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Versie historie van WinRAR (Nederlands)

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Veranderingen voor v5.80 - v5.90

RAR Compression Speed Enhancements
More and more multi-core CPUs with 16 or more cores are released and installed on users’ PCs, and with the new WinRAR 5.90 version, these CPU improvements can dramatically increase the RAR compression speed in such environments. This optimization of the RAR5 compression speed, with the normal and fastest method, will provide a higher ratio on all CPUs and work even faster on high-core-count CPUs with 16 or more cores. In addition, it increases the maximum number of used threads from 32 to 64. For command-line users, the -mt switch now accepts values of 1 to 64.
Wide Format Support
WinRAR is the best choice for handling compressed formats such as RAR, ZIP, CAB, ARJ, TAR, 7-zip and many more. To continue to support a wide range of compression formats, we have also added extraction support for GZIP archives with an optional header checksum field.
Usability Enhancements
WinRAR now displays packed and unpacked folder sizes when browsing in the archive contents. Also, the user can now resize archiving and extraction progress windows and some other progress windows.
The repair feature of RAR5 archives with recovery records and without data shifts has been improved compared to previous versions. It is now possible to repair RAR5 archives with encrypted file names without providing a password, but the user still requires the password to open the repaired archive!

Veranderingen voor v5.71 - v5.80

1. "Preserve source files last access time" option on "Time" page
of archiving dialog permits to preserve the original last access time
of archiving files.
2. Command line -tsp switch can be used to preserve the original
last access time of archiving files. It can be combined with other
-ts switches, like: rar a -tsc -tsp arcname files
3. It is allowed to combine several modifiers in the same -ts switch.
For example, we can use -tscap instead -tsc -tsa -tsp.
4. WinRAR can read default values of command line switches from rar.ini
text file, which can be stored either in the same folder as WinRAR.exe
or in %APPDATA%\WinRAR folder. This file includes strings in following
format:
switches=
switches_=
First applies switches to all and second to individual commands.
For example:
switches=-m5 -s
switches_x=-o+
Most of switches specified in rar.ini are used only in the command line
mode. Some switches can be applicable both in shell and in command line
modes. Previously this rar.ini format was supported only by console RAR.
5. Command line -agf switch specifies the default format
string for -ag switch. It has a practical value only if placed to
rar.ini configuration file or to RAR environment variable.
For example, if we set RAR environment variable to -agfYYYY-MMM-DD,
we can use -ag without a parameter with YYYY-MMM-DD format string
assumed.
6. Switches -ed and -e+d can be used in archive processing commands
for any combination of RAR and archive operating systems.
In older versions RAR for Windows could not use them for Unix RAR
archives also as RAR for Unix for Windows RAR archives.
7. Previously "Test" command failed to check integrity of archived NTFS
alternate data streams and issued "Unknown data header format" warning
if size of such stream exceeded 16 MB. This limitation is removed now.
8. Archiving speed for large NTFS alternate data streams on multi-core
CPUs is increased.
9. "Find" command:
a) when extracting encrypted files directly from "Search results"
dialog, password prompt was issued for every found file
even if all files belonged to same archive.
Now password is requested only once per archive;
b) Ctrl+A hotkey selects all files in "Search results".
10. Archive comment window:
a) previous versions did not allow to use Ctrl+W shortcut to close
WinRAR when comment window had keyboard focus. Now Ctrl+W works
also from comment window;
b) mouse wheel is supported also for comments with ANSI Escape sequences;
c) for some lenghty comments with ANSI Escape sequences last line
of comment was visible only partially even after scrolling up to
bottom. It is displayed comletely now.
11. Maximum path length for files in 7z archives is increased up to
2048 characters. While such lengthy paths were already supported
for RAR and ZIP formats, previous versions limited the path length
to 260 characters for 7z archives.
12. If archive or file name is too lengthy to fit to archiving
or extraction progress window, it is truncated. Previously such names
were truncated at the end, making the file extension invisible.
This version truncates them removing the path component and symbols
in the middle, but preserving beginning of file name and file extension.
13. If files selected for archiving differ only by extension,
a proposed archive name is based on their name part.
For example, archiving dialog will propose Readme.rar if we selected
Readme.txt and Readme.doc.
Previous versions always generated the archive name based on parent
folder name for several selected files.
14. "Symlink" and "Hardlink" is diplayed in "Type" column for symlink
and hardlink records in .tar archives. Previous versions displayed
a proper type for such records only in .rar archives.
15. Copying and pasting files from large archives could fail if
extraction took a lot of time. This version can paste files from
such archives as well, but we have to start extraction already on
"Copy" command and not on "Paste" to achieve this.
16. Similarly to RAR5 volumes, recovery volumes in RAR4 format use
the same width of volume number field as corresponding RAR volumes.
While previously WinRAR could create arc.part01.rar and arc.part1.rev
in RAR4 format, now both types of volumes will use "part01".
17. "Set font..." button in "Settings/File list" also changes the folder
tree panel font. Previously it changed only the file list font.
18. "Find files" and command line mode "i" commands:
a) if "Use all tables" option or "t" modifer of "i" command are used,
additionally to already supported ANSI, OEM and UTF-16 encodings
WinRAR will search the specified string in UTF-8 files as well;
b) better support for Unicode text strings;
c) better performance, especially for case insensitive search;
d) hexadecimal search output includes both text and hexadecimal
representation of found matches.
19. File and total progress bar is displayed when unpacking
tar.bz2, tar.gz, tar.lz, tar.xz, tar.z archives.
Previously only the total progress was displayed properly for tar.bz2,
tar.gz and tar.z. Neither file nor total progress was displayed
for tar.lz and tar.xz.
20. "File list/Files/Exact sizes" option also changes the file size format
in WinRAR status bar.
21. Bugs fixed:
a) if non-existent path is specified in archive name in archiving
dialog, WinRAR proposes to create such path. Previous versions
could create such path in WinRAR start-up folder instead of
currently displayed folder;
b) WinRAR could crash when adding the recovery record in RAR5 format
on CPUs not supporting CPUID EAX=7 command and returning random
data in response. These are some CPUs from early 2000s;
c) WinRAR failed to create archives after dragging files with
right mouse button in Windows shell, dropping them to another folder,
selecting "Add to archive..." in context menu and enabling
"Put each file to separate archive" option;
d) "winrar r *.zip" command repaired only the first ZIP archive
in the set if all archives had numeric names like 1.zip, 2.zip
and signatures in the beginning of archives were missing;
e) previous WinRAR version failed to unpack folder records
in archives created by RAR 1.50;
f) in rare cases WinRAR failed to extract and reported an error
for valid .gz archives produced by some compression optimization
tools;
g) progress bar in tray icon never reached 100% in high DPI mode;
h) creation and last access time was not displayed for archived folders
if folder records were stored in archive after folder contents;
i) "Skip encrypted archives" option in "Convert archives" command
did not work for 7-Zip archives with headers encryption.

