From 4f2d7949f03e1c198bc888f2d05f421d35c57e21 Mon Sep 17 00:00:00 2001 From: V3n3RiX Date: Mon, 9 Oct 2017 18:53:29 +0100 Subject: reinit the tree, so we can have metadata --- app-arch/lziprecover/metadata.xml | 51 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 51 insertions(+) create mode 100644 app-arch/lziprecover/metadata.xml (limited to 'app-arch/lziprecover/metadata.xml') diff --git a/app-arch/lziprecover/metadata.xml b/app-arch/lziprecover/metadata.xml new file mode 100644 index 000000000000..1d78b6514ce5 --- /dev/null +++ b/app-arch/lziprecover/metadata.xml @@ -0,0 +1,51 @@ + + + + + polynomial-c@gentoo.org + Lars Wendler + + + mgorny@gentoo.org + Michał Górny + + + 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. + + -- cgit v1.2.3