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Windows 7: Do you have a prefered file compression software or file format?

17 Apr 2013   #1

Windows 7 Professional 32 bit
Do you have a prefered file compression software or file format?

Iuse winrar and need to know if there are any differences between the different compression formats ( zip, rar, tar) and if one of them is more robust than the rest?

My System SpecsSystem Spec
17 Apr 2013   #2
Microsoft MVP

Windows 7 Ult. x64


.tar is Unix-based and natively doesn't compress data (it was originally designed for tape backups in the 70's). If you use TCShell, Bourne, Korn etc. in a Unix environment, then you can use the gzip command line argument to compress a modified version of the .tar format.

There is little difference between compression ratios for .rar (propreity format) and .zip (now public domain) formats - both are extremely robust and support AES encryption.

Personally, I prefer the .7z format used by 7ZIP - it provides custom compression ratios, and on very large files consistently achieves about 10% greater compression, albeit it at a slower speed (greater compression = slower speed).

I regularly use the command line version of 7ZIP within .BAT files to compress data before using ROBOCOPY to backup the .7z files.

My System SpecsSystem Spec

 Do you have a prefered file compression software or file format?

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