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@@ -0,0 +1,34 @@ +Description + +Lziprecover is a data recovery tool and decompressor for files in the +lzip compressed data format (.lz) able to repair slightly damaged files, +recover badly damaged files from two or more copies, extract undamaged +members from multi-member files, decompress files and test integrity of +files. + +Lziprecover is able to recover or decompress files produced by any of +the compressors in the lzip family; lzip, plzip, minilzip/lzlib, clzip +and pdlzip. This recovery capability contributes to make the lzip format +one of the best options for long-term data archiving. + +When recovering data, lziprecover takes as arguments the names of the +damaged files and writes zero or more recovered files depending on the +operation selected and whether the recovery succeeded or not. The +damaged files themselves are never modified. + +When decompressing or testing file integrity, lziprecover behaves like +lzip or lunzip. + +If the files are too damaged for lziprecover to repair them, data from +damaged members can be partially recovered writing it to stdout. + +To give you an idea of its possibilities, when merging two copies each +of them with one damaged area affecting 1 percent of the copy, the +probability of obtaining a correct file is about 98 percent. With three +such copies the probability rises to 99.97 percent. For large files with +small errors, the probability approaches 100 percent even with only two +copies. + +If the cause of file corruption is damaged media, the combination +GNU ddrescue + lziprecover is the best option for recovering data from +multiple damaged copies. |