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<TITLE>The Answer Guy 31: DAO software for linux? </TITLE>
</head>
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<H4>"Linux Gazette...<I>making Linux just a little more fun!</I>"
</H4>
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<H1 align="center"><A NAME="answer">
<img src="../gx/dennis/qbubble.gif" alt="" border="0" align="middle">
<a href="./lg_toc31.html">The Answer Guy</a>
<img src="../gx/dennis/bbubble.gif" alt="" border="0" align="middle">
</A></H1> <BR>
<H4 align="center">By James T. Dennis,
<a href="mailto:answerguy@ssc.com">answerguy@ssc.com</a><BR>
Starshine Technical Services,
<A HREF="http://www.starshine.org/">http://www.starshine.org/</A> </H4>
<p><hr></p>
<p>The beginning of this thread was published in Issue 30,
<a href="http://www.linuxgazette.com/issue30/tag_cdr.html">DAO
(Disk At Once) CDR? Stump Me!</a></p>
<p><hr width="40%"></p>
<H3><img src="../gx/dennis/qbub.gif" alt="(?)" width="50" height="28"
align="left" border="0">DAO software for linux? </H3>
<p><strong>From Mark Heath on Sat, 27 Jun 1998
<br><br>
On Thu, 25 Jun 1998, Jim Dennis wrote:
<br><br>
<font color="navy"><em>
Well, you have me stumped.
<br><br>
I don't know anything about the difference between DAO and
other forms of CDR recording. Normally, I'd spend an</em></font>
<br><br>
There are 3 different types of cd recording:
Track at once, Disk at once and session at once.
</strong></p>
<blockquote><img src="../gx/dennis/bbub.gif" alt="(!)" width="50" height="28"
align="left" border="0">
I figured it was probably something like that.
</blockquote>
<p><strong><img src="../gx/dennis/qbub.gif" alt="(?)" width="50" height="28"
align="left" border="0">
cdrecord, cdwrite and many others do Track at once.
<br><br>
Its where the software writes a track turns off the laser, turns it
back on then writes the next track, after all the tracks are done it
writes the leadin and lead out tracks.
</strong></p>
<blockquote><img src="../gx/dennis/bbub.gif" alt="(!)" width="50" height="28"
align="left" border="0">
I've always been curious about multi-session CD's and
how they maintain the directory/indices on them. But never
curious enough to look for the rainbow of books that define
the spec. --- more of a "layperson's armchair" curiousity
that would be satisfied with a five minute description and
a couple of diagrams.
</blockquote>
<p><strong><img src="../gx/dennis/qbub.gif" alt="(?)" width="50" height="28"
align="left" border="0">
With disk at once, the laser is turned on, the leadin is written,
then the first track, second track etc, then te lead out and then
the laser is turned off.
<br><br>
The has the advantage of being able to master music disks which have
no pauses in between the tracks, which is manditory for TAO.
</strong></p>
<blockquote><img src="../gx/dennis/bbub.gif" alt="(!)" width="50" height="28"
align="left" border="0">
I think you mean "which is an avoidable result when using
TAO." It's just a semantic nitpick --- but I had to read
this statement several times to guess what you (probably)
meant.
</blockquote>
<p><strong><img src="../gx/dennis/qbub.gif" alt="(?)" width="50" height="28"
align="left" border="0">
Session at once is basically multi session DAO.
</strong></p>
<blockquote><img src="../gx/dennis/bbub.gif" alt="(!)" width="50" height="28"
align="left" border="0">
Huh? I am also a bit foggy on multi-session CD's ---
but I'd thought that the sessions on multi-session CD's
were supposed to be on track boundaries. Are you saying
there's a multi-session per track option?
</blockquote>
<p><strong><img src="../gx/dennis/qbub.gif" alt="(?)" width="50" height="28"
align="left" border="0">
<font color="navy"><em>
hour or two hunting around on Alta Vista, Yahoo!, Savvy
Search, DejaNews, etc and pulling out more of my hair to
find out. However, I have a book to write and a wife to
feed, and it is just too close to my deadline for me to
wait until tomorrow.
<br><br>
So, what is DAO and why would you need it? What is the
difference between cdrecord and cdwrite (the one I use
with my Ricoh CDR)? Have you tried them both? What is
MMC? Who is Jeff Arnold? Who are HyCD and should we
</em></font>
<br><br>
cdrecord is the replacement for cdwrite, Jorg Schilly supports every
unix platform that can have a cdr plugged into.
<br><br>
MMC is the latest multi media specification for CDRs so that all
drives have the same command set for recording.
