Files with the .ECC extension contain data used during the reconstruction of various sectors of optical drives that have been damaged and cannot be read correctly. It is unique to Dvdisaster software.

ECC files allow for the reconstruction of data stored on CD, DVD and Blu-ray discs in case they are damaged, which is likely due to their limited lifespan. For such reconstruction to be possible, one must create such a file when the particular drive or its ISO image is available and free of any errors or damage.