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Re: How reliable is zipping in Windows 7 Explorer?

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On Monday, January 7, 2013 12:39:47 AM UTC-5, Char Jackson wrote:
>On Sun, 06 Jan 2013 17:41:24 -0600, Carson Chittom
><carson@wistlyDOTnet> wrote:
>>Char Jackson <none@noneDOTinvalid> writes:
>>>On Sun, 6 Jan 2013 13:51:53 -0800 (PST), AndyHancock wrote:
>>>> 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.
>
> Optical disc issues are included in what I said above. If the
> optical disc develops a problem, it's still the files that are
> affected. Tools like Quickpar will let you know whether the files
> are ok, and if not, whether they can be repaired.
>
>> 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.
>
> If you use a tool like Quickpar, (I feel like I'm preaching by now,
> but it's the most widely used and therefore the best example), you
> don't have to actually unzip anything. You can just run an integrity
> check and be done with it.

Thanks, Carson, Char.  Quickpar looks very interesting.

About replicating my backups, I don't really have more than one abode to keep two geographically separate items.  A fire will wipe out everything :( .

Point well taken about testing the backup, and how easy Quickpar makes it.  Tar+gzip allows an actual comparison with the unarchived source files, and zip also has a command line switch for integrity checking.

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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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