SergioDM <ottone@gypsie.ottoheadquarter> wrote in message news:<Mj4Sd.42176$lB4.1153422@twister1.libero.it>. ..
> jurij@device-image.de ha scritto:
> > Please visit the homepage of DeviceImage-Project:
> > http://www.device-image.de
> >
> > Disk images provide a powerful backup-restore solution and are exact
> > copies of your hard drive which are created by using low level byte by
> > byte copy operation. So even if your drive goes bad, you will still
> > have an entire copy of your system that you can restore.
>
> So, exactly like "dd"...
>
> >
> > zsplit and unsplit are Linux utilities.
> > zsplit is a command line imager, which allows you to create an exact
> > disk image. Finally it compresses the output image file and splits it
> > into chunks of defined size to fit exactly the size of storage media
> > (CD, DVD or HDD).
>
> dd if=/dev/disk of=/dev/stdout | tar czf backup.tar.gz | split -b <size>
>
> >
> > unzsplit is a command line restore tool. It restores files produced by
> > zsplit to its origin, i.e. splitted and compressed image files will be
> > uncompressed, tied together and restored to the original device or
> > partition.
> cat piece1 piece2 ... piecen | tar xz | dd ...
>
> Do we really need those utilities?
> Regards
> Sergio

Try it with files bigger then 4 Gygabyte, for sure you will get in
trouble... It was one of reasons for me to write a new tool. Besides,
using more tools in some combination is not very good if you want to
control the progress in compressing and splitting - it was the next
reason to write something new. Actually these tools are only the first
functional approach, I hope I can realize my idea to write a very
flexible and simple for user imaging tool. At this step the difference
from already known tools is the combination of features in one tool
and it is easily to use in scripts than your suggestion.

Regards,
Jurij