Veranderingen voor v5.60 - v5.61

"Delete archive" extraction option deletes all volumes even if user started extraction from non-first RAR volume, but first volume is present and all files are unpacked successfully. In such case previous versions ignored "Delete archive" even if WinRAR was able to locate the first volume and process the volume set from beginning.
Compression ratio bar is not displayed on "Archive" page of Explorer file properties for archives with encrypted file names. WinRAR cannot reliably calculate it for such archives without a password and previously it just displayed 0% here.
Bugs fixed:
WinRAR displayed "The specified password is incorrect" message infinitely when attempting to open RAR5 archive with encrypted file names if wrong global password was set with Ctrl+P;
memory management bug in the password dialog could lead to access to already freed memory followed by crash. This issue may be also associated with security risks;
fixed crashes in corrupt RAR, ACE and LZH archives. This issue may be also associated with security risks;
while starting, WinRAR could cause a brief flickering in menu bars of few other applications;
WinRAR "Find" command matched "String to find" against all archived files ignoring "File names to find" mask when searching in CAB archives;
SFX module "License" command did not set a title of license window;
if "Start-up folder" in WinRAR settings included the trailing backslash, WinRAR ignored first "Up one level" command

Veranderingen voor v5.30 - v5.31

1. Following issues are corrected in Windows high DPI mode:
a) if text size in Windows settings was set to 150% or larger, the font size in WinRAR help was not increased accordingly, resulting in too small text;
b) default columns width in WinRAR file list was less than expected for 125% or larger Windows text setting.
2. Interface improvements for right to left languages:
a) proper text alignment in simple WinRAR prompts, such as confirmations to delete archived files or to clear the log file;
b) "OK", "Cancel", "Help" buttons in multi-page dialogs, such as archiving and extraction options or WinRAR settings, are aligned correctly and translated to default Windows display language.
3. Bugs fixed:
a) WinRAR SFX module could load DLL libraries from its own executable folder as a result of calling some Windows API functions.
It could lead to security threat if DLL files with malicious code were stored in the same folder as SFX archive. Now SFX module takes additional steps to prevent such situation in Windows Vista and newer.
Be aware that users without latest Windows security patches installed also as Windows XP users still can be affected, so they must be especially careful to run SFX archive from a folder without suspicious DLL files;
b) WinRAR 5.30 failed to run .lnk files from file list.

