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 Forum index » House Training » Users ( For the regulars )
How to make an exact bit-for-bit copy of a CD or DVD? (Solve
Moderators: Flash, Ian, JohnMurga
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jeffrey

Joined: 16 Jan 2006
Posts: 162
Location: Christchurch, New Zealand

PostPosted: Fri 14 Sep 2007, 00:29    Post subject:  How to make an exact bit-for-bit copy of a CD or DVD? (Solve
Subject description: Can I copy a bootable CD with cdrecord?
 

I've used cdrecord over the years to copy files to CD or to burn a bootable image to CD. That's not a problem.
But if I have a bootable CD (say a Puppy CD) and I want to burn a bootable copy of it (when I don't have the ISO to hand) is there an easy, generic way to do that?
Or is it possible to clone a CD perfectly, irrespective of its contents? (That's probably asking too much!)
Thanks...
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Flash
Official Dog Handler


Joined: 04 May 2005
Posts: 12719
Location: Arizona USA

PostPosted: Fri 14 Sep 2007, 00:43    Post subject:  

If I remember right, Record Now (a Windows program) has a "make an exact copy" option which I would expect to work. I never tried it though. As for whether any of the programs in Puppy will make an exact copy, I have no idea. I never looked into it.
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jeffrey

Joined: 16 Jan 2006
Posts: 162
Location: Christchurch, New Zealand

PostPosted: Fri 14 Sep 2007, 00:47    Post subject:  

Thanks for the fast answer. I'm keen on a Linux solution using cdrecord if possible (and probably mkisofs and other bits and pieces too).
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Bruce B

Joined: 18 May 2005
Posts: 11488
Location: The Peoples Republic of California

PostPosted: Fri 14 Sep 2007, 02:11    Post subject:  

Quote:
Or is it possible to clone a CD perfectly, irrespective of its contents? (That's probably asking too much!


I don't think it's asking to much. Is bit for bit copy good enough? If not bit for bit something went wrong.

If you've got the CD disk already:

To make iso copy of data cd disk


dd if=/dev/hdb of=my.iso

I also use the command below, sometimes even for 8gb movie dvds

dd if=/dev/hdb of=my.iso bs=2048

to check your work

md5sum /dev/hdb
md5sum my.iso


If the sums match, its ready for burning to blank disk

to burn iso 2 cd

cdrecord -v dev=ATAPI:/dev/hdb speed=16 -dao driveropts=burnfree -data my.iso

(adjust speed to preferences, there are also many potential options and arguments for cdrecord, this is just one sample)

to verify the new burn:

md5sum /dev/hdb

-----------------------

Where /dev/hdb is the Linux drive for YOUR pc, otherwise change it.
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wingruntled

Joined: 20 Feb 2007
Posts: 287
Location: Great Lakes

PostPosted: Fri 14 Sep 2007, 11:27    Post subject:  

jeffery
I don't know what version of puppy you are running, but with 2.1.7 you can use Grafburn to do a CD/DVD diskcopy.
From grafburns main menu select tools then CD/DVD copy. I just made a bootable copy of 2.13 and it worked fine.
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Flash
Official Dog Handler


Joined: 04 May 2005
Posts: 12719
Location: Arizona USA

PostPosted: Fri 14 Sep 2007, 16:35    Post subject:  

Oh my goodness, why is that buried in the "Tools" menyu?

Thanks. Smile
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jeffrey

Joined: 16 Jan 2006
Posts: 162
Location: Christchurch, New Zealand

PostPosted: Sun 16 Sep 2007, 23:58    Post subject:  

Thanks, Bruce.
The 'dd' command gives me exactly what I wanted. I should have thought of that!
Jeffrey
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