7-Zip 9.26 alpha

7-Zip 9.26 alpha was released.

This is a development version.
Don't use 7-Zip 9.26 alpha to process important files and archives.
If you need more stable version, you can use 7-Zip 9.25 alpha.

7-Zip for 32-bit Windows:

http://dl.7-zip.org/7z926.exe
or
http://dl.7-zip.org/7z926.msi

7-Zip for 64-bit Windows x64:

http://dl.7-zip.org/7z926-x64.msi

What's new after 7-Zip 9.25 alpha:

- 7-Zip now can update WIM archives.
- 7-Zip File Manager now can move files to archives.
- 7-Zip File Manager now can calculate CRC-32, SHA-1 and SHA-256 checksums for files.
- The default encoding for TAR format now is UTF-8. You can use -mcp=1 switch for OEM encoding.
- Command line version:
    - new "rn" command to rename files in archive.
    - new -sdel switch to delete files after including to archive.
    - new -sns switch to store NTFS alternate streams (for WIM format only).
    - new -sni switch to store NT security information for files (for WIM format only).
- Speed optimizations for opening big archives and big disk folders.
- DMG support was improved
- Some bugs were fixed.
- New localization: Aragonese.

7-Zip 9.26 alpha version is provided without source code.
Source code will be released in future beta version.

Please write this forum thread about any new bugs.

Discovered a problem using WIM in Win8RP. Have installed the latest 7zip alpha, but can't open the install.wim (boot.wim works…). "Can't open install.wim as archive" using Win8RP amd64 de-de.

BTW: Thanks for 7-Zip !!!

I think, or mean, its time only for bugfixing and rewrite LZMA2.

On my Win7sp1-64 on 4.3Ghz Sandy 2500k and with Firefox 12 program dir (39.8 MB):

WinRAR 4.20b3 (best, solid) compress it in ~2 seconds
(17.9 MB)

9.26 LZMA (2 threads, ultra, 64MB, 256, 2GB) in ~6.5 seconds
9.26 LZMA2 (4 threads, ultra, 64MB, 256, 2GB)) in ~7.5 seconds (!)
(both ~16.4MB)

Changes of dictionary between 64MB and 8MB, make the archive size +- ~90KB (in % not mentionable),  but have *no effect* to running time of archiving… And we need HUGE MORE of RAM for 4 threads (as Winrar).

/We/ are now little bit TO slow. Eugene pressure ;-)

regards

Little Bootpictures.7z with 6 jpegs each ~120KB…

In 7zFM klick in archive and double klick the picture -> message, system cant provide enough memory. Win7sp1-64 with 8GB.

The same in Winrar 4.20b3 (on this 7z archiv file), picture will show….

Carefully we need a good beta or worthy final…

I can't seem to get the checksum functionality to work. No matter what archive I try, if I select a random file, right click and select Calculate chechsum, I get the error message Operation is not supported.

Hi,
Thanks for the next release..

7-Zip File Manager now can move files to archives.

I tried moving a file from 7z archive it says its "not Implemented".
am i doing something wrong?

4+ threads multithreading in LZMA2 is useful only for big file sets (4x of dictionary size, more than 256 MB for 64 MB dictionary).

That new "Move operation" works only for "from disk to archive", not for "from archive to disk"

"Calculate chechsum" feature works only for files on disk, it doesn't work for files in archives.

Some new WIMs from Microsoft are not 100% correct.
They have errors with reference count for some files.

Next version will open them with warning message.

Thanks!

Hi,

1.Why 7zip does not maintain modified and created dates for folder but does it only for files.
2. Why i open a VHD file i see a pop up saying "There are lost files". What does it mean? And some vhd files are not opened properly in this version whereas same file works good in 9.20 version.

Any suggestions?

7-zip supports MTime and CTime timestamps for folders.
When you write file to some folder, it can change "MTime" for folder that contains file.
So you must set MTime for folder at the end of process.
Previous versions of 7-Zip just stored folders at the end of 7z archive.