Veranderingen voor v5.20 Beta 3 - v5.21

1. "Drag and drop context menu" options in "Settings/Integration/ Context menu items" dialog allow to disable WinRAR archiving and extraction commands in context menu displayed after dragging and dropping files with right mouse button.
2. If winrar.ini file is present in the same folder as WinRAR installer, winrar.ini will be copied to WinRAR program folder after completing installation.
3. While previous versions could produce RAR5 volumes of slightly smaller than requested size sometimes, such situation is less likely now. In most cases volume size equals to specified by user.
4. Now by default WinRAR skips symbolic links with absolute paths in link target when extracting. You can enable creating such links with "Allow absolute paths in symbolic links" option on "Advanced" page of extraction dialog or with -ola command line switch.
Such links pointing to folders outside of extraction destination folder can present a security risk. Enable their extraction only if you are sure that archive contents is safe, such as your own backup.
5. Bugs fixed:
a) WinRAR 5.20 issued unnecessary user account control (UAC) prompt, when running an executable from archive stored in UAC protected folder. Since nothing is extracted to folder containing an archive in such case, UAC prompt is not needed;
b) WinRAR could overwrite files with read-only attribute only when unpacking RAR and ZIP archive formats. Now it is also implemented for other archive formats supported by WinRAR;
c) "Elapsed time" and "Time left" were displayed incorrectly when applying "Convert" command to multiple archives and enabling "Add recovery record" option.

Veranderingen voor v5.10 - v5.20 Beta 3

Bugs fixed:
"Extract relative paths" option was ignored and full pathname was created when extracting a file from ZIP archive to a folder protected with user account control (UAC);
if encrypted archived file was opened in external editor, modified and saved, previous beta stored this file back to archive without encryption.

Veranderingen voor v5.01 - v5.10

Added extraction support for ZIP and ZIPX archives using BZIP2, LZMA and PPMd compression.
Added extraction support for 7z split archives (.7z.001, .7z.002, ...).
Added support for AES-NI CPU instructions allowing to improve RAR encryption and decryption performance.
Default theme images are scaled up with better quality in high DPI display mode.
Environment variables, such as %temp%, can be used in "Files to add" field of archiving dialog.
Switch -ai can be used when creating RAR archive, so predefined values, typical for file and folder, are stored instead of actual attributes.

Veranderingen voor v5.01 - v5.10 Beta 1

Added extraction support for ZIP and ZIPX archives using BZIP2, LZMA and PPMd compression.
Added extraction support for 7z split archives (.7z.001, .7z.002, ...).
Added support for AES-NI CPU instructions allowing to improve RAR encryption and decryption performance.
Default theme images are scaled up with better quality in high DPI display mode.
Environment variables, such as %temp%, can be used in "Files to add" field of archiving dialog.
Switch -ai can be used when creating RAR archive, so predefined values, typical for file and folder, are stored instead of actual attributes. Previously this switch could be used only when extracting.

Veranderingen voor v5.00 - v5.01

1. RAR 5.0 archives can include an optional quick open information controlled with -qo[-|+] switch or "Quick open information" options group in archiving dialog. It allows to open the archive contents in WinRAR faster.
This version provides better update performance for archives containing both quick open information and service records, such as NTFS file security. Also default parameters of quick open information are optimized to achieve faster open time for such archives.
2. Bugs fixed:
a) "Find" command could fail when searching text string in .7z archives;
b) when opening RAR 5.0 archive with encrypted file names stored in another such archive, WinRAR could issue an erroneous message that password is incorrect. It happened only if passwords to inner and outer archives were different. It did not affect extraction, all files could be unpacked regardless of this message;
c) option "Use for all archives" in password dialog did not suppress additional password requests for RAR 5.0 archives with encrypted file names;
d) WinRAR address bar did not process correctly environment variable based paths, such as %temp%;
e) storing NTFS file security and alternate data streams did not work for file pathnames longer than 260 characters;
f) "Test" command could erroneously report damaged data in valid recovery record if only a part of files in RAR 5.0 archive was tested. It did not happen if entire archive contents was tested;
g) "Test" command erroneously reported errors when verifying RAR 4.x Unix symbolic links;
h) WinRAR "View" command did not work for files inside of BZIP2 archives;
i) if "High precision modification time" option in archiving dialog was turned off, WinRAR did not store the modification time at all instead of storing a lower precision time;
j) destination paths containing .\ or ..\ component did not work when extracting non-RAR archives in WinRAR command line mode;
k) WinRAR failed to unpack multivolume CAB archives.

