DVD Drives and multisession DVD's

On Fri, 29 Sep 2006 10:08:44 +1200, Jack Hammond
wrote:



Are there and DVD Writers that fully support multisession, with say DVD+ RW/DVD+R Writing..?

From what I have read it not supported in the DVD reading specs..

Thanks

I own virtually every brand available in Australia and they are all
multisession. Been that way for some years. Most of these drives come
with Nero which you can set for no multisession or multisession for
DATA.

SalesMart.com.au
Perth, Western Australia
http://www.salesmart.com.au
*******************************************
Email Contact info on the above site.
*******************************************

I am Referring to DVD Not CDR...
All the references I have read is it is not possible..

I'm afraid you read the wrong stuff then.
It's perfectly possible on DVD+R, DVD-R and DVD-RW
NOT on DVD+RW
But on DVD-RW it's typically not done either by the applications.
Nero however stores data such on single session DVD+RW and DVD-RW that Nero
itself can still distinguish multiple "virtual" sessions inside the one
physical session.
P.S. IsoBuster sees the individual "virtual" sessions as well.

But maybe you're referring to the limitation of Windows that doesn't bother
to check the later (physical) sessions on DVD so that you appear to have
lost your latest appended data ? Now I completely forgot if Windows XP can
already cope with it or not ... should check ??

Finally I probably should also mention that multi-sessions are not used in
case of Video DVDs.

"Peter" wrote in
message ...
I am Referring to DVD Not CDR...
All the references I have read is it is not possible..

I'm afraid you read the wrong stuff then.
It's perfectly possible on DVD+R, DVD-R and DVD-RW
NOT on DVD+RW
I have done multi session dozens of times with Verbatim DVD+RW, LiteOn drive
and Nero.
My DVD player and PC happily play the Mpegs back from all sessions. (data
disc)
The stand alone DVD recorder reopens the session on a +RW and adds to it so
it is always single session.

Yes I just went and double checked with IsoBuster.

.. --------------------------------------
Mike Richter, were you born with
"Scam Artist" emblazoned on your face?
--------------------------------------

wrote:
(SalesMart.com.au) wrote:
Jack Hammond wrote:

Are there and DVD Writers that fully support multisession,
with say DVD+ RW/DVD+R Writing..?
From what I have read it not supported in the DVD reading specs..

I own virtually every brand available in Australia and they are all
multisession. Been that way for some years. Most of these drives come
with Nero which you can set for no multisession or multisession for
DATA.

I am Referring to DVD Not CDR...
All the references I have read is it is not possible..

Like these?

================================================== =======
Mike Richter's Cockamamie Mumbo Jumbo on DVD Multisession
================================================== =======

======================
From: Mike Richter (cRoxio ****)
Date: 6/30/04
Subject: Adding Data to 4.7GB disc

I am trying to add data for backup purpose to DVD disc 4.7GB.
Session 1 goes well to recod data. Any session added after
session 1 is not viewable or visible in explorer or shell.
My software is Easy Cd Creator 5 basic.

My experience with DVD-ROM is limited (and I've not used ECDC for
the job), but I have never seen an option to add sessions to the
format.

The only supported DVD-ROM format I have seen is DAO.

My guess is that ECDC 5 is incorrect in offering the option

======================
From: Mike Richter (The Slimiest Lying Friggin SOB)
Date: 8/10/04

DVD-ROM is normally and I believe exclusively written DAO,
hence only single-session.

======================
From: Mike Richter (cRoxio ****)
Date: 9/8/04
Subject: Multisession DVD+RW problems

Softwa Easy CD and DVD Creator 6 Creator Classic
I am trying to create a multisession data DVD+RW in either ISO
or Joliet file format, so that I can add data files to it later.

This forces the DVD+RW to be a single session disc,
and I can't add any more files to it.

I've not found any standard for multisession DVD-ROM
in ISO 9660 style.

======================
From: Mike Richter (cRoxio ****)
Date: 10/5/04

In my limited experience, multisession on ISO 9660 DVD-ROM is
unsupported, poorly supported or inconsistent in both writers
and software.
======================

-------------------------------
Wow! What a slimy friggin SOB!
----------------------------------------------
Mikey, you are The Slimiest Lying Friggin SOB!
----------------------------------------------
Mike Richter, were you born with
"Scam Artist" emblazoned on your face?
--------------------------------------
(Mike Richter, any Material Connection w/ Roxio?)

On Sat, 30 Sep 2006 23:09:38 GMT, "Peter"
wrote:

I am Referring to DVD Not CDR...
All the references I have read is it is not possible..

I'm afraid you read the wrong stuff then.
It's perfectly possible on DVD+R, DVD-R and DVD-RW
NOT on DVD+RW

Really ?

I've done it many times with +rw and -rw.
Program used, Nero 6.6

But on DVD-RW it's typically not done either by the applications.
Nero however stores data such on single session DVD+RW and DVD-RW that Nero
itself can still distinguish multiple "virtual" sessions inside the one
physical session.
P.S. IsoBuster sees the individual "virtual" sessions as well.

But maybe you're referring to the limitation of Windows that doesn't bother
to check the later (physical) sessions on DVD so that you appear to have
lost your latest appended data ? Now I completely forgot if Windows XP can
already cope with it or not ... should check ??

