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Re: How reliable is zipping in Windows 7 Explorer?

Cross-posted to 2 groups.

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Char Jackson <none@none.invalid> writes:

> On Sun, 6 Jan 2013 13:51:53 -0800 (PST), 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.
>
> If you're concerned with the integrity of any data files, zip or otherwise,
> one way to get peace of mind is to use Quickpar to create a recovery set.
> Normally, 10% is a nice round number to use, but feel free to adjust the
> settings as you see fit. With a Quickpar recovery set, not only can you know
> for sure whether your data is intact, but if it's damaged you can repair it.
>
> <http://www.quickpar.org.uk/>
>
>>How reliable is the zip that is native to Windows 7?
>
> It's fine, as far as it goes. The zip spec has been around for a long time
> and is well known, but it's subject to corruption from outside factors.
> Tools like Quickpar address those weaknesses, whether for zip files or any
> other type of digital file.

In my experience the disk is more likely to be a problem than the
file--particularly optical disks.  It's also worth mentioning the
obvious that for anything you really care about, you should back it up
in more than one place--and every so often, you should actually try to
restore--in a non-emergency way--from the backups you have, to make sure
they really are backups and not random bits.

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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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