35 lines
1.5 KiB
Text
35 lines
1.5 KiB
Text
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Description
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Lziprecover is a data recovery tool and decompressor for files in the
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lzip compressed data format (.lz) able to repair slightly damaged files,
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recover badly damaged files from two or more copies, extract undamaged
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members from multi-member files, decompress files and test integrity of
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files.
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Lziprecover is able to recover or decompress files produced by any of
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the compressors in the lzip family; lzip, plzip, minilzip/lzlib, clzip
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and pdlzip. This recovery capability contributes to make the lzip format
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one of the best options for long-term data archiving.
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When recovering data, lziprecover takes as arguments the names of the
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damaged files and writes zero or more recovered files depending on the
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operation selected and whether the recovery succeeded or not. The
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damaged files themselves are never modified.
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When decompressing or testing file integrity, lziprecover behaves like
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lzip or lunzip.
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If the files are too damaged for lziprecover to repair them, data from
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damaged members can be partially recovered writing it to stdout.
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To give you an idea of its possibilities, when merging two copies each
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of them with one damaged area affecting 1 percent of the copy, the
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probability of obtaining a correct file is about 98 percent. With three
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such copies the probability rises to 99.97 percent. For large files with
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small errors, the probability approaches 100 percent even with only two
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copies.
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If the cause of file corruption is damaged media, the combination
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GNU ddrescue + lziprecover is the best option for recovering data from
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multiple damaged copies.
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