized quality and performance standards."
Question is how does it show? Apparently in bizarre ways...
In order to facilitate for the latter test
and be excused from wasting an hour on full blanking procedure,
growisofs version 5.6 implements rudimentary support for
As of version 5.6 growisofs no longer relies on logical unit to do all the magic, but explicitly asks the burner to perform OPC, Optimal Power Calibration, prior recording. It seems that it's not necessarily a "good thing™," as it's maintained that media profiles pre-defined in unit firmware might be more optimal than those obtained as result of auto-calibration. I explicitly check if the unit returns any OPC descriptors in reply to READ DISC INFORMATION command [assuming that if it does, then pre-defined media profile is in effect], but it wasn't actually observed to be a case so far. If anybody can elaborate on this further, I appreciate a note...