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Re: How reliable is zipping in Windows 7 Explorer?

Cross-posted to 2 groups.

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In comp.compression AndyHancock <andymhancock@gmail.com> wrote:

> There have been times in the past when a zip file I created was
> corrupt (or became corrupt somehow).  I encountered this either using
> WinZip or command-line zip, possibly in old Unix environments.  To me,
> there is a risk in relying solely on zip archives and deleting the
> original unzipped files.  The risk isn't only in losing one file that
> is corrupt -- any corruption anywhere in the entire archive could
> render all the files therein inaccessible.  Hence, the risk increases
> with the size of the archive.

For tgz, the usual unix gzipped tar file, any corruption makes it
pretty hard to recover anything after that.

As I understand zip, though, each file is compressed separately.
The index is at the end, and could be lost or corrupt, but it is usually
possible to find the beginning of a file, and uncompress it, even
without the index.
 
> How reliable is the zip that is native to Windows 7?  In addition to
> that general question, what about specifically for files in the
> Gigabyte range (fraction of a GB or several GBs)?  If it is very
> reliable, then I will use the Windows 7's "compressed (zipped) folder"
> to create archives for writing to DVD.

You mean how often does it create corrupt zip files?

I would expect more often the corruption occurs later.

You could store them on a RAID (redundant) disk to reduce the corruption
that could happen.

-- glen

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Thread

How reliable is zipping in Windows 7 Explorer? AndyHancock <andymhancock@gmail.com> - 2013-01-06 13:51 -0800
  Re: How reliable is zipping in Windows 7 Explorer? Char Jackson <none@none.invalid> - 2013-01-06 17:25 -0600
    Re: How reliable is zipping in Windows 7 Explorer? Carson Chittom <carson@wistly.net> - 2013-01-06 17:41 -0600
      Re: How reliable is zipping in Windows 7 Explorer? Char Jackson <none@none.invalid> - 2013-01-06 23:39 -0600
        Re: How reliable is zipping in Windows 7 Explorer? andymhancock@gmail.com - 2013-01-11 22:46 -0800
          Re: How reliable is zipping in Windows 7 Explorer? Robert Wessel <robertwessel2@yahoo.com> - 2013-01-12 03:33 -0600
            Re: How reliable is zipping in Windows 7 Explorer? andymhancock@gmail.com - 2013-01-19 23:29 -0800
              Re: How reliable is zipping in Windows 7 Explorer? glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2013-01-20 08:10 +0000
                Re: How reliable is zipping in Windows 7 Explorer? Willem <willem@turtle.stack.nl> - 2013-01-20 11:33 +0000
                Re: How reliable is zipping in Windows 7 Explorer? franklin.macintosh@gmail.com - 2013-01-25 22:23 -0800
  Re: How reliable is zipping in Windows 7 Explorer? glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2013-01-06 23:57 +0000
    Re: How reliable is zipping in Windows 7 Explorer? BGB <cr88192@hotmail.com> - 2013-01-07 01:24 -0600
      Re: How reliable is zipping in Windows 7 Explorer? andymhancock@gmail.com - 2013-01-11 23:04 -0800

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