Re: [opensuse] About Backing Up
- From: "Carlos E. R." <robin.listas@xxxxxxxxxxxxxx>
- Date: Sun, 6 May 2007 19:30:17 +0200 (CEST)
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The Friday 2007-02-23 at 12:39 -0000, David Bolt wrote:
What is par2?
The home page describing it is here:
<URL:http://parchive.sourceforge.net/>
Interestingly, the distro has a "par" from that same page, but not "par".
There isn't even a man page for "par". I guess from what you say that they
are not the same. [...] I saw a link explaining the differences.
What would I need to compile - from sourceforge?
gpar2-0.3.tar.gz
libpar2-0.2.tar.gz
par2cmdline-0.4.tar.gz
Curiously, they have "par-v0.1alpha.tar.gz", when suse has "par-1.1-62"
[...] AH! It is hidden as "older releases", "