</strong></p>
<blockquote><img src="../gx/dennis/bbub.gif" alt="(!)" width="50" height="28"
align="left" border="0">
I did guess that MMC stood for "multi-media CD" or
"multi-media CDR." I take it that MMC doesn't define
a standard for DAO mode recording? (Or were you simply
saying that your HP SureStore CDR doesn't support the
MMC CDR spec?).
</blockquote>
<p><strong><img src="../gx/dennis/qbub.gif" alt="(?)" width="50" height="28"
align="left" border="0">
Jeff Arnold is synonimous (sp?) with DAO software he wrote the First
and most widely used DAO software for DOS. Its a pity that he won't
support Unix because his tools are very unix like.
</strong></p>
<blockquote><img src="../gx/dennis/bbub.gif" alt="(!)" width="50" height="28"
align="left" border="0">
Maybe he could be bribed. Does he distribute his package
as shareware? Would he be willing to license the code
and let someone else do the port?
</blockquote>
<p><strong><img src="../gx/dennis/qbub.gif" alt="(?)" width="50" height="28"
align="left" border="0">
HyCD are who alta vista turned up when I did A search for +unix +cdr
+software. They support mixed mode disk duplication, which why I
thought it did DAO. Unfortunately it does not.
</strong></p>
<blockquote><img src="../gx/dennis/bbub.gif" alt="(!)" width="50" height="28"
align="left" border="0">
I'm afraid to ask.... what is the difference between
"mixed mode" and DAO? Is it that HyCD can duplicate CD's
that have mixed data and audio (etc?), and/or that it can
read tracks that were laid down in TAO and DAO (and other?)
modes but it must write them in TAO?
</blockquote>
<p><strong><img src="../gx/dennis/qbub.gif" alt="(?)" width="50" height="28"
align="left" border="0">
I was trying to eliminate a need for my Windows box but things keep
popping onto it.
<br><br>
I use it for 3 things:
<ol>
<li>Audio manipulation. I'm waiting for a good tool (Atech is being
developed) to do this under Linux ala Cooledit (not to be confused
with the Linux text editor)
<li>DAO writing.
<li>Epson Stylus colour printing. Ghostscript just doesn't match the
quality.
</ol>
</strong></p>
<blockquote><img src="../gx/dennis/bbub.gif" alt="(!)" width="50" height="28"
align="left" border="0">
Well, hopefully this will inspire someone out there to
"raise the bar" and help you purge Windows from your system
at long last.
</blockquote>
<p><strong><img src="../gx/dennis/qbub.gif" alt="(?)" width="50" height="28"
align="left" border="0">
I did use it for Playstation development but now I have the tools for Linux.
<br><br>
Thank you very much for your help.
<br>Mark.
</strong></p>
<blockquote><img src="../gx/dennis/bbub.gif" alt="(!)" width="50" height="28"
align="left" border="0">
Well, I obviously wasn't much help --- but we'll see if
our readership will give us a scoop...
</blockquote>
<p><hr width="40%"></p>
<H3><img src="../gx/dennis/qbub.gif" alt="(?)" width="50" height="28"
align="left" border="0">Mark Heath fills us in...</H3>
<p><strong>From <em>The Answer Guy</em> on Mon, 29 Jun 1998
<br><br>
On Sat, 27 Jun 1998, Jim Dennis wrote:
<br><br>
<font color="navy"><em>
Its where the software writes a track turns off the laser, turns it
back on then writes the next track, after all the tracks are done it
writes the leadin and lead out tracks.</em></font>
<br><br>
I've always been curious about multi-session CD's and
how they maintain the directory/indices on them. But never
curious enough to look for the rainbow of books that define
the spec. --- more of a "layperson's armchair" curiousity
that would be satisfied with a five minute description and
a couple of diagrams.
</strong></p>
<blockquote><img src="../gx/dennis/bbub.gif" alt="(!)" width="50" height="28"
align="left" border="0">
I've never successfully written a multisession CD either. I've made a
few open disks but never managed to import the previous session properly
so I didn't bother trying to continue writing to them. Just in case I
lost the first session.
</blockquote>
<p><strong><img src="../gx/dennis/qbub.gif" alt="(?)" width="50" height="28"
align="left" border="0">
<font color="navy"><em>Session at once is basically multi session DAO.</em></font>
<br><br>
Huh? I am also a bit foggy on multi-session CD's ---
but I'd thought that the sessions on multi-session CD's
were supposed to be on track boundaries. Are you saying
there's a multi-session per track option?
</strong></p>
<blockquote><img src="../gx/dennis/bbub.gif" alt="(!)" width="50" height="28"
align="left" border="0">
This is correct. For example you can write 3 tracks multisession using
DAO. Then come back later and write a few more tracks using DAO.