Veranderingen voor v5.00 - v5.01 Beta 1

1. RAR 5.0 archives can include an optional quick open information controlled with -qo[-|+] switch or "Quick open information" options group in archiving dialog. It allows to open the archive contents in WinRAR faster.
This version provides better update peformance for archives containing both quick open information and service records, such as NTFS file security. Also default parameters of quick open information are optimized to achieve faster open time for such archives.
2. Bugs fixed:
a) "Find" command could fail when searching text string in .7z archives;
b) when opening RAR 5.0 archive with encrypted file names stored in another such archive, WinRAR could issue an erroneous message that password is incorrect. It happened only if passwords to inner and outer archives were different. It did not affect extraction, all files could be unpacked regardless of this message;
c) option "Use for all archives" in password dialog did not suppress additional password requests for RAR 5.0 archives with encrypted file names;
d) WinRAR address bar did not process correctly environment variable based paths, such as %temp%;
e) storing NTFS file security and alternate data streams did not work for file pathnames longer than 260 characters;
f) "Test" command could erroneously report damaged data in valid recovery record if only a part of files in RAR 5.0 archive was tested. It did not happen if entire archive contents was tested;
g) "Test" command erroneously reported errors when verifying RAR 4.x Unix symbolic links;
h) WinRAR "View" command did not work for files inside of BZIP2 archives;
i) if "High precision modification time" option in archiving dialog was turned off, WinRAR did not store the modification time at all instead of storing a lower precision time;
j) destination paths containing .\ or ..\ component did not work when extracting non-RAR archives in WinRAR command line mode;
k) WinRAR failed to unpack multivolume CAB archives.

