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authorLars Wendler <polynomial-c@gentoo.org>2013-10-21 13:44:12 +0000
committerLars Wendler <polynomial-c@gentoo.org>2013-10-21 13:44:12 +0000
commit2170ae1c1ee3b26ddd4cb365978378ac1eb6b8a0 (patch)
treeb521d09f20d63556c0a3aad70f7c9bdb6893e528 /app-arch/lziprecover/metadata.xml
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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
+<pkgmetadata>
+ <maintainer>
+ <email>polynomial-c@gentoo.org</email>
+ <name>Lars Wendler</name>
+ </maintainer>
+ <longdescription lang="en">
+ 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 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.
+ 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.
+ 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 can print correct total file sizes and ratios even for
+ multi-member files.
+ 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.
+ 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 (a few MB) with small
+ errors (one sector damaged per copy), the probability approaches 100 percent
+ even with only two copies.
+ Lziprecover is not a replacement for regular backups, but a last line of
+ defense for the case where the backups are also damaged.
+ </longdescription>
+</pkgmetadata>