Ah. Cool. Thanks a lot. That makes sense. I'll have to buy some of those DVD-R's tonight. :)

Gary Gatling | ITECS Systems

On Mon, 11 Jul 2011, Peter Hinse wrote:

Am 11.07.2011 22:47, schrieb Gary Gatling:

...

Thanks a lot for the CentOS 6 distro. I am having trouble burning the i386 dvds. I tried on a RHEL 6 deskop and also a CentOS 5 laptop. The command I am running on both systems is this:

growisofs -dvd-compat -speed=4 -Z /dev/sr0=/home/gsgatlin/CentOS-6.0-i386-bin-DVD/CentOS-6.0-i386-bin-DVD.iso

The error I am seeing is:

:-( /dev/sr0: 2295104 blocks are free, 2297586 to be written!

(Yes it puts a sad face on the command line)

The DVD says DVD +R on it if that matters.

I was able to burn the 64 bit dvd's ok with similar commands. (both #1 and #2)

Any idea what I am doing wrong?

See the Release Notes: http://wiki.centos.org/Manuals/ReleaseNotes/CentOS6.0

"The i386 DVD is just a bit too large to fit on normal single layer DVD+R media. It can be burnt succesfully on DVD-R."

Peter. _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos

On Thu, 14 Jul 2011, Karanbir Singh wrote:

To: CentOS mailing list centos@centos.org From: Karanbir Singh mail-lists@karan.org Subject: Re: [CentOS] problems with burning i386 centos 6 dvd

On 07/11/2011 09:54 PM, Earl wrote:

...

The i386 DVD is just a bit too large to fit on normal single layer DVD+R media. It can be burnt succesfully on DVD-R.

this was a bit unfortunate, for 6.1 we might need to split i386 into 2 DVD's as well ( there are some more rpms added to the distro at 6.1 stage )

I've also looked into the differences between DVD-R(W) disks, and the DVD+R(W) disks. It appears that the DVD+R(W) disks are more reliable, as they have better error correction methods that their DVD-R(W) counterparts.

So for that reason I only use DVD+R(W) media to burn things to.

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On Thursday, July 14, 2011 07:45:56 PM John R Pierce wrote:

DVD-R has slightly more capacity which is important here. I think the differennce in reliability is a red herring.

There is a difference in the technology used for burning, and I've seen where DVD- burning did not work but DVD+ did in the same burner (I've also seen the opposite, and I've seen DVD burners that wouldn't burn or read CD's, too (optical issues with the laser's focus, since a DVD's depth of focus is shorter than a CD's)).

And I'm not talking subtle errors, here, but whole files that are corrupted in massive ways. Apparently the DVD- code path in that burner's firmware interacts in a bad way with the DVD- code paths in wodim/growisofs where the DVD+ code paths in both the burner's firmware and in wodim/growisofs did not have the problem.

(That's just a kind way of saying that the combination of the wodim DVD- code and the burner's DVD- code is buggy; neither is buggy by itself, but the combination is.)

The same code with a different machine and different burner works fine.

On Fri, Jul 15, 2011 at 7:54 PM, Keith Roberts keith@karsites.net wrote:

On Thu, 14 Jul 2011, John R Pierce wrote:

...

To: centos@centos.org From: John R Pierce pierce@hogranch.com Subject: Re: [CentOS] problems with burning i386 centos 6 dvd

On 07/14/11 4:14 AM, Keith Roberts wrote:

...

I've also looked into the differences between DVD-R(W) disks, and the DVD+R(W) disks. It appears that the DVD+R(W) disks are more reliable, as they have better error correction methods that their DVD-R(W) counterparts.

My experience is, some players/readers prefer the DVD-R, others prefer the DVD+R, but most anything newer than first generation ancient DVD doesn't care.   DVD-R has slightly more capacity which is important here.   I think the differennce in reliability is a red herring.

Hi John. This is the article I was eluding to in my post:

Article Why DVD+R(W) is superior to DVD-R(W) Date    June 2003 Author  Michael Spath

http://www.myce.com/article/Why-DVDRW-is-superior-to-DVD-RW-203/

As you can see, it's dated June 2003, so it might not be so relevant now?

Kind Regards,

Keith Roberts

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Any pros vs cons on using a bootable USB thumb drive instead of CD/DVD ?

this might be the better solution as the images just grow larger and larger each update.

I find it much faster to install from USB.

Keith Roberts wrote:

On Fri, 15 Jul 2011, yonatan pingle wrote:

*snip*

...

Any pros vs cons on using a bootable USB thumb drive instead of CD/DVD ?

this might be the better solution as the images just grow larger and larger each update.

I find it much faster to install from USB.

I think that's an option I'm going to have to look into. I suppose you would mount the iso image, and copy the files directly to the USB flash drive?

There are apps/scripts that convert DVD/CD ISO file for use on USB thumb drive. There were even suggestions on one of centos mailing lists I think, and net is full of howto's.

So no, it is not just copy, You need it to boot the installer.

Ljubomir