dvdisaster Version 0.72 | To the Internet version

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### General questions and answers

1.1 How is "dvdisaster" pronounced?

1.2 What are quality scans and why don't you support more?

1.3 Is dvdisaster compatible with future releases?

1.1 How is "dvdisaster" pronounced?

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

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1.2 What are quality scans and why don't you support more?

Optical media have a built-in error correction which is similar to the method used in dvdisaster. Some drives can report the number of errors corrected while reading a medium. This provides a rough estimate of the writing and media qualities.

Since dvdisaster is free software, it can only include code and information which can be redistributed freely. This is currently true for C2 scanning of CD media, which is officially standardized and has free documentation available.

On the other hand, DVD quality scans ("PI/PO scans") are not standardized. Those drive vendors who support it are using proprietary programming interfaces. The respective specifications seem not to be available for use in free software. So we must patiently wait until manufacturers understand that having free software available for a drive will sell more drives.

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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 images and error correction data created from previous versions. There is no need to recreate them again.

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Old documentation (V0.70)

Copyright 2004-2009 Carsten Gnörlich. Verbatim copying and distribution of this entire article is permitted in any medium, provided this notice is preserved.