We all deal with file transfers in our daily lives. If you are a mobile user, than you must be using Bluetooth for transferring your files, or in these days WiFi direct is in order. Whereas if you are a daily computer user apart from mobiles, you must be sending files through emails, Network file transfer (If you are on a local network), online public or private sharing through services like Drop-box, Zoho Docs, One drive by Microsoft and many more. A smaller size is easy to share but when it comes to large or multiple file transfer, we need to compress the files and create a single package. Zip compression is the most common technique used by computer users, followed by Rar, Tar, Tar.gz and 7z.
With the flexibility of compressing large and multiple files in a single archive file, These techniques sometimes become a curse for the users. Such files are prone to be effected by virus the most. If even there is any error during file transfer (locally or over WEB), the archive files get corrupted before your eyes blink. Before we talk about how to repair archive files, or a particular Zip, Rar, TAR or 7z file, let us know what exactly these extensions are.
Applications to create an Archive file
Zip File: It is a file which is compressed or zipped using the Zip compression, it is a most common type of compression in which every single file in the archive folder is compressed separately.
A Window user can easily create a ZIP archive by right-clicking on a file and selecting “Send to → Compressed (zipped) Folder. Same method is followed by ” Mac OS X users, they can create ZIP files by right-clicking a file and selecting “Compress [filename].”
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7z File: It is a compressed archive file which is created with Igor Pavlov’s 7-Zip file compression utility. It uses an open-source LZMA compression, which has a comparatively high compression ratio and it can include strong AES-256 (256-bit) encryption. Also supports file sizes up to 16,000,000,000 GB.
By defuult, 7z compression uses the LZMA method. 7z format also supports the PPMD, BCJ, BCJ2, BZip2, and Deflate compression methods.
RAR file: RAR file is basically a WinRAR Compressed Archive file which contains more than one file in it. It provides a higher compression ratio which is more than a typical ZIP compression. It incorporates a proprietary compression algorithm which is now adopted by other compressors like .7z as well.
It also gives you an ability to compress and split the file into multiple parts. It makes it more secure as the RAR file needs all the parts in the same folder to be extracted.
TAR file: It is an archive created by tar which is a Unix-based utility used to compress and package files together. It contains multiple files which are stored in an uncompressed format. These formats are mostly compressed into a .GZ file using GNU Zip compression.
A file name with the “.tar.gz” multiple extension is a TAR archive which is compressed using GNU Zip compression. You can easily identify these files by looking the .Tgz extension.
How to Repair Corrupt Archive Files (Zip, RAR, TAR (.gz), 7z)
If any of your archive files is corrupted due to issues like virus attack, failure during file transfer, you get several messages like: “Can’t extract the file” , “No files to Extract”, “Unexpected end of RAR archive”, “Cannot open a zip file”, “Error 0x800004005: Unspecified error” invalid argument message while extracting a TAR file in Linux, Non 7-zip archive and many more.
You can use advanced RAR repair feature by WinRAR to repair RAR files, 7z or Zip. Currently WinRAR doesn’t give any option to repair TAR (.gz) files.
How to use Advanced RAR Repair
- Open your WinRAR application
- Locate your RAR, ZIP or 7z file
- Select the file and click on “Tools” or “ALT + S“
- Click on Repair Archive tab
- Click on the Radio Button followed by “Treat the Corrupt Archive as Zip“
- The Repair process will start. Click done when its completed.
This feature is not supported for TAR or T.gz file. Also if the archive file is corrupted severely, this internal RAR repair tool cannot fix those errors.
All in One RAR repair Tool
In cases like I mentioned above, you might need a third party tool that can repair ZIP, RAR, TAR and TAR.gz, and & 7-zip files. But repairing a RAR files with third party tools can often harm your files. I can suggest you an Archive Recovery Tool to extract data from your archive files. The tool by SysInfoTools extracts, decompresses the files and provide all the compressed files intact. This means even if you created a TAR file in Unix based OS, you can retrieve and recover data in windows OS using a tool.
If you are just facing issue with your Zip file, you can repair it by using ZIP Repair Tool. Both these tools are paid and commercialwares, therefore I suggest you to try an evaluation version (Demo Version) before buying.