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.

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).

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.

Key Features :

1. runs under GNU/Linux OS

2. creates images from FAT16, FAT16X, FAT32, FAT32X, NTFS (MS Windows-
95, -98, -Me, -NT4, -2000, -XP), Linux Ext2, Linux Ext3, ReiserFS and
Linux swap partitions.

3. is able to create images from Very Large Files or devices (tested
with 200 Gygabyte devices)

4. output image files can be compressed to various density (900 MiB
(megabyte binary) FAT32 partition can be compressed to 350 - 400 MB
and can be stored on one CD)

5. output image file can be splitted into pieces of defined size

6. in case of partially damaged devices, blocks and/or sectors safely
reads all remaining intact sectors

7. supports non-seekable input and output (so you can use pipes for
stdin and/or stdout)

Please visit the homepage of DeviceImage-Project:
http://www.device-image.de

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
--
"Two plus two gives five, for extremely large values of two."
...ooOO <sedimico chi@cci@la libero p.u.n.t.o. it> OOoo..
Linux Registered User #366688
on http://counter.li.org

On 2005-02-20, SergioDM <ottone@gypsie.ottoheadquarter> wrote:

[many snips]

> dd if=/dev/disk of=/dev/stdout | tar czf backup.tar.gz | split -b <size>
> cat piece1 piece2 ... piecen | tar xz | dd ...
>
> Do we really need those utilities?

Possibly. If any of your pieces are corrupted, you'll likely lose every
piece afterwards. It's possible that zsplit and unzsplit avoid that
scenario.

Or, asked another way, do we really need zcat? Not really, but it's
pretty handy, no? So, don't be too harsh until you try the utilities
and see if they're any use. (FWIW, I won't bother, but that's because I
don't have a strong need for those tools right now.)

--keith

--
kkeller-usenet@wombat.san-francisco.ca.us
(try just my userid to email me)
AOLSFAQ=http://wombat.san-francisco.ca.us/cgi-bin/fom
see X- headers for PGP signature information

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

jurij@device-image.de ha scritto:
> 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

I admit it. I'm gonna take a look to the site.
Bye
Sergio
--
"Two plus two gives five, for extremely large values of two."
...ooOO <sedimico chi@cci@la libero p.u.n.t.o. it> OOoo..
Linux Registered User #366688
on http://counter.li.org