Image file selection

The image file contains the data from all medium sectors, including the information whether a sector was readable. dvdisaster works on image files because they are stored on hard disk which makes certain random access patterns much faster. Applying this kind of random access to CD/DVD/BD drives would slow them down significantly and eventually wear them out (the image files are created using sequential access which unlike random access is handled efficiently by the drives). The default file suffix for images is ".iso".

There are two ways of choosing the image file:

using a file chooser dialog (button marked green), or
by directly entering the file location (text entry field marked blue).

The direct entry is helpful when you are processing several files in the same directory. In that case simply change the file name in the text field.