On Nov 3, 2011, at 7:47 PM, David W. Morris wrote:

> sn't it because the ISO should an CD-ROM format, such as Rockridge, or 
> Joliet, or ISO 9660, and not a file format that is used on hard drives?  

Well actually ISO is a partitioning scheme, which hosts a file structure, which 
may be a variety of underlying file systems, like MS-DOS and HFS+.


> I have created many useless CD-R drink coasters while trying to burn an ISO 
> to a CD-R disc, because MacOSX often mistakenly asks if I want to burn the 
> "Contents" of the ISO image to the CD-R, instead of burning the ISO image on 
> to the CD-R and I forget that doing it that way does not create a CD-ROM that 
> can be read on other computers.  When I use OSX's Disk Utility and burn the 
> ISO image to the CD-R, I get a CD-ROM that can be read on any computer.


That actually doesn't have anything to do with the ISO-ness of the dis image, 
but the way you'e burining the image….the first occurs when you tell OS X to 
put a file onto a disk (the iso file) and make a data CD out of it. The second 
(via Disk Utility) you're explicitly telling the mac that the file in question 
is a disk image and should be treated as such, hence the successful burning.


-- 
Bruce Johnson
University of Arizona
College of Pharmacy
Information Technology Group

Institutions do not have opinions, merely customs

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