Some help with dd backing up into an iso

From	GiaThnYgeia <GiaThnYgeia@openmailbox.org>
Newsgroups	linux.debian.user
Subject	Some help with dd backing up into an iso
Date	2017-03-07 01:20 +0100
Message-ID	<tib17-7Ap-13@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

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I am not very confident I am doing this right and it seems wrong,  I
can't locate any documentation that results into proper options.
I tried backing up an 8gb USB that has 2 partitions in it, one had 1.7gb
of data on it.
I used dd if=/dev/sdb of=usbfilename.iso
The resulting image was the full size of the disk.
To test the validity I restored reversing the order of the filenames
if/of  but that took for ever and it was a hog on resources.  After a
while I just gave up and killed the process.  I looked at the disk and
it seemed complete with all files in tact, so maybe I killed it
somewhere in the verification process.
So I used a program called etcher which I have used with 100% success in
the past and was surprisingly fast in burning images.
It took for ever as well, eventually it run a verification routine and
it was done.
Is there someway one can avoid creating such a large iso for no reason,
when the filesize is a fraction of the whole disk.  One way I thought of
was to shrink the partitions to just about 99% full, and leave the blank
part of the disk as not allocated.  Would that help?
Is there some fancy command line that does just that?

Thank you in advance




-- 
 "The most violent element in society is ignorance" rEG

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Some help with dd backing up into an iso GiaThnYgeia <GiaThnYgeia@openmailbox.org> - 2017-03-07 01:20 +0100
  Re: Some help with dd backing up into an iso Michael Lange <klappnase@freenet.de> - 2017-03-07 02:10 +0100
  Re: Some help with dd backing up into an iso David Christensen <dpchrist@holgerdanske.com> - 2017-03-07 06:10 +0100
    Re: Some help with dd backing up into an iso David Christensen <dpchrist@holgerdanske.com> - 2017-03-07 07:00 +0100
      Re: Some help with dd backing up into an iso "Thomas Schmitt" <scdbackup@gmx.net> - 2017-03-07 09:00 +0100
        Re: Some help with dd backing up into an iso GiaThnYgeia <GiaThnYgeia@openmailbox.org> - 2017-03-07 18:30 +0100
          Re: Some help with dd backing up into an iso "Thomas Schmitt" <scdbackup@gmx.net> - 2017-03-07 20:20 +0100
            Re: Some help with dd backing up into an iso GiaThnYgeia <GiaThnYgeia@openmailbox.org> - 2017-03-08 05:00 +0100
              Re: Some help with dd backing up into an iso David Christensen <dpchrist@holgerdanske.com> - 2017-03-08 07:00 +0100
              Re: Some help with dd backing up into an iso "Thomas Schmitt" <scdbackup@gmx.net> - 2017-03-08 12:10 +0100
                MBR partitioning, and content after partition table but before first  partition David Christensen <dpchrist@holgerdanske.com> - 2017-03-09 06:50 +0100
                Re: MBR partitioning, and content after partition table but before  first partition Felix Miata <mrmazda@earthlink.net> - 2017-03-09 08:00 +0100
                Re: MBR partitioning, and content after partition table but before  first partition David Christensen <dpchrist@holgerdanske.com> - 2017-03-10 06:10 +0100
                Re: MBR partitioning, and content after partition table but before  first partition Jonathan Dowland <jmtd@debian.org> - 2017-03-10 10:00 +0100
                Re: MBR partitioning, and content after partition table but before  first partition David Christensen <dpchrist@holgerdanske.com> - 2017-03-11 07:10 +0100
                Re: MBR partitioning, and content after partition table but before  first partition Jonathan Dowland <jmtd@debian.org> - 2017-03-13 10:10 +0100
                Re: MBR partitioning, and content after partition table but before  first partition David Christensen <dpchrist@holgerdanske.com> - 2017-03-14 04:40 +0100
                Re: MBR partitioning, and content after partition table but before  first partition David <bouncingcats@gmail.com> - 2017-03-14 11:40 +0100
                Re: MBR partitioning, and content after partition table but before  first partition David Christensen <dpchrist@holgerdanske.com> - 2017-03-15 03:50 +0100
                Re: MBR partitioning, and content after partition table but before  first partition The Wanderer <wanderer@fastmail.fm> - 2017-03-14 13:00 +0100
                Re: MBR partitioning, and content after partition table but before  first partition David Christensen <dpchrist@holgerdanske.com> - 2017-03-15 04:10 +0100
                Re: MBR partitioning, and content after partition table but before  first partition Andy Smith <andy@strugglers.net> - 2017-03-15 04:40 +0100
                Re: MBR partitioning, and content after partition table but before  first partition Jonathan Dowland <jmtd@debian.org> - 2017-03-15 13:00 +0100
                Re: MBR partitioning, and content after partition table but before first partition "Thomas Schmitt" <scdbackup@gmx.net> - 2017-03-09 08:30 +0100
                Re: MBR partitioning, and content after partition table but before  first partition Jonathan Dowland <jmtd@debian.org> - 2017-03-09 15:40 +0100
    Re: Some help with dd backing up into an iso Teemu Likonen <tlikonen@iki.fi> - 2017-03-07 09:30 +0100
      Re: Some help with dd backing up into an iso <tomas@tuxteam.de> - 2017-03-07 09:40 +0100
        Re: Some help with dd backing up into an iso Teemu Likonen <tlikonen@iki.fi> - 2017-03-07 10:00 +0100
          Re: Some help with dd backing up into an iso <tomas@tuxteam.de> - 2017-03-07 10:10 +0100
          Re: Some help with dd backing up into an iso David Wright <deblis@lionunicorn.co.uk> - 2017-03-07 16:20 +0100
      Re: Some help with dd backing up into an iso Jonathan Dowland <jmtd@debian.org> - 2017-03-07 11:10 +0100
      Re: Some help with dd backing up into an iso David Christensen <dpchrist@holgerdanske.com> - 2017-03-08 06:00 +0100
  Re: Some help with dd backing up into an iso Mark Fletcher <mark27q1@gmail.com> - 2017-03-07 12:10 +0100
  Re: Some help with dd backing up into an iso Eduardo M KALINOWSKI <eduardo@kalinowski.com.br> - 2017-03-07 14:50 +0100
  Re: Some help with dd backing up into an iso Elimar Riesebieter <riesebie@lxtec.de> - 2017-03-07 15:20 +0100
  Re: Some help with dd backing up into an iso David Wright <deblis@lionunicorn.co.uk> - 2017-03-07 16:20 +0100
    Re: Some help with dd backing up into an iso "Thomas Schmitt" <scdbackup@gmx.net> - 2017-03-07 18:10 +0100
      Re: Some help with dd backing up into an iso David Wright <deblis@lionunicorn.co.uk> - 2017-03-07 19:00 +0100
        Re: Some help with dd backing up into an iso "Thomas Schmitt" <scdbackup@gmx.net> - 2017-03-07 20:30 +0100
          Re: Some help with dd backing up into an iso David Wright <deblis@lionunicorn.co.uk> - 2017-03-07 21:30 +0100
            Re: Some help with dd backing up into an iso "Thomas Schmitt" <scdbackup@gmx.net> - 2017-03-07 22:10 +0100
              Re: Some help with dd backing up into an iso GiaThnYgeia <GiaThnYgeia@openmailbox.org> - 2017-03-08 18:30 +0100
                Re: Some help with dd backing up into an iso David Wright <deblis@lionunicorn.co.uk> - 2017-03-08 19:20 +0100

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