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██████╗ █████╗ ██████╗
██╔══██╗ ██╔══██╗ ██╔══██╗ RAR - What's new in the latest version
██████╔╝ ███████║ ██████╔╝ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
██╔══██╗ ██╔══██║ ██╔══██╗
██║ ██║ ██║ ██║ ██║ ██║
╚═╝ ╚═╝ ╚═╝ ╚═╝ ╚═╝ ╚═╝
Version 2.00 beta 3 for Unix
1. The switches -ierr and -ialt are implemented.
2. SFX and freeware UNRAR for Unix are released.
3. The file order list for solid archiving in file RARFILES.LST is
introduced. There you may set up the user-defined sorting order for
specific files or group of files. RARFILES.LST should be placed
in your HOME directory.
4. Minor bugfixing.
Version 2.00 beta 2
1. The general compression algorithm has been significantly improved:
Compression ratio and speed are both improved under normal
conditions and adapt better to available memory.
2. A special "multimedia" compression method has been added. It is
intended primarily to be used when compressing digital audio data
and graphics (true color bitmaps). An improvement in the
compression ratio, of up to 30%, can be expected over the normal
compression algorithm.
The use of multimedia compression is optional and may be switched
on by the "Use multimedia compression" item in the configuration
menu or by the command line switch -mm[f]. RAR performs intelligent
data analysis and uses the general compression algorithm when
multimedia compression provides no improvement. Optimum performance
occurs when different data types are combined in the same archive.
The switch -m<N> "Set compression method" may also be used with
multimedia compression.
When multimedia compression is required for the entire archive
(switch off data analysis when compressing certain multimedia
files), the -mmf switch may be used "Force Multimedia Compression".
3. The 32-bit versions of RAR 2.00 contains an option for changing the
size of the sliding dictionary created when files are compressed.
This may be set to 64Kb, 128Kb, 256Kb (default), 512Kb or 1Mb and
results in a corresponding (significant) decrease in the size of
the output archive, particularly when compressing large files. When
compressing using a large (more than 64Kb) sliding dictionary,
compression time will increase.
4. The RAR 2.00 version for Dos may be used to unpack archives created
with RAR 2.00 on other platforms where the sliding dictionary size
is greater than 64 Kb. As much memory (Conventional and EMS)
as possible should be made available to the Dos version of RAR when
unpacking archives created using a large sliding dictionary,
in order to improve unpacking speed. Archives created with a large
dictionary cannot be converted to SFX with the default SFX module
in the Dos version.
5. Password encryption has been improved.
6. A Data Recovery facility has been implemented. Optionally,
redundant information may be added to a RAR archive, incurring a
small penalty in archive size, which will help to recover archived
files in the case of floppy disk failure or other data losses. Use
the option "Put recovery record" in the configuration or the Alt-F6
key in RAR to place the redundant recovery information into a
created archive. The corresponding command lines switch is -rr[N],
where N is the number of redundant data sectors (1 to 8). Default
values are:
Archive size Number of RR-sectors
< 50Kb 2
50Kb-500Kb 4
> 500Kb 8
A damaged archive may be reconstructed using the "Repair" function
of RAR (Alt/F8 key combination in RAR or the command line option
"r"). The recovered archive will be named _RECOVER.RAR. If the old,
pre-2.00 repair procedure was used (without data recovery records)
or recovering was not completed, the reconstructed archive will be
named _RECONST.RAR.
The chance of successful archive reconstruction, using recovery
records, is very high if the size of the continuous portion of
damaged data is not greater than N*512 bytes, where N is number of
RR-sectors initially placed into the archive.
7. RAR 2.00 is compatible with previous releases and handles archives
created by older versions of RAR. The sole limitation of backward
compatibility: you will need the old external SFX module to convert
an old style archive to SFX or simply build it using RAR 1.5x.
Archives created with RAR 2.00 cannot be unpacked by older versions
of RAR.
8. The 32-bit versions of RAR 2.00 have a new feature "Set task priority
and sleep time". Use "General options" dialog in full-screen or the
switch - ri<P>[:<S>] on the command line to activate this option.
The possible task priority values are from 0 to 15. When <p> is equal
to 0, the default task priority is used, 1 corresponding to the lowest
task priority, 15 - to the highest.
The sleep time <s> is a value from 0 to 1000 (milliseconds). This is
the period of time that WinRAR will give back to Windows after every
read or write during the packing or unpacking operation. The sleep
time setting is useful when several tasks with the same priority are
running in the system.
9. Names of files produced by the 'R' command have been changed from
$RECOVER.RAR and $RECONST.RAR to _RECOVER.RAR and _RECONST.RAR
for better portability with future RAR/Unix with Unix shell.
10. In the console version commands 'V' and 'L' can be suplied with
the '-v' switch meaning "process all volumes starting from the
specified". If these commands cause processing more than one archive
(volume), total information concerning all archives will be shown.
11. The file order list for solid archiving in file RARFILES.LST is
introduced. There you may set up the user-defined sorting order for
specific files or group of files.
12. The bug detected, located in old portable version 1.01 of unRAR
source only, which caused CRC errors in some cases. If you are using
unRAR 1.01 to unpack old archives (created with RAR prior to version
2.00) then fix the problem applying the following patch:
Replace string 353 in the unpack.c:
if (Distance > D->MaxDist3)
Length++;
with:
if (Distance >= D->MaxDist3)
Length++;