
About O&O DiskImage 9
O&O DiskImage-3
Image file
An image can be made up of one or more image files (*omg). If, for example, the disk where you want to save the image
isn't large enough, you can split the image onto multiple disks. When you split your image onto several disks, a new
image file will be created on each disk and together, these image files will be parts of one entire image. It's important to
number the disks (CD/DVD) in case you want to later restore a drive using the image, or use it as a base for an incre-
mental imaging.
File formats
O&O DiskImage creates its own file formats when imaging but is also able to process other file formats.
File format OMG
O&O DiskImage generates the file extension (*OMG)for the image files it creates when imaging your entire computer or
single drives. This file type can be used for further activities by O&O DiskImage, such as restoration, validation or con-
version.
File format OBK
While creating a file backup using O&O DiskImage, the files and folder are compressed and stored as OBK file (*.obk).
An advantage of the OBK files are that you can also use and extract the data with a decompression program like Win-
Zip. You don't necessarily need O&O DiskImage to extract these files. Encrypted file backups are the exception. They
can only be processed with O&O DiskImage.
File format VHD
O&O DiskImage is able to create and edit file formats for virtual computers (VPC/VM-Ware). This allows you to also
mount a drive from an image as a virtual drive in the VPC or your VM-Ware.
Complete image
Using the Complete image method, the data selected for imaging will be imaged all over again and stored in a folder on
the target disk. Complete images can be created using the "Used sector", "Forensic", or "Direct forensic" methods.
Differentiation: Image of the changes
If you only want to image changes of your hard disk or drives, you will need to have created at least one complete
image previously. Changes made can then be saved as differential and incremental images.
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