The next steps depend on the source for the error correction data. Select between these two ways:

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Create error correction file from a CD/DVD/BD medium

Create error correction file from an ISO image

Insert the medium you want to read into a drive which is directly connected to your computer. You can not use network drives, software drives and drives inside virtual machines.

Close any windows which may be opened by your operating system for viewing or performing the medium contents. Wait until the drive has recognized the medium and the medium has spun down.

Select the drive containing the medium in dvdisasters drop down menu.

Select a directory and file name for storing the ISO image.

Create the ISO image from the medium by clicking the "Read" button.

Watch the reading progress. Wait until the medium has been completely read. If the medium turns out to contain defective sectors it will not be possible to create error correction data.

Select the directory and name of the ISO image for which you want to create the error correction data. (It is assumed that the ISO image has been created by some other means, e.g. by using your CD/DVD/BD authoring software.)

Select a directory and name for storing the error correction file.

Create the error correction file by clicking the "Create" button.

Wait until the creation process finishes. This may take a while depending on the image size and the selected redundancy. For example creating an error correction file using the "normal" redundancy setting will take about 5 minutes for a 4GB sized DVD image and using standard hardware.

Wrapping up. You can delete the image file now. However you must keep the error correction file and, even more important, protect it from being damaged. Refer to the next page for some suggestions about error correction file archival.

Error correction file archival...