tar error unrecoverable?

[Curt Tresenriter]

On Sat, 25 Jan 2014 22:05:42 +0000
Colin Law <clanlaw at gmail.com> wrote:

> On 25 January 2014 20:02, Curt Tresenriter <ctres at grics.net> wrote:
> > On Sat, 25 Jan 2014 19:25:01 +0000
> > Colin Law <clanlaw at gmail.com> wrote:
> >
> >> >
> >> > Earlier I tried using dd with the noerror option to copy back to
> >> > the original disc. syslog shows:
> >>
> >> Why are you using noerror?  If dd shows read errors then there is
> >> no point carrying on.  Immediately backup any important data on
> >> the disc and chuck it.
> >>
> >> Colin
> >>
> >
> > My understanding was that the option would allow me to get whatever
> > files are not corrupted out of the archive.
> >
> > At this point all I can do is backup a supposedly corrupted archive.
> > That wouldn't be much use.
> 
> All dd does is to make a copy of the file.  If the file cannot be read
> correctly from the disc then with noerror it will just ignore the
> error (I assume) and carry on copying.  The result is that you will
> most likely end up with a file with a bit missing or wrong.  It may be
> possible to recover data from the file, but don't bother unless you
> really need to.  Have you lost the original files that were packed
> into the file?
> 
> Colin
> 

That's exactly what I meant to say.
And yes, it's deleted.