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Questions tagged [file-archiver]

File archivers are programs capable of adding files and folders into an archive file, such as 7-Zip, TAR, WinAce, and WinRAR.

32 questions
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Different compression methods in 7zip: Which is best suited for what task?

So there are different compression methods in 7zip. Which method is best suited for what task? For example: One difference between LZMA and LZMA2 is I can choose all my cpu cores, whereas in LZMA 2 cores is the max.
Grumpy ol' Bear
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How is it possible that WinRAR can repair any volume with one .rev file?

I just learned about .rev files with WinRAR -- where if you have a 10-part RAR volume, for example, plus one .rev (recovery) volume -- the .rev volume will be able to "fix" any one corrupted .rar volume. How is this possible? I don't understand how…
Coldblackice
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Whatever happened to compressed read/write filesystems?

Back in the 90s, my home computer was an Acorn Archimedes. It had on it a piece of software called ArcFS, which allowed you to create compressed archives, a bit like zip files. Unlike zip files, they could be mounted as a disk, a bit like dmg files…
David
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6
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1 answer

very large .iso file, add small number of files quickly

In windows 11, NTFS file system hdd or ssd, Suppose that there is a very large .iso file, for example 200 GB. That .iso file contains only data files (like music, text, documents..) and not bootable. And I want to add some small number of files to…
imida k
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2 answers

Can I open .zip files created with split .zip.001 files without 7-zip?

I use 7-zip to create several archives with fixed size (512 Mb) from one big file. They have this structure: my_name.zip.001 my_name.zip.002 ... my_name.zip.005 My problem is that without 7-zip I can't open them, is it possible by just using…
mrgloom
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Compressed file with a header containing all files within it, at the beginning of the file

I have noticed that most files resulting from a compression / archive process do not have a list of the files contained at the beginning of the resulting file, but rather at the end of it. For example, ZIP files contains partial headers for each…
jimm-cl
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3
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Download and extract parts containing specific file from split 7z archive?

There's a file I want that's part of a very large, split 7z archive. Instead of downloading the entire 100gb archive, I'm wondering if it's possible to access the Compressed Metadata Block/End Header by downloading the last few parts of the archive,…
Demon_Monkey
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Can I password protect new files added to an archived 7zip file? When I add news files to an archive, they're not password protected

Currently I have a 7-zip archive that I made full of videos and pictures that are password protected. Now, I have more videos and pictures that I want to put in the archive, however when I do, they're not influenced by the password that I put in…
Dizzy
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7-Zip. t (Test integrity of archive) command. Syntax. Two variants. Difference

I use 7-Zip. I work in Windows 10 Home 64-bit. I use command line. From 7-Zip help I know there is t (Test integrity of archive) command. Do I understand right way the following? In this case 7z t archive.zip I check integrity of zip file? I check…
Konskoo
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1 answer

Extract hash values (CRC) and path names from an archive

I have successfully extracted data from a large .rar archive (1.9TB) using 7-zip and now I want to delete the archive. However, before I do so, I would like to save path names and, most importantly, the corresponding CRC values that are listed in…
an531
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How to create a self-extracting archive that works on DOS?

I need to create a self-extracting archive for DOS. It's on a legacy project that currently uses lha (by Haruyasu Yoshizaki) to create the self-extractor. This does work, however when it runs it asks if we want to replace ever file. For hundreds of…
Firedragon
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Compression/archive that can add files without extracting/recompressing

In Windows, is there a compression format (archive format), specialized for adding some new small numbers of files, to already existing compressed file, without extracting and re-compressing the already existing compressed file ? So that it takes…
imida k
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1
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1 answer

Create multi volume archive of standalone zips

Is there a way using 7-Zip to create multi-volume archives (totaling many gigabytes) with each archive as a standalone zip with no files spanning multiple volumes??? Scenario. User has to upload 16 gb of images to a website, but uploads are capped…
Steve Reeder
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Utility for counting total files inside of multiple Zips?

On Windows 7, I have 120 Zip files, each Zip containing images. Is there any utility or software with which I can confirm how many total images are combined in all 120 Zips?
Roxion
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Are there drawbacks to sqlite as archivation format?

I have a few huge folders of small files I want to archive for long term storage (about 200GB). Instead of just using something like gzip/tar/dar/7zip I am considering to use sqlite sqlite3 Backup.db ".ar -cv Data" Disregarding the compression,…
afiori
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