dvdisaster Version 0.55
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Command syntax
Questions and Answers
·Technical Questions
·Error messages
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Error messages

3.1 "Warning: 2 sectors missing at the end of the disc".

3.2 Program blocks right after invocation.

3.3 What does "CRC error, sector: n" mean?

 

 
3.1 "Warning: 2 sectors missing at the end of the disc"

This warning appears with CD media written in "TAO" (track at once) mode. Some drives report an image size which is 2 sectors too large for such media, producing 2 pseudo read errors at the end of the medium which do not mean data loss in this case.

Since the writing mode can not be determined from the medium, dvdisaster assumes a "TAO" CD if exactly the last two sectors are unreadable, and trims the image accordingly. It is up to you to decide whether this is okay. You can advise dvdisaster to treat these sectors as real read errors by using the --dao option.

To avoid these problems, consider using the "DAO / Disc at once" (sometimes also called "SAO / Session at once") mode for writing single session media.

3.2 Program blocks right after invocation

Sometimes the program blocks right after the start and before any actions are carried out. It can not be terminated using Ctrl-C or "kill -9".

Investigations whether this is a bug in dvdisaster or a kernel problem are still running ;-)
In the mean time try the following: Eject the medium to make the program terminate. Insert the medium again and wait until the drive recognizes the medium and spins down. Calling dvdisaster again should work now.

3.3 What does "CRC error, sector: n" mean?

A checksum from the error correction file does not match the respective sector in the medium image. Some possible causes are:

  • The media image has been mounted with write permission and was therefore altered (typical evidence: CRC errors in sector 64 and in sectors 200 to 400).
  • The respective computer has some hardware problems.
If you suspect technical problems, try creating another version of the image and error correction files, and compare them again using the --test option. If the error persists in the same place, there might be a bug in dvdisaster. But if the error disappears or surfaces at a different location, then your computer is probably suffering from defective memory, broken drive cabling, or wrong CPU/system frequency settings.
Copyright 2004,2005 Carsten Gnörlich.
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