What is a sector-by-sector back up (raw image)?
The sector-by-sector method allows you to create an image of all sectors of the selected partition. This image will contain not only sectors with data but also sectors that are free. As a result, this image will be equal in size to the disk being imaged, as there is no data compression. This method is useful if a partition being backed up is not supported by Acronis True Image 9.0 or is corrupted. In this case, all sectors of this partition are included in this image and will be restored.