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| -rw-r--r-- | README | 31 |
1 files changed, 21 insertions, 10 deletions
@@ -5,25 +5,36 @@ lzip compressed data format (.lz), able to repair slightly damaged files, recover badly damaged files from two or more copies, extract data from damaged files, decompress files and test integrity of files. -The lzip file format is designed for long-term data archiving. It is -clean, provides very safe 4 factor integrity checking, and is backed by -the recovery capabilities of lziprecover. +The lzip file format is designed for long-term data archiving, taking +into account both data integrity and decoder availability: + + * The lzip format provides very safe integrity checking and some data + recovery means. The lziprecover program can repair bit-flip errors + (one of the most common forms of data corruption) in lzip files, + and provides data recovery capabilities, including error-checked + merging of damaged copies of a file. + + * The lzip format is as simple as possible (but not simpler). The + lzip manual provides the code of a simple decompressor along with a + detailed explanation of how it works, so that with the only help of + the lzip manual it would be possible for a digital archaeologist to + extract the data from a lzip file long after quantum computers + eventually render LZMA obsolete. + + * Additionally lzip is copylefted, which guarantees that it will + remain free forever. 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. -Lziprecover makes lzip files resistant to bit-flip (one of the most -common forms of data corruption), and can safely merge multiple damaged -backup 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. If a file is too damaged for lziprecover to repair it, all the -recoverable data in all members of the file can be extracted with the -'-D' option. +recoverable data in all members of the file can be extracted in one step +with the '-D' option. Lziprecover is able to efficiently extract a range of bytes from a multi-member file, because it only decompresses the members containing @@ -56,7 +67,7 @@ unzcrash.c from Julian Seward's bzip2. Type 'make unzcrash' in the lziprecover source directory to build it. Then try 'unzcrash --help'. -Copyright (C) 2009, 2010, 2011, 2012, 2013 Antonio Diaz Diaz. +Copyright (C) 2009, 2010, 2011, 2012, 2013, 2014 Antonio Diaz Diaz. This file is free documentation: you have unlimited permission to copy, distribute and modify it. |