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This manual is for GNU ddrescue (version 1.30, 1 January 2026).

Copyright © 2004-2026 Antonio Diaz Diaz.

This manual is free documentation: you have unlimited permission to copy, distribute, and modify it.

• Introduction
• Basic concepts
• Using ddrescue safely
• Algorithm
• Meaning of ddrescue’s screen output
• Invoking ddrescue
• Syntax of command-line arguments
• Mapfile structure
• Saving the mapfile in case of trouble
• Copying CD-ROMs and DVDs
• A small tutorial with examples
• Direct disc access
• Copying parts of the input file on demand
• Fill mode
• Generate mode
• Ddrescuelog
• Invoking ddrescuelog
• Reporting bugs
• Concept index