Now in 7-Zip 9.26 I have change it.
When you extract archive with 7-Zip 9.26, 7z.exe collects all directory items.
Then it sorts these pathnames in reverse order. And then it sets MTime, СTime and ATime in that order. 7z.exe works so now. 7-Zip File Manager will do it in next version too.

"There are lost files" means that there are LOST files in NTFS, that has no full correct path in tree structure.
I'll look NTFS code more to check error.

Здравствуйте, Игорь
1 Сделал тестовый батник для сравнения версий 9.25 и 9.26, т.к., столкнулся с багами при распаковке/тестировании архивов сделанных методом LZMA2 в новой версии.

@Echo Off
rem OS - Win7 x64
rem bin - test folder for compression. (set of files installed 7-zip archiver)
rem 925 - folder with files archiver 7-zip x64 version 9.25. (7z.dll 7z.exe 7zG.exe)
rem 926 - folder with files archiver 7-zip x64 version 9.26. (7z.dll 7z.exe 7zG.exe)
Set filelist=%TEMP%\CMDEC22.tmp
Echo %~dp0bin\>%filelist%
Set cmdline=@"%filelist%" -scsWIN -ssw -m0=BCJ2 -m1=LZMA:d6m:pb2:lp0:lc3:fb64 -m2=LZMA:d21:pb2:lp0:lc3:fb64 -m3=LZMA:d21:pb2:lp0:lc3:fb64 -mb0:1 -mb0s1:2 -mb0s2:3 -mmt2
Set cmdline2=@"%filelist%" -scsWIN -ssw -m0=BCJ2 -m1=LZMA2:d6m:pb2:lp0:lc3:fb64 -m2=LZMA2:d21:pb2:lp0:lc3:fb64 -m3=LZMA2:d21:pb2:lp0:lc3:fb64 -mb0:1 -mb0s1:2 -mb0s2:3 -mmt2
"%~dp0925\7zG.exe" a "%~dp0LZMA_925.7z" %cmdline%"
"%~dp0925\7zG.exe" a "%~dp0LZMA2_925.7z" %cmdline2%"
"%~dp0926\7zG.exe" a "%~dp0LZMA_926.7z" %cmdline%"
"%~dp0926\7zG.exe" a "%~dp0LZMA2_926.7z" %cmdline2%"
"%~dp0925\7zG.exe" t "%~dp0LZMA_925.7z" -r
"%~dp0925\7zG.exe" t "%~dp0LZMA2_925.7z" -r
"%~dp0925\7zG.exe" t "%~dp0LZMA_926.7z" -r
"%~dp0925\7zG.exe" t "%~dp0LZMA2_926.7z" -r
"%~dp0926\7zG.exe" t "%~dp0LZMA_925.7z" -r
rem bug test
"%~dp0926\7zG.exe" t "%~dp0LZMA2_925.7z" -r
"%~dp0926\7zG.exe" t "%~dp0LZMA_926.7z" -r
rem bug test
"%~dp0926\7zG.exe" t "%~dp0LZMA2_926.7z" -r
Pause

Получаю сообщения об ошибке в архивах с методом LZMA2 (созданных как версией 9.25, так и версией 9.26) при проверке версией 9.26, хотя версия 9.25 этих ошибок не находит.

2 Косметические замечания:
- в свойствах exe и dll файлов значится "Copyright (C) 1999-2011 Igor Pavlov" (год не поправлен)
- этот же год показан в диалоге "О программе" и в выводе окна консоли при использовании 7z.exe
- в справке в оглавлении новые пункты: rn (Rename) command, -ai (Include archive filenames) switch, -an (Disable parsing of archive_name) switch, -ax (Exclude archive filenames) switch содержат "лишние" слова, которых нет в других пунктах оглавления.

I run 7-zip always as admin because when I need to extract to UAC protected folders it doesn't elevate if running without admin privileges. Can you add ability to elevate when it extracts to such locations, please?

gora2:
I'll fix these things. And I'll release 9.27 alpha soon.
Thanks!

2
…
- в справке в оглавлении нет пункта к новой страничке : -sdel (Delete files after compression)

Igor,
Any chance you'll add the Type column so we can sort the files inside archives by file type?
I really need this, and it is really useful sometimes.

There is "sort by type" option in View menu.