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| -rw-r--r-- | README | 15 |
1 files changed, 7 insertions, 8 deletions
@@ -6,6 +6,9 @@ files, produce a correct file by merging the good parts of two or more damaged copies, extract data from damaged files, decompress files and test integrity of files. +Lziprecover is not a replacement for regular backups, but a last line of +defense for the case where the backups are also damaged. + The lzip file format is designed for data sharing and long-term archiving, taking into account both data integrity and decoder availability: @@ -43,12 +46,11 @@ If a file is too damaged for lziprecover to repair it, all the 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 -the desired data. +Lziprecover provides random access to the data in multimember files; it +only decompresses the members containing the desired data. Lziprecover can print correct total file sizes and ratios even for -multi-member files. +multimember files. When recovering data, lziprecover takes as arguments the names of the damaged files and writes zero or more recovered files depending on the @@ -66,16 +68,13 @@ few MB) with small errors (one sector damaged per copy), the probability approaches 100 percent even with only two copies. (Supposing that the errors are randomly located inside each copy). -Lziprecover is not a replacement for regular backups, but a last line of -defense for the case where the backups are also damaged. - The lziprecover package also includes unzcrash, a program written to test robustness to decompression of corrupted data, inspired by unzcrash.c from Julian Seward's bzip2. Type 'make unzcrash' in the lziprecover source directory to build it. Then try 'unzcrash --help'. -Copyright (C) 2009-2015 Antonio Diaz Diaz. +Copyright (C) 2009-2016 Antonio Diaz Diaz. This file is free documentation: you have unlimited permission to copy, distribute and modify it. |