Veranderingen voor v4.20 - v5.00

1. New RAR 5.0 archiving format. You can use "RAR 5.0" option in archiving dialog or -ma command line switch to create RAR 5.0 archives.
Older software including older WinRAR versions is not able to decompress RAR 5.0 archives, so if you plan to send an archive to other people, it is necessary to take the compatibility issue into consideration. You can select "RAR" instead of "RAR5" option in archiving dialog to create RAR 4.x archives compatible with previous WinRAR versions.
2. Changes in RAR 5.0 compression algorithm:
a) maximum compression dictionary size is increased up to 1 GB in 64 bit WinRAR. 32 bit WinRAR version can use up to 256 MB dictionary when creating an archive. Both 32 bit and 64 bit versions can unpack archives with any dictionary size, including 1 GB;
b) default dictionary size for RAR 5.0 is 32 MB, typically resulting in higher compression ratio and lower speed than RAR 4.x 4 MB. You can use "Dictionary size" archiving dialog option or -md switch to change this value;
c) -md switch syntax is modified to support larger dictionary sizes. Append 'k', 'm' and 'g' modifiers to specify the size in kilo-, mega- and gigabytes, like -md64m for 64 MB dictionary. If modifiers are not present, megabytes are assumed, so -md64m is equal to -md64;
d) RAR 5.0 format includes Intel IA-32 executable and delta compression algorithms, but RAR 4.x text, audio, true color and Itanium algorithms are not supported. These excluded algorithms are not efficient for modern data types and hardware configurations;
e) RAR 5.0 decompression can utilize several CPU cores. Though not to same extent as in compression algorithm, it improves the decompression speed on large files with poorly compressible data or when using BLAKE2 checksums.
3. Changes in RAR 5.0 archive format:
a) file times are stored as Coordinated Universal Time (UTC) instead of former local time, making file exchange among several time zones more straightforward;
b) file names and archive comments use UTF-8 encoding.
4. RAR 5.0 recovery record is based on Reed-Solomon error correction codes. If recovery record size is large enough, 5% and more, the new error correction scheme provides much higher resistance to multiple damages comparing to RAR 4.x recovery record. Smaller record, such as 1 - 2%, or less random damage type would result in less difference between 4.x and 5.0. For single continuous damage 4.x and 5.0 efficiency is about the same.
Additionally to usual data erasures, the new recovery record is able to detect deletions and insertions of much larger size than in previous RAR versions. Maximum insertion size is several megabytes. Maximum deletion size depends on the damage type and in some cases can be as large as the recovery record size.
Still, the best recovery performance and efficiency is achieved if no deletions and insertions are present, so all data including damaged sectors preserve their original positions. Thus, if you use some special software to copy an archive from damaged media, it is better to choose the mode, when damaged sectors are filled by zeroes or any other data instead of cutting them out completely from resulting file.
RAR 5.0 recovery record is more resistant to damage of recovery record itself and can utilize a partially corrupt recovery record data. Note, though, that "Repair" command does not fix broken blocks in recovery record. Only file data are corrected. After successful archive repair, you may need to create a new recovery record for saved files.
New recovery record is not based on 512 byte sectors anymore and incorporates more complicated data structures. So it is impossible to specify its size in sectors. For RAR 5.0 archives the parameter of -rr[N] switch and rr[N] command is always treated as a percent of archive size regardless of presence of % character. Typically N% recovery record can repair up to N% of continuously damaged data and increases the archive size by only slightly more than N%. Ability to fix multiple damages is proportional to N.
We used "Screaming Fast Galois Field Arithmetic Using Intel SIMD Instructions" paper by James S. Plank, Kevin M. Greenan and Ethan L. Miller to improve Reed-Solomon coding performance. Also we are grateful to Artem Drobanov and Bulat Ziganshin for samples and ideas allowed to make Reed-Solomon coding more efficient.
5. "Test" command verifies validity of RAR 5.0 recovery record. Recovery record is tested after processing all archived files.
If corrupt archive contains the recovery record, it might be possible to repair it even if recovery record validity test is failed. "Repair" command attempts to utilize even a partially damaged recovery record. So treat the negative recovery record test result as a reason to re-create the archive if original files are still available, but not as a reason to avoid "Repair" command.
6. Changes in RAR 5.0 encryption algorithm:
a) encryption algorithm is changed from AES-128 to AES-256 in CBC mode. Key derivation function is based on PBKDF2 using HMAC-SHA256;
b) special password verification value allows to detect most of wrong passwords without necessity to unpack the entire file;
c) if archive headers are not encrypted ("Encrypt file names" option is off), file checksums for encrypted RAR 5.0 files are modified using a special password dependent algorithm, to make impossible guessing file contents based on checksums. Do not expect such encrypted file checksums to match usual CRC32 and BLAKE2 values.
7. RAR 5.0 archives allow to utilize 256 bit length BLAKE2sp hash ( https://blake2.net ) instead of 32 bit CRC32 as a file checksum. Enable "Use BLAKE2 file checksum" option in "Options" page of archiving dialog or specify -htb command line switch to use BLAKE2 checksums.
While producing slightly larger archives, BLAKE2 can be used for file contents identification. If two files have the same BLAKE2 value, it practically guarantees that file contents is the same. BLAKE2 error detection property is also stronger than in much shorter CRC32.
8. Features removed:
a) authenticity verification feature did not provide the required level of reliability and was removed;
b) switch -en (do not add "end of archive" block) is not supported by RAR 5.0 archives, which always have the end of archive block. This block helps WinRAR to safely skip external data like digital signatures appended to archive;
c) old style extension based arcname.rNN volume names are not supported by RAR 5.0 archives, which use only arcname.partN.rar volume names;
d) file comments are not supported anymore both in RAR 4.x and RAR 5.0 archives. Console RAR 'cf' command is removed. It does not affect the archive comment support, which is present in both versions of archive format and is not planned for removal.
9. "Set password" command and "Dictionary size" option are moved to "General" page of archiving dialog.
10. You can use "Save symbolic links as links" option on "Advanced" page of archiving dialog to save and restore NTFS symbolic links and reparse points as links, so their contents is not archived. Command line equivalent of this option is -ol switch.
Similar option for NTFS hard links is "Save hard links as links". Its command line equivalent is -oh switch.
Both options are available only for RAR 5.0 archive format.
11. Added extraction only support for XZ archive format.
12. Changes in recovery volume processing in RAR 5.0 archive format:
a) maximum number of RAR+REV volumes in RAR 5.0 format is 65535 instead of 255;
b) recovery volume operations are faster than in RAR 4.x;
c) additionally to recovery data, RAR 5.0 REV files also store service information such as checksums of protected RAR files. So they are slightly larger than RAR volumes which they protect. If you plan to copy individual RAR and REV files to some removable media, you need to take it into account and specify RAR volume size by a few kilobytes smaller than media size.
13. Maximum path length for files in RAR and ZIP archives is increased up to 2048 characters.
14. Command line RAR returns the exit code 11 if it can detect that user entered a wrong password. This code can be returned only for RAR 5.0 archives. It is impossible to distinguish a wrong password and data damage for RAR 4.x archives.
15. 'v' and 'l' commands display archived file names in the end of line, not in that beginning as before. Also some fields previously available in 'l' and 'v' output are now shown only by 'lt' and 'vt'.
'vt' and 'lt' commands provide the detailed multiline information for every archived file.
'vta' and 'lta' also include service headers into list.
16. Now the default charset for filelists in commands like 'rar a arcname @filelist' is ANSI for both WinRAR and console RAR. In previous versions it was ANSI for WinRAR and OEM for console RAR. You can use -scl switch to override this default.
17. Internal WinRAR viewer can detect and display files in UTF-8 and UTF-16 little endian encodings.
18. UTF-16 little endian encoding is used in RAR and WinRAR log file rar.log, so Unicode file names are stored in the log correctly. WinRAR automatically truncates the old rar.log file in non-Unicode format to avoid mixing different encoding in the same log file. In case of console RAR you need to delete the old rar.log manually, otherwide RAR will append UTF-16 messages to existing rar.log.
You can use -scg switch to change the default log file encoding, such as -scag for ANSI encoding.
19. Command line 'r' (repair) command can include an optional destpath\ parameter defining the destination folder for repaired archive: rar r archive.rar destpath\

