Jigdo instructions, please

Kevin J. Cummings cummings at kjchome.homeip.net
Tue Feb 19 08:24:58 UTC 2008

Robert P. J. Day wrote:
> On Mon, 18 Feb 2008, Kevin J. Cummings wrote:
>> Timothy Murphy wrote:
>>> I have heard of "mount -o loop". But the instructions say one
>>> should insert a DVD, which I take to mean that one should insert a
>>> DVD.
>> They ask you to insert a DVD so that its filesystem can be mounted
>> and you can access the files on that DVD.
>>> This is not always - or even usually - equivalent to "mount -o loop".
>> huh?  Its almost always the same.  Unless you are using the DVD for
>> something non-standard.  (years ago I used to write .tar files
>> directly to floppy media.  I suppose you could arrange to use a DVD
>> in the same fashion, but most people don't.)  Most DVDs contain ISO
>> (or UDP) filesystems (which for the sake of this argument are
>> equivalent).
> i would disagree.  with a physical DVD, you're mounting a block
> device, while you'd mount with "-o loop" if you're mounting a regular
> file that happens to be an ISO image.  let's not confuse the two.

I'm not confusing the two.  With a DVD, the ISO is burned to the disk.
You could always recover it via "cat /dev/dvd > image.iso" (or something
similar for your device name).  Both are ultimately an ISO image.  Only
the container (and as you said the actual mount options) differ.  I
guess you like to split hairs.

> rday
> --
> ========================================================================
> Robert P. J. Day
> Linux Consulting, Training and Annoying Kernel Pedantry:
>     Have classroom, will lecture.
> http://crashcourse.ca                          Waterloo, Ontario, CANADA
> ========================================================================

Kevin J. Cummings
kjchome at rcn.com
cummings at kjchome.homeip.net
cummings at kjc386.framingham.ma.us
Registered Linux User #1232 (http://counter.li.org)

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