ddrescue - GNU ddrescue is a data recovery tool

Distribution: PCLinuxOS
Repository: PCLinuxOS x86_64
Package name: ddrescue
Package version: 1.21
Package release: 1pclos2017
Package architecture: x86_64
Package type: rpm
Installed size: 225.51 KB
Download size: 225.51 KB
Official Mirror: ftp.nluug.nl
GNU ddrescue is a data recovery tool. It copies data from one file or block device (hard disc, cdrom, etc) to another, trying hard to rescue data in case of read errors. The basic operation of ddrescue is fully automatic. That is, you don't have to wait for an error, stop the program, read the log, run it in reverse mode, etc. If you use the logfile feature of ddrescue, the data is rescued very efficiently, (only the needed blocks are read). Also you can interrupt the rescue at any time and resume it later at the same point. Automatic merging of backups: If you have two or more damaged copies of a file, cdrom, etc, and run ddrescue on all of them, one at a time, with the same output file, you will probably obtain a complete and error-free file. This is so because the probability of having damaged areas at the same places on different input files is very low. Using the logfile, only the needed blocks are read from the second and successive copies. The logfile is periodically saved to disc. So in case of a crash you can resume the rescue with little recopying. Also, the same logfile can be used for multiple commands that copy different areas of the file, and for multiple recovery attempts over different subsets. Ddrescue does not truncate the output file if not asked to. So, every time you run it on the same output file, it tries to fill in the gaps. Because ddrescue needs to read and write at random places, it only works on seekable (random access) input and output files. If your system supports it, ddrescue can use direct disc access to read the input file, bypassing the kernel cache. Ddrescue aligns its I/O buffer to the sector size so that it can be used for direct disc access or to read from raw devices. For efficiency reasons, also aligns it to the memory page size if page size is a multiple of sector size. Read the info file to learn how to use direct disc access or raw devices with ddrescue. Ddrescue is also able to selectively overwrite parts of the output file, which has a number of interesting uses like wiping data, marking bad areas or even, in some cases, "repair" damaged sectors.



  • ddrescue = 1.21-1pclos2017
  • ddrescue(x86-64) = 1.21-1pclos2017

    Install Howto

    1. Enable PCLinuxOS x86_64 repository in /etc/apt/sources.list:
      rpm http://ftp.nluug.nl/pub/os/Linux/distr/pclinuxos/pclinuxos/apt/ pclinuxos/64bit x86_64
    2. Update the package index:
      # apt-get update
    3. Install ddrescue rpm package:
      # apt-get install ddrescue