Generating the error correction file

When you have created the medium image on your hard disk, enter the following:

user@linux> dvdisaster -c dvdisaster-0.64pl2 Copyright 2004,2005 Carsten Gnoerlich. [... remainder of the GPL announcement ...] Opening medium.img: 2224288 medium sectors. Scanning image sectors: 100% Encoding with Codec RS01: 32 roots, 14.3% redundancy. Ecc generation: 100.0% Error correction file "medium.ecc" created. Make sure to keep this file on a reliable medium.

dvdisaster will first check the image for completeness because an error correction file can not be generated for media already containing unreadable sectors!

Generate the error correction file immediately after writing the medium.

The progress will be shown using a percentage reading. Processing a single layered DVD image with the default redundancy takes about 10 minutes on an average 2Ghz system.

When finished, the error correction file medium.ecc appears in the current directory:

user@linux> ls -lA -rwx------ 1 user linux 653721680 2004-07-02 22:45 medium.ecc -rwx------ 1 user linux 4555341824 2004-07-02 21:31 medium.img

You can remove the image file now,

user@linux> rm -f medium.img

but keep the error correction file on a reliable storage medium!

From now on you should regularly scan the medium for read errors...