> > > > > (And the other limitations make incremental writing
> > > > > through the OS cumbersome except for DVD-RAM)
> > > >
> > > > Hmm, formatted DVD+RW media also has no such
> > > > restrictions, you can read/write individual 2048 byte blocks,
> > > > just like DVD-RAM.
> > >
> > > This is not true.
> > >
> > > DVD+RW has more restrictions than a formatted CD-RW or DVD-RW
> >
> > Can you give me a hint what kind of restrictions there are for DVD+RW
> > media, which I missed so far (and that are worse than CD-RW or DVD-RW) ?
> >
> > Or are you confusing it with the restrictions that exist for DVD-RW media
> > that is
> > formated into "restricted overwrite" mode?
>
> NO, but you need to flush the cache
SYNCHRONIZE CACHE is already present in sdclose(), when
un_f_dvdram_writable_device == TRUE. For DVD+RW we could
do the same.
> and update the TOC before you are allowed
> to open the tray after you did write to the device.
The MMC-5 standard says that there is exactly one logical track on
a DVD+RW media (READ TRACK INFORMATION command):
»6.33.3.16.6 DVD+RW Track Size
A DVD+RW disc has exactly one logical track, track 1.
The logical track size is calculated using information collected from the disc
ADIP:
Logical Track Size = End Physical Sector Number of Data Area
- Starting Physical Sector Number of Data Area + 1.«
Again, this is exactly the same as DVD-RAM.
The READ TOC command for DVD+RW is supposed to return a
"fabricated toc" with track 1 starting at LBA 0, and a 0xAA leadout
starting at the capacity of the media.
See the cdrw -M output in my previous message: it reports a track 1 capacity
of 2295104 sectors = 4.7 GB.
This message posted from opensolaris.org
_______________________________________________
opensolaris-discuss mailing list
[email protected]