</blockquote>
<p><strong><img src="../gx/dennis/qbub.gif" alt="(?)" width="50" height="28"
align="left" border="0">
<font color="navy"><em>
MMC is the latest multi media specification for CDRs so that all
drives have the same command set for recording.</em></font>
<br><br>
I did guess that MMC stood for "multi-media CD" or
"multi-media CDR." I take it that MMC doesn't define
a standard for DAO mode recording? (Or were you simply
saying that your HP SureStore CDR doesn't support the
MMC CDR spec?).
</strong></p>
<blockquote><img src="../gx/dennis/bbub.gif" alt="(!)" width="50" height="28"
align="left" border="0">
The 4020i doesn't support MMC. Only new drives do (most of the IDE
CD-Rs do, and the CD-RW do)
</blockquote>
<p><strong><img src="../gx/dennis/qbub.gif" alt="(?)" width="50" height="28"
align="left" border="0">
<font color="navy"><em>
Jeff Arnold is synonimous (sp?) with DAO software he wrote the First
and most widely used DAO software for DOS. Its a pitty that he wont
support Unix because his tools are very unix like.</em></font>
<br><br>
Maybe he could be bribed. Does he distribute his package
as shareware? Would he be willing to license the code
</strong></p>
<dl><dt><img src="../gx/dennis/bbub.gif" alt="(!)" width="50" height="28"
align="left" border="0">
He does. The downloadable version is available at:
<dd><code><A HREF="http://www.goldenhawk.com/"
>http://www.goldenhawk.com/</A></code>
</dl>
<p><strong><img src="../gx/dennis/qbub.gif" alt="(?)" width="50" height="28"
align="left" border="0">
and let someone else do the port?
</strong></p>
<blockquote><img src="../gx/dennis/bbub.gif" alt="(!)" width="50" height="28"
align="left" border="0">
I'd really like that but I dont know how Jeff feels about Linux.
<br><br>
He seemed rather hostile when I asked about doing a linux port.
All his reply was: no.
</blockquote>
<p><strong><img src="../gx/dennis/qbub.gif" alt="(?)" width="50" height="28"
align="left" border="0">
<font color="navy"><em>
HyCD are who alta vista turned up when I did A search for
<tt>+unix +cdr +software</tt>. They support mixed mode disk
duplication, which why I thought it did DAO. Unfortunately it
does not.</em></font>
<br><br>
I'm afraid to ask.... what is the difference between
"mixed mode" and DAO? Is it that HyCD can duplicate CD's
that have mixed data and audio (etc?), and/or that it can
read tracks that were laid down in TAO and DAO (and other?)
modes but it must write them in TAO?
</strong></p>
<blockquote><img src="../gx/dennis/bbub.gif" alt="(!)" width="50" height="28"
align="left" border="0">
Mixed mode is simply multiple tracks with different data formats.
The most common is Computer games with 1 data track followed by several
Audio tracks, these can be written with TAO.
<br><br>
The main difference between DAO and TAO is that for DAO the laser is
never turned off during the recording. You can even do a single track in
DAO mode. The difference here is that DAO disks can be taken to CD
publishing company while TAO disks can not (due to gaps in the track
data, where the laser has been turned off)
</blockquote>
<p><strong><img src="../gx/dennis/qbub.gif" alt="(?)" width="50" height="28"
align="left" border="0">
Well, hopefully this will inspire someone out there to
"raise the bar" and help you purge Windows from your system
at long last.
</strong></p>
<blockquote><img src="../gx/dennis/bbub.gif" alt="(!)" width="50" height="28"
align="left" border="0">
Well I did this some time ago, purge windows. Then a piece of hardware
came out which was built into the motherboard so I built a new machine and
put both Linux and 95 on it.
<br><br>
My primary box is Linux only.
</blockquote>
<p><strong><img src="../gx/dennis/qbub.gif" alt="(?)" width="50" height="28"
align="left" border="0">
Well, I obviously wasn't much help --- but we'll see if
our readership will give us a scoop...
</strong></p>
<blockquote><img src="../gx/dennis/bbub.gif" alt="(!)" width="50" height="28"
align="left" border="0">
Well Its always good to hear that someone understands and says Lets see
what we can do.
</blockquote>
<!--================================================================-->
<P> <hr> <P>
<H5 align="center"><a href="http://www.linuxgazette.com/ssc.copying.html"
>Copyright ©</a> 1998, James T. Dennis <BR>
Published in <I>Linux Gazette</I> Issue 31 August 1998</H5>
<P> <hr> <P>
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