Finally I probably should also mention that multi-sessions are not used in
case of Video DVDs.

.. --------------------------------------
Mike Richter, were you born with
"Scam Artist" emblazoned on your face?
--------------------------------------

dean wrote:

I am Referring to DVD Not CDR...
All the references I have read is it is not possible..

I'm afraid you read the wrong stuff then.
It's perfectly possible on DVD+R, DVD-R and DVD-RW
NOT on DVD+RW

Really ?

I've done it many times with +rw and -rw.
Program used, Nero 6.6

Not if you have Easy CD-DVD Cremator:

================================================== =
Mike Richter is a LIAR (dvd multisession)(standard)
================================================== =

=========================================
From: Mike Richter (cRoxio ****)
Date: 9/8/04
Subject: Multisession DVD+RW problems

Softwa Easy CD and DVD Creator 6 Creator Classic
I am trying to create a multisession data DVD+RW in either ISO
or Joliet file format, so that I can add data files to it later.

When I start up Easy CD and DVD Creator 6 Creator Classic and
say New Data Project, then check Project Properties, this is
what I see:

-- "Record using a single data track only" is both selected and
grayed out so that it can't be unchecked.

-- Under "Physical format of disc", Mode 2: CDROM XA is also
grayed out so that it can't be selected.

This forces the DVD+RW to be a single session disc, and I can't
add any more files to it. Which is a shame, to waste a few gig!
So naturally I'm a little upset......

No - you can write UDF.

But check the specs; I've not found any standard
for multisession DVD-ROM in ISO 9660 style.

I've already asked Plextor tech support if they know of any
reason why I wouldn't be able to do this from a hardware or
media perspective. They say there is no reason.

Tell them [Plextor] to check the standard.
=========================================

Wow! No standard for multisession DVD-ROM !!
Wow! Mikey knows more than Plextor!

================================================== =
From: smh
Date: 9/9/04
Subject: Multisession DVD+RW problems

Plextor tech support tells me that they ARE able to add files in
the exact same situation. I asked them what software are you
using? They said EZCDDVD Creator Classic, just like me. I asked
what version? They replied 6.2.0.134 SP2. I have 6.1.1.7, which is
the latest update that Roxio has posted on their Web site.

So thank you, Roxio, for not posting updates to your bug filled
software.

Mike Richter (cRoxio ****):

"But check the specs; I've not found any standard
for multisession DVD-ROM in ISO 9660 style."

"Tell them [Plextor] to check the standard."
================================================== ====
..

----------------------------------------------
Mikey, you are The Slimiest Lying Friggin SOB!
----------------------------------------------
Mike Richter, were you born with
"Scam Artist" emblazoned on your face?
--------------------------------------
(Mike Richter, any Material Connection w/ Roxio?)

I have done multi session dozens of times with Verbatim DVD+RW, LiteOn
drive
and Nero.

No. DVD+RW only supports one track in one session, no exceptions possible.
That's the format spec.
I know it appears to be multi-session, but it is not.
Please understand that I'm talking from a media format perspective !
I understand that if you have the ability to append data it may seem as if
you're writing multi-session, session in the sense of another writing
session, but on the disc it is still the same physical session.

Nero simply over-writes the file-system in the beginning of the track and
appends the new data at the back.
And because it does it like this, and because it keeps track of the older
(overwritten) file-systems somewhere else as well on the disc, it can make
it appear as if you have multiple sessions on the disc. PS. That's what
IsoBuster does as well. But purely from a format perspective there is only
one physical session on the disc.
IsoBuster will show you only one track in one session but will show you many
file-systems in that track (for all writing sessions, aka virtual sessions).

I've done it many times with +rw and -rw.
Program used, Nero 6.6

Yes, I know.
Pls. read my comment made to Derek's post.

PS. 2 more comments I forgot to make:

1.
My DVD player and PC happily play the Mpegs back from all sessions.

Correct, because in reality there is only one track in one session.
The file-system interpreters (software/firmware) don't need to worry about
higher sessions.
There is a file-system in the first session, where it is supposed to be and
it points to the latest appended data (which possibly/likely incorporates
links to all the previously written data as well.).

2.
Actually I already mentioned this before but to avoid confusion.
While DVD-RW *does* support writing multiple sessions (in the physical
sense, unlike DVD+RW, like is done on DVD-R (and DVD+R)) the writing model
used is actually the same as what I explained for DVD+RW. Namely only one
physical session ! But the data inside this one session is organised such
that software can make it appear as if there are multiple sessions inside.

Peter wrote:
I've done it many times with +rw and -rw.
Program used, Nero 6.6

Yes, I know.
Pls. read my comment made to Derek's post.


Well I just took a dvd+rw that had a bunch of data written on it and
added a test file. Fine in windows explorer. I checked with iso buster
and sure enough I only see one session. Never seen anything like this
before (never looked either). Peter is absolutely correct, give him an
A, it's nice to read a post in which someone actually knows what he's
talking about. My software is Sonic Record Now, at least that's what
came with the burner, not sure who the hell might own the stuff these days.
Dave Cohen