>From [EMAIL PROTECTED] Wed May 15 16:18:30 2002
>On Wed, May 15, 2002 at 01:23:41AM +0200, Andy Polyakov wrote:
>> specification says that LBA 0 is expected to be found at 24mm! Similar
>> low level format? DVD+RW is more similar to DVD-ROM than DVD-R[W].
>> [Current] DVD+RW format differs with just few bits [which most players
>> ignore anyway], while DVD-R[W] has distinct "Linking data" structure
>> which is essential for playback. Meaning that DVD player *has to* have
>> *explicit* support for DVD-R[W] while it (explicit support) is *not*
>> required for DVD+R[W] playback, players should just play it.
>> Unfortunately not all do, but still DVD+R[W] compatibility is *mainly* a
>> matter of media reflectivity and drive calibration and *not* low level
>> format (I mean among those DVD-ROM players that fail to play DVD+R only
>> a small portion is actually confused by those different bits).
>Bizarre how in real world tests DVD-R works on most DVD players and
>DVD+RW does not. DVD-RW of course doesn't work on most DVD players
>either. Neither did CD-RW on CD-ROM drives for many years.
One reason for the DVD+RW incompatibility (according to Ricoh) is the fact
that they start at 24mm instead of 30 mm.
According to Pioneer all DVD-ROM drives that support multi layer DVD-ROM
(e.g. DVD9) should read DVD-RW because the reflectivity of DVD-REW is higher
than reflectivity of the upport DVd-ROM layer.
J�rg
EMail:[EMAIL PROTECTED] (home) J�rg Schilling D-13353 Berlin
[EMAIL PROTECTED] (uni) If you don't have iso-8859-1
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URL: http://www.fokus.gmd.de/usr/schilling ftp://ftp.fokus.gmd.de/pub/unix
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