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| -rw-r--r-- | doc/lziprecover.info | 51 |
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diff --git a/doc/lziprecover.info b/doc/lziprecover.info index 73830cf..7b24dcb 100644 --- a/doc/lziprecover.info +++ b/doc/lziprecover.info @@ -12,7 +12,7 @@ File: lziprecover.info, Node: Top, Next: Introduction, Up: (dir) Lziprecover Manual ****************** -This manual is for Lziprecover (version 1.13, 24 February 2012). +This manual is for Lziprecover (version 1.14-rc1, 27 February 2013). * Menu: @@ -24,7 +24,7 @@ This manual is for Lziprecover (version 1.13, 24 February 2012). * Concept Index:: Index of concepts - Copyright (C) 2009, 2010, 2011, 2012 Antonio Diaz Diaz. + Copyright (C) 2009, 2010, 2011, 2012, 2013 Antonio Diaz Diaz. This manual is free documentation: you have unlimited permission to copy, distribute and modify it. @@ -132,7 +132,8 @@ The format for running lziprecover is: `-l' `--list' Print total file sizes and ratios. The values produced are correct - even for multi-member files. + even for multi-member files. Use it together with `-v' to see + information about the members in the file. `-m' `--merge' @@ -221,7 +222,12 @@ File: lziprecover.info, Node: File Format, Next: Examples, Prev: Invoking Lzi 3 File Format ************* -In the diagram below, a box like this: +Perfection is reached, not when there is no longer anything to add, but +when there is no longer anything to take away. +-- Antoine de Saint-Exupery + + + In the diagram below, a box like this: +---+ | | <-- the vertical bars might be missing +---+ @@ -250,15 +256,18 @@ additional information before, between, or after them. "LZIP". `VN (version number, 1 byte)' - Just in case something needs to be modified in the future. Valid - values are 0 and 1. Version 0 files are deprecated. They can - contain only one member and lack the `Member size' field. + Just in case something needs to be modified in the future. 1 for + now. `DS (coded dictionary size, 1 byte)' - Bits 4-0 contain the base 2 logarithm of the base dictionary size. - Bits 7-5 contain the number of "wedges" to substract from the base - dictionary size to obtain the dictionary size. The size of a wedge - is (base dictionary size / 16). + Lzip divides the distance between any two powers of 2 into 8 + equally spaced intervals, named "wedges". The dictionary size is + calculated by taking a power of 2 (the base size) and substracting + from it a number of wedges between 0 and 7. The size of a wedge is + (base_size / 16). + Bits 4-0 contain the base 2 logarithm of the base size (12 to 29). + Bits 7-5 contain the number of wedges (0 to 7) to substract from + the base size to obtain the dictionary size. Valid values for dictionary size range from 4KiB to 512MiB. `Lzma stream' @@ -272,9 +281,9 @@ additional information before, between, or after them. Size of the uncompressed original data. `Member size (8 bytes)' - Total size of the member, including header and trailer. This - facilitates safe recovery of undamaged members from multi-member - files. + Total size of the member, including header and trailer. This field + acts as a distributed index, and facilitates safe recovery of + undamaged members from multi-member files. @@ -399,13 +408,13 @@ Concept Index Tag Table: Node: Top231 -Node: Introduction900 -Node: Invoking Lziprecover2937 -Node: File Format7982 -Node: Examples9989 -Ref: ddrescue-example11207 -Node: Problems13038 -Node: Concept Index13588 +Node: Introduction910 +Node: Invoking Lziprecover2947 +Node: File Format8073 +Node: Examples10394 +Ref: ddrescue-example11612 +Node: Problems13443 +Node: Concept Index13993 End Tag Table |