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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