Re: Jigdo instructions, please

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On Tue, 19 Feb 2008, Kevin J. Cummings wrote:

> 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.

heh.  what part of "pedantry" is confusing you?  :-)

rday
--

========================================================================
Robert P. J. Day
Linux Consulting, Training and Annoying Kernel Pedantry:
    Have classroom, will lecture.

http://crashcourse.ca                          Waterloo, Ontario, CANADA
========================================================================

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