General questions and answers

1.2 Where do I get more information on PI/PO scans?

1.3 Is dvdisaster compatible with future releases?

Since the word stems from the english language, simply spell "dv" before saying "disaster". Perhaps "dee-vee-disaster" is a suitable phonetic circumscription.

The error correction in DVD media is similar to the method used in dvdisaster. DVDs have two steps (or layers) of error correction which are called PI and PO. Only when both layers fail to correct an error, the drive will report an unreadable sector and dvdisaster gets some work to do (or the medium can be thrown away).

For certain drives software has been published which can report how frequently both error correction layers are utilized when reading from the DVD. There are lots of interesting internet forums containing links to such tools. Many well informed articles on interpreting PI/PO values with respect to the media quality are also available.

1.3 Is dvdisaster compatible with future releases?

Yes, dvdisaster files are intended for an archival time of many years. When upgrading to a newer version of dvdisaster you can continue using existing image and error correction files from previous versions. There is no need to recreate them again.