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Old 10-04-2004, 01:15 PM   #1
nmarus
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Fedora 2 DVD ISO issues


Ok this one is killing me... I just downloaded Fedora DVD ISO. md5sum'ed it, verified it agaist the fedora homepage, all good.

Burned it to a dvd, used Roxio 7 and Nero for a total of 3 different disks(+,-). Each time I try and verify the disk (any of the 3) prior to the install it fails. I mount the ISO file directly, and do the test with the installer, it passes.

Am I totally missing something with buring a DVD ISO to disc? Tried + and - R's. Each does the same, fails the media check. Even tried going through the install anyway, fails with missing files. Installing directly form the ISo works like a champ, but I want a hard copy.

Any help?
 
Old 10-04-2004, 10:57 PM   #2
kostason
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hi,

A few, i hope helpful, tips.
* burn the iso in a lower speed (2x or even 1x)
* let Nero verify the data on the disk
* don't do anything else with your PC while you are burning
* buy better quality DVD disks
* buy a new DVD recorder
 
Old 10-04-2004, 11:01 PM   #3
nmarus
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Tried 2x DVD-R's and 4x DVD + R's. Havent had a single bad disk in the lot yet. I was thinking this at first, but now 4 DVD's all with issues.

Brand Spankin new DVD recorder. Burned nearly 15 DVD's sofar with no issues.

So strange, I'll try the verify and see what happens.


Quote:
Originally posted by kostason
hi,

A few, i hope helpful, tips.
* burn the iso in a lower speed (2x or even 1x)
* let Nero verify the data on the disk
* don't do anything else with your PC while you are burning
* buy better quality DVD disks
* buy a new DVD recorder
 
Old 10-23-2004, 11:16 AM   #4
zerovoid
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Look at the size of your dvd iso, the one I currently see on Fedora's site is only 77mb.
Is the size of the iso image you are trying to install the dvd to, only 77mb. Now lets look at the iso images they much bigger each and add up to being much greater.

Try looking at http://www.linuxcompatible.org/story23334.html

Titled Tip: Creating Fedora DVD ISO
It is a script that allows you to join the cd iso's and make them a DVD.

Let me know if this helps.
 
Old 05-02-2005, 10:17 PM   #5
rakslice
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Registered: Jul 2004
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Fedora Core 2 ISO issues

Ah, yes. This is a wierd one, but there's a dead giveaway:

The Fedora Core 2 DVD ISO image is just over 4 GB (2 to the power of 32 bytes) in size; 77 point some odd MB over in fact.

For many mirror sites, this is the first file larger than 4GB that they've hosted. The file is running into problems with server and/or mirroring software designed at a time when hosting of files that large online would have been impractical; developers just went ahead and handled the file size as a 32-bit unsigned integer, making the assumption that hosted files would always be less than 4GB, to keep things nice and fast on 32-bit machines. Somewhere along the way between the Fedora project and the server you're using, some programs' request for the file size overflowed to give 77MB, and it only copied 77 MB and ignored the rest.

Compounding the problem, the md5sum value listed is only for the first 77MB of it. So, running md5sum on the broken 77MB file will give you the right value, masking the problem. (How this happened, IIRC, is that the standard md5sum prog doesn't support large files either, so running it on the actual >4GB file only calculates the sum for the first 77 MB).

How to get around this: Use a reliable protocol & download source that is known to support large files (e.g. torrents, with a recent bt client).
 
  


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