Veranderingen voor v4.20 - v5.00 Beta 8

1. WinRAR treats files with .txz extension as .tar.xz archives.
2. If 7-Zip archive extraction is cancelled, WinRAR deletes the incompletely extracted file. Previous versions did not delete it.
3. Bugs fixed:
a) solid archive updating was aborted for archives contaning BLAKE2 checksums;
b) folder tree panel did not allow to go to the archive root folder;
c) "Reuse existing window" option did not work if first WinRAR copy was browsing an archive and second WinRAR copy attempted to open another archive in another folder;
d) "Advanced compression parameters" dialog settings format in Registry was incompatible with WinRAR 4.20.

Veranderingen voor v4.11 - v4.20

1. Changes in RAR compression:
a) RAR general compression algorithm is optimized for better utilization of several processor cores. While some speed gain is possible even in single processor mode, best results are achieved in multi-core environment. Speed gain depends on data type and average file size. Several cores are utilized more efficiently when compressing large files.
b) we had to increase memory requirements to achieve higher compression speed. General RAR compression algorithm allocates about 120 MB comparing to 40 MB in WinRAR 4.11;
c) RAR text compression algorithm cannot utilize several CPU cores efficiently, so its performance in multiprocessor environment is much lower than for general algorithm. Also its decompression speed is much lower than in general algorithm regardless of CPU number. So we decided to disable the text algorithm by default. If you need maximum possible compression ratio for plain text data regardless of speed, you can enable the text compression in "Advanced compression parameter" dialog. Press "Compression..." button on "Advanced" page of archiving dialog to access it. You can also change this option permanently in default compression profile; In the command line mode the text compression can be enabled with -mct switch;
d) "Fastest" (-m1) compression mode also supports several processor cores now. In 4.11 it could use only a single processor core.
2. RAR general decompression algorithm speed is slightly improved, though not to same extent as RAR compression. RAR decompression is not able to use several processor cores, so its performance does not depend on a number of cores.
3. Changes in ZIP compression:
a) now ZIP compression supports several processor cores resulting in noticeably higher performance in multi-core environment. Single CPU ZIP compression is also faster than in 4.11;
b) memory use for ZIP compression is increased to about 15 MB.
4. Recovery volume creating and processing can use several CPU cores resulting in higher speed. Though, typically hard drive seek speed is a limiting factor for recovery volumes, so this gain is most noticeable when working with solid state drive.
5. Now the allowed value for -mt switch is 1 - 32, not 0 - 16 as before.
6. "Find files" command can search data in 7-Zip archives. Previously "Find files" did not support .7z archive format.
7. Windows 2000 is not supported by WinRAR and WinRAR self-extracting modules anymore.
8. "Save current settings" button in "Advanced SFX options" dialog is now available only when converting an existing archive to SFX. Options saved with this button are applied only to convert to SFX operation. If you create or update SFX archive, only SFX options stored in default compression profile are used. Options saved in "Advanced SFX options" dialog are ignored for these operations.

