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Old 06-23-2010, 10:34 AM   #1
Steve Rindsberg
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Default CD formats: UDF vs ISO 9660

Short version: UDF CDs ... does anyone know of any major incompatibilities?

Expanded version:

All these years I've been making CDs in ISO 9660 because ... um ... I guess that's what all the CD burning software defaulted to.

But now I've FTP'd down an entire site for a customer in order to make a backup. FileZilla *rocks* by the way.

When I try to burn a CD of the whole mess, the CD-burning software squawks because ISO 9660 only allows something like 8 subdirectory levels. The site has at least double that.

So I burned a UDF CD instead. Did some checking around while it was burning and found that it SHOULD be compatible with most Windows and Mac OS X versions. Tested on an XP computer and had no troubles reading the thing, but I'm wondering if there are any pitfalls I should be aware of.

   
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Old 06-23-2010, 12:22 PM   #2
Michael Rowley
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Steve:
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that it SHOULD be compatible with most Windows and Mac OS X versions
According to Wikipedia, Universal Disk Format is supported by Mac 9 and Mac 10.something, Linux (presumably the later versions), and Windows Vista and Windows 7. ISO 9660 is old hat.

Quote:
The site has at least double that
You have MS as a customer?

   
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Old 06-23-2010, 04:32 PM   #3
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I read that Wikipedia article too. That satisfied the "What's theory here?" side of the equation. I was looking more for "I tried that once and it bit me. Wanna see the toothmarks?" practical side of things.

>> You have MS as a customer?

Things would be considerably different if I did. But alas, or perhaps thank heavens, no.

   
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Old 06-23-2010, 05:39 PM   #4
Hugh Wyn Griffith
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This article raises some points about the different version levels of UDF and their compatibilities:

http://homepage.ntlworld.com/allcam/cdformat.html

I see that DVDs use UDF and not the ISO.

This is probably the most useful reference however in view of the reputation of Isobuster:

http://www.isobuster.com/help.php?help=160

Note that the Joliet extension to ISO 9660 provides for the longer file names and much deeper directory levels. Also that:

<< UDF 1.02 is supported by Windows 98 or higher if the media is closed and contains a TOC. It is preferred over Joliet and ISO9660 if found. >>

   
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Old 06-24-2010, 07:48 AM   #5
Steve Rindsberg
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Quote:
Originally Posted by Hugh Wyn Griffith View Post
This article raises some points about the different version levels of UDF and their compatibilities:

http://homepage.ntlworld.com/allcam/cdformat.html

I see that DVDs use UDF and not the ISO.

This is probably the most useful reference however in view of the reputation of Isobuster:

http://www.isobuster.com/help.php?help=160

Note that the Joliet extension to ISO 9660 provides for the longer file names and much deeper directory levels. Also that:

<< UDF 1.02 is supported by Windows 98 or higher if the media is closed and contains a TOC. It is preferred over Joliet and ISO9660 if found. >>
Thanks, Hugh. I'll have a read next.

Closing CDs is an article of faith with me. The first thing I do with any new CD-burning app is work out how to set the defaults to closing the CD immediately. If I couldn't do that, I'd find another way of burning the CD.

FWIW, I needed a way of burning CDs/DVDs from a Vista box and a friend recommended ImgBurn: http://www.imgburn.com/

I've been quite pleased with it. It's free, doesn't nag, doesn't insist on installing a bunch of media apps and codecs and baudknowswhats that I don't want or need. It just burns platters.

   
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Old 06-24-2010, 04:03 PM   #6
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Yes I use imgburn for turning ISO bootables into usable disks.

ISObuster is another useful one if you want to do the reverse -- go inside an ISO image to see what is there or to modify it.

And Autostreamer is a utility that made it so simple to slipstream SP2 and then SP3 into the original XP CD that even I could do it <g>

   
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Old 06-25-2010, 05:36 AM   #7
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I'd stumbled across ISOBuster ... ah, because you gave me the link in the last message. Autostreamer looks like a handy thing too. Thanks!

   
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Old 06-24-2010, 12:56 PM   #8
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Hugh:
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This article raises some points about the different version levels of UDF and their compatibilities
It's interesting, Hugh, but badly out of date, having been written seven years ago. UDF is now an ISO format (though not ISO 9660), so DVDs also use an ISO format, and so do CDs.

Thank goodness some Web pages carry the date when they were written—but not nearly enough of them.

   
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Old 06-24-2010, 04:09 PM   #9
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Yes -- it's a shame people do not date technical articles.

   
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Old 06-24-2010, 12:44 PM   #10
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UDF is best these days, Steve. Write the CD in disc-at-once to finalize it, and turn off anything that suggests multisession, XA, or appendable.

   
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