On Fri, 2004-09-10 at 10:25, Levi Bard wrote:
> I write an isofs directly to the block device.
That's packet writing.
> I've used dvd+rw, dvd+r, dvd-rw, dvd-r,
On a Sony/Philips (DVD+RW) _firmware_ drive?
Or a DVD Consortium (Pioneer/Panasonic DVD-RW/RAM) _firmware_ drive?
DVD+RW and DVD Consortium firmwares are _radically_different_.
The last time I tried DVD+RW-Tools, it didn't support the latter.
> and the results are visible to dvd drives and hardware dvd players.
On newer consumer devices, yes.
- DVD-R(A) is near-100%
- DVD-R(G) is near-100%, _except_ on 1st generation DVD-ROM/players
- DVD-RW and DVD+RW are around 70%, well supported on newer devices
- DVD+R** is around 80%, well supported on newer devices, some older
- DVD-RAM is well under 10%, limited to Toshiba/Hitachi/etc...
(DVD-RAM firmware/laser adopters)
**NOTE: Because DVD+R, like any MO, uses a pie-sector approach, instead
of a single track like any WORM, I have had some 1st and even 2nd
generation DVD-ROM/players get _damaged_ if they use a DVD+R disc. My
notebook right here, 1st generation combo DVD-ROM/CD-RW drive, was one
such victim.
You have to be careful with DVD+R, or _any_ CAV (constant angular
velocity) _writing_ MO technology. This includes using CLV CD-RW media
in a CAV CD-RW drive (which can also reduce the drive's lifetime).
Only MO has this issue, because it is pie-slice. WORM is a single, long
track, so there is no such issue with CAV v. CLV writing.
> The tools were originally written for +r[w] only, but support was soon
> added for -r[w], and has been there for a while.
Media yes. But is it still _only_ Sony/Philips firmware?
--
Linux Enthusiasts call me anti-Linux.
Windows Enthusisats call me anti-Microsoft.
They both must be correct because I have over a
decade of experience with both in mission critical
environments, resulting in a bigotry dedicated to
mitigating risk and focusing on technologies ...
not products or vendors
--------------------------------------------------
Bryan J. Smith, E.I. b.j.smith at ieee.org
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