Veranderingen voor v4.11 - v4.20 Beta 3

1. "Estimate" function in WinRAR "Info" command is adjusted to faster WinRAR 4.20 compression when calculating the expected compression time.
2. GUI SFX module -sp switch passes parameters to setup application only if no other parameters were specified in "Setup" command in SFX script. So "Setup" command has a higher priority than -sp.
Regardless of -sp presence, setup application can read the full SFX command line from sfxcmd environment variable.
3. "Save current settings" button in "Advanced SFX options" dialog is now available only when converting an existing archive to SFX. Options saved with this button are applied only to convert to SFX operation.
If you create or update SFX archive, only SFX options stored in default compression profile are used. Options saved in "Advanced SFX options" dialog are ignored for these operations.

Veranderingen voor v4.10 - v4.11

1. Bugs fixed:
a) WinRAR did not store NTFS "Compressed" attribute, when creating RAR archives;
b) WinRAR crashed in command line mode if @filelist parameter was present and 'filelist' did not exist. This bug affected only WinRAR.exe, not RAR.exe;
c) if -x*\somefolder\* exclusion mask was specified when archiving and if name of current folder contained 'somefolder', WinRAR excluded all files and stopped creating an archive;
d) GUI self-extracting archives did not work in Windows Preinstallation Environment (Windows PE).

Veranderingen voor v4.01 - v4.10

WinRAR can create ZIP archives of practically any size.
2 GB archive size and 65535 file number ZIP limitations of previous WinRAR versions are not valid anymore.
WinRAR can create multivolume ZIP archives, which are also known as split ZIP files.
ZIP volumes have names like 'volname.zip', 'volname.z01', 'volname.z02'. Use a volume with ".zip" file extension in all archive processing operations like starting extraction or opening an archive.
Unlike RAR volumes, ZIP volumes cannot be self-extracting.
WinRAR needs to have access to all ZIP volumes of multivolume file set at the same time, when creating or unpacking them. So it is impossible to create or unpack ZIP volumes on removable disks, one volume per disk. You need to create them all in the same folder.
Added the high precision file time support in ZIP archives. WinRAR can store and extract modification, creation and last access file time in ZIP archives with 100 nanosecond precision.
You need to set "High precision modification time" option in "Time" part of archiving dialog to store all 3 times in archive. Set appropriate "File time" options in "Advanced" part of extraction dialog to choose times to extract.
Added support for Unicode names stored in ZIP extra field data. Different ZIP tools store Unicode names either in file header or in ZIP extra field and now WinRAR can correctly process both types of Unicode names.
"Synchronize archive contents" option and -as command line switch are supported in ZIP format.
Modifications of switch -ag behavior:
a) -ag can be used with all RAR and WinRAR commands, not just with archiving only;
b) 'N' format character behavior differs in archiving and non-archiving operations. When archiving, it is incremented until the first unused name is found. In non-archiving operations like extracting it selects the existing archive preceding the first unused name;
c) 'I' format character allows to specify minutes regardless of presence and position of 'H' (hours) in format string. It can be used instead of 'M' (minutes), when you wish to place minutes before hours or do not need hours at all.
By default, WinRAR proposes to update an archive if viewer modified an opened file or created any new files. New "Ignore modifications for" option in "Settings/Viewer" dialog allows to disable such behavior. You can enter one or several file masks separated by spaces here and WinRAR will not prompt to update an archive if file created or modified by viewer matches one of these masks.
Changes in volume size input field. Now you can select size units in the drop down list to the right of volume size. Previous way to define size modifiers, by entering 'k', 'm', etc. character after the numeric size value, is also supported.
Changes in "Predefined sizes" in "Define volume sizes" dialog. Floppies and ZIP disks are replaced by 5 MB and 100 MB volumes, added new entries for maximum FAT32 file size and for Blu-ray disks.
New "Wipe files if password is set" option in "Options" page of archiving dialog. If you prefer to always delete encrypted files securely, you can enable "Wipe files if password is set" in the default compression profile.
New "Wipe temporary files/Encrypted only" option in "Settings/Security". It allows to use a slower and more secure delete for temporary files extracted from archives identified by WinRAR as encrypted. Quick delete is used for all other temporary files.
Changes in "Convert archives" command:
a) now it is possible to convert encrypted archives. Previously "Convert archives" command skipped them. Though, if you still prefer to skip them, you can do it by enabling "Skip encrypted archives" option in "Convert archives" dialog. It might be useful if you wish to run the conversion command in unattended mode, avoiding password prompts;
b) special "rar2" archive type, which was specific for RAR 1.x and 2.x archives, is removed. Now "rar" archive type controls conversion of all versions of RAR archives.
Since the convert command does not need to detect RAR archive version anymore, the initial search for archives is performed faster, resulting in shorter delay before displaying "Convert archives" dialog.
New -log[fmt][=name] switch allows to write archive and file names to log file in archiving command for RAR and ZIP formats and also in extracting, deleting and listing commands for RAR format. This switch is especially useful, when you need to further process an archive created with -ag or -v switches, because -log provides the archive name generated by WinRAR.
New -@[+] switch allows to process all parameters starting from '@' character either as file names (-@) or as file lists (-@+).
"Setup program" SFX options are moved from "General" to "Setup" page of "Advanced SFX options" dialog. Both "Run after extraction" and "Run before extraction" are now multiline, so it is possible to specify several setup programs for same SFX archive.
"SetupCode" SFX script command instructs SFX archive to wait for termination of setup program and return the exit code of setup program increased by 1000 as the exit code of SFX executable. GUI equivalent of this command is "Wait and return exit code" option on "Setup" page of "Advanced SFX options" dialog.
SFX does not support "S" (create in the top level of Start Menu) "Shortcut" command mode anymore. Recent Windows versions do not allow programs to add items to the top of Start Menu.
Volume size in archiving and wizard dialogs can be specified as a decimal fraction. Decimal mark is defined by Windows regional settings.
-v command line switch also allows decimal fractions. In command line mode the dot (.) is always used as the decimal mark. For example, -v1.5g switch means 1.5 gigabytes.

