[lug] question about dd

[David Trowbridge]

The easiest way is to have a drive with what you want on it first, and run
dd to copy to a file. Then you will have a bit-for-bit image of the
drive, which you can then use to restore/duplicate the disk as needed
using the command you specified.

No other command line options are needed, seeing as they only allow you to
control frame sizes during the copy, etc.

-David

-------------------
David Trowbridge
jupiter at flatirons.org
http://jupiter.babylonia.flatirons.org

"Base 8 is just like base 10 really...if you're missing two fingers"
	-Tom Lehrer

On Sun, 6 May 2001, Steve Casal wrote:

> Thanks for your help. I'm aware of the issues you raised but I plan on
> creating EVERY sector that will go on the disk. To be more specific, I won't
> be using a known filesystem. This is a proprietary filesystem that I'm
> making. I guess what I really want is your command with the file and hd
> reversed ... kind of like this:
>
> dd if=file of=/dev/hd<n>
>
> The question I was having is if I need any other command line options and
> from the looks of things I may not. The other quesiton is, can I just create
> a binary file that contains a byte for each available byte on the disk and
> they use the dd command above?
>
> Thanks for your help.
>
> Steve
>
>
>
> >From: David Trowbridge <jupiter at flatirons.org>
> >Reply-To: lug at lug.boulder.co.us
> >To: <lug at lug.boulder.co.us>
> >Subject: Re: [lug] question about dd
> >Date: Sun, 6 May 2001 10:21:46 -0600 (MDT)
> >
> >This is fiarly simple, but there are a couple issues I'd like to raise:
> >first, the command to do this is:
> >dd if=/dev/hd<n> of=file
> >
> >The problems with this is that it will copy everything - partition tables,
> >disk sizes, etc, so if you use your image to write a drive that is not
> >exactly the same size, it will not fill up the disk completely, and may
> >not even work at all.
> >
> >-David
> >
> >-------------------
> >David Trowbridge
> >jupiter at flatirons.org
> >http://jupiter.babylonia.flatirons.org
> >
> >"Base 8 is just like base 10 really...if you're missing two fingers"
> >	-Tom Lehrer
> >
> >On Sun, 6 May 2001, Steve Casal wrote:
> >
> > > Hi,
> > >     I would like to create a file that's an image of exactly what I want
> >on
> > > a given hard disk. In other words I want to specify the exact contents
> >of
> > > each sector of the given drive. I would think that I should be able to
> > > create some kind of file that can act as an "image" of the drive and
> >then
> > > use dd to get this so called image on the drive. Unfortunately, I'm not
> >very
> > > familiar with dd and have never done anything like this before. I'm
> >hoping
> > > someone can give me an idea of how to accomplish this.
> > >
> > > Steve
> > > _________________________________________________________________
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