User Manual

User's guide O&O DiskImage Select imaging method
Select imaging method
Under Drive operation/Imaging options/Image file you can specify which imaging method
should be applied as standard to every new image. In most cases, the default option Used sector is
recommended.
Used sector imaging
Using this imaging method will limit the imaging process to only used sectors on a drive. This
method will let you save time, computer performance, and disk space. Used sector imaging is set in
the program by default.
Image of the changes
If you only want to save changes made since the last imaging, select Image of the changes as
method under Imaging options. This will allow you to create an image that saves only those
changes that have occurred since the last base image.
While creating an image of the changes, O&O DiskImage compares each sector of the existing
image with the corresponding sector of the disk(source)being imaged. This might require more
time than a complete image. An image of the changes, however, takes up much less space than a
complete image.
Note:
If you want to create an image of the changes, you must have created at least one complete image
of each drive that can then serve as a base image. Afterwards, the image of the changes you've
created can also serve as a new base image.
Note:
The option Use checksums to administer unchanged data is always set by default. The last
incremental/differential image created is enough to serve as the base image when creating an
Image of the changes. If Use checksums to administer unchanged data is not set, you will
need the last base image and all existing incremental images because these must be accessed as
part of the imaging process.
Forensic imaging
This imaging method is especially useful when creating images of non-supported file systems or
when, for example, you would like to recover deleted data from a source drive using special data
recovery software. With this method, an exact sector-level copy of the source drive is made. By
saving all sectors of a partition or drive, the unoccupied and deleted portions of file systems can be
imaged in their entirety.
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