Veranderingen voor v4.01 Beta 1 - v4.01

1. Added support for file sizes stored in binary format in TAR archives. Some TAR archives use the binary size format instead of octal for files larger than 8 GB.
2. Bugs fixed:
a) "Repair" command failed to properly reconstruct structure of RAR archives, which contained at least one file with packed size exceeding 4 GB. This bug did not affect the recovery record based repair. It happened only if recovery record was not found and WinRAR performed reconstruction of archive structure;
b) even if "Do not extract paths" option in "Advanced" part of extraction dialog was set as the default, WinRAR still unpacked file paths if called from Explorer context menu;
c) after entering a wrong password for encrypted ZIP archive, sometimes WinRAR ignored subsequent attempts to enter a valid password;
d) "Wizard" command did not allow to create self-extracting and multivolume archives, when compressing a single folder or a file without extension;
e) "Import settings from file" command did not restore multiline comments in WinRAR compression profiles;
f) when converting RAR volumes having name1.name2.part#.rar name format, "Convert archives" command erroneously removed ".name2" name part. So resulting archive had name1.rar file name instead of expected name1.name2.rar;
g) RAR could crash when creating a new archive with -agNNN switch if archive number in generated name was 110 or larger;
h) WinRAR failed to display non-English file names in 7-Zip archives properly if they used a non-default code page. It was the display only problem, such names were unpacked correctly.

Veranderingen voor v4.00 - v4.01 Beta 1

Added support for file sizes stored in binary format in TAR archives. Some TAR archives use the binary size format instead of octal for files larger than 8 GB.
Bugs fixed:
"Repair" command failed to properly reconstruct structure of RAR archives, which contained at least one file with packed size exceeding 4 GB.
This bug did not affect the recovery record based repair. It happened only if recovery record was not found and WinRAR performed reconstruction of archive structure;
even if "Do not extract paths" option in "Advanced" part of extraction dialog was set as the default, WinRAR still unpacked file paths if called from Explorer context menu;
after entering a wrong password for encrypted ZIP archive, sometimes WinRAR ignored subsequent attempts to enter a valid password;
"Wizard" command did not allow to create self-extracting and multivolume archives, when compressing a single folder or a file without extension;
"Import settings from file" command did not restore multiline comments in WinRAR compression profiles;
when converting RAR volumes having name1.name2.part#.rar name format, "Convert archives" command erroneously removed ".name2" name part. So resulting archive had name1.rar file name instead of expected name1.name2.rar;
RAR could crash when creating a new archive with -agNNN switch if archive number in generated name was 110 or larger.

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