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dd_rescue is a dd tool with following features suitable for rescuing data from |
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Like dd, dd_rescue does copy data from one file or block device to another. |
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a medium with errors. |
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You can specify file positions (called seek and Skip in dd). |
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There are several differences: |
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- Don't abort on errors on the input file unless the user specify the maximum |
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- dd_rescue does not provide character conversions. |
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error number. |
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- The command syntax is different. Call dd_rescue -h. |
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- Don't truncate the output file. |
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- dd_rescue does not abort on errors on the input file, unless you specify |
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- Can use two different block sizes for normal operation and the case of errors. |
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a maximum error number. Then dd_rescue will abort when this number is reached. |
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- Can start from the end of the file and move backwards. |
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- dd_rescue does not truncate the output file, unless asked to. |
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- You can tell dd_rescue to start from the end of a file and move bcakwards. |
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- It uses two block sizes, a large (soft) block size and a small (hard) |
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block size. In case of errors, the size falls back to the small one and is |
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promoted again after a while without errors. |
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- It does not (yet) support non-seekable in- or output. |
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WWW: http://www.garloff.de/kurt/linux/ddrescue/ |
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WWW: http://www.garloff.de/kurt/linux/ddrescue/ |