burning .dmg image on non-mac

mhill · 08-27-2002, 11:19 AM

Hi, my question is how do you burn a .dmg disc image using a CD-R burner attached to a machine not running OS X, i.e. linux, windows, etc?

On these other platforms a disc image, usually an ISO9660 filesystem, is simply the exact byte stream found on the CD, but .dmg files are different and not well documented, AFAIK. So the .dmg must be converted somehow.

I have tried using Disk Copy to convert a .dmg (compressed UDIF) to a DVD/CD-R master (.cdr.dmg) and got a new coaster. I also tried converting to a UDIF read-only non-compressed image, but got a similar result. The unix file command reports that these images I created are "Apple Partition data...", which seems strange to me. The original compressed image mounts fine under OS X.

Note, I don't want to stick the .dmg file into an ISO filesystem on a CD, but re-create the original CD.

Thanks in advance,
Marti

jasonxz · 08-27-2002, 01:16 PM

Converting a dmg to a cd master format with DiskCopy should work; however, I've only had luck by converting a dmg with Toast, then burning that on a Windows PC with Nero (by changing the file name extension to nrg).

mhill · 08-27-2002, 02:26 PM

OK, I just confirmed that the disc I burned was good. Something is screwy with the machine I tested it out on.

So, to summarize, converting the .dmg file to a DVD/CD-R master image will give you a file you can burn using any non-mac burning software. In my case I used cdrecord under linux.

Martin

rustyslide · 08-27-2002, 06:05 PM

mhill:

I try to let AOL supply me with all my coasters, so here is a hint to help reduce the number you produce.

The loop device in Linux is very useful in testing your images that you create before burning them.

From the cdrecord man page:

mount image.cdr.dmg -r -t iso9660 -o loop /mnt

This should mount the iso9660 image you made with diskcopy and allow you to check that all the files you want on the CDare what you want and where you want them.

The sum or md5 commands are also useful for verifying the contents of your files.

usayd · 09-20-2004, 03:30 PM

Quote:

Originally Posted by mhill


	OK, I just confirmed that the disc I burned was good. Something is screwy with the machine I tested it out on. So, to summarize, converting the .dmg file to a DVD/CD-R master image will give you a file you can burn using any non-mac burning software. In my case I used cdrecord under linux. Martin

rite i dont really understand...can you plz explain exactly how i wud burn a .dmg file on a PC that would work on a mac?

08-27-2002, 11:19 AM	#1
mhill Prospect Join Date: Aug 2002 Location: Toronto Posts: 2	burning .dmg image on non-mac Hi, my question is how do you burn a .dmg disc image using a CD-R burner attached to a machine not running OS X, i.e. linux, windows, etc? On these other platforms a disc image, usually an ISO9660 filesystem, is simply the exact byte stream found on the CD, but .dmg files are different and not well documented, AFAIK. So the .dmg must be converted somehow. I have tried using Disk Copy to convert a .dmg (compressed UDIF) to a DVD/CD-R master (.cdr.dmg) and got a new coaster. I also tried converting to a UDIF read-only non-compressed image, but got a similar result. The unix file command reports that these images I created are "Apple Partition data...", which seems strange to me. The original compressed image mounts fine under OS X. Note, I don't want to stick the .dmg file into an ISO filesystem on a CD, but re-create the original CD. Thanks in advance, Marti

08-27-2002, 02:26 PM	#3
mhill Prospect Join Date: Aug 2002 Location: Toronto Posts: 2	DVD/CD-R master image works OK, I just confirmed that the disc I burned was good. Something is screwy with the machine I tested it out on. So, to summarize, converting the .dmg file to a DVD/CD-R master image will give you a file you can burn using any non-mac burning software. In my case I used cdrecord under linux. Martin

08-27-2002, 06:05 PM	#4
rustyslide Prospect Join Date: Aug 2002 Location: Halifax NS Canada Posts: 6	Reducing the number of coasters mhill: I try to let AOL supply me with all my coasters, so here is a hint to help reduce the number you produce. The loop device in Linux is very useful in testing your images that you create before burning them. From the cdrecord man page: mount image.cdr.dmg -r -t iso9660 -o loop /mnt This should mount the iso9660 image you made with diskcopy and allow you to check that all the files you want on the CDare what you want and where you want them. The sum or md5 commands are also useful for verifying the contents of your files. Last edited by rustyslide; 08-27-2002 at 07:48 PM.

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08-27-2002, 01:16 PM	#2
jasonxz Triple-A Player Join Date: Feb 2002 Location: Foster City, CA Posts: 63	Converting a dmg to a cd master format with DiskCopy should work; however, I've only had luck by converting a dmg with Toast, then burning that on a Windows PC with Nero (by changing the file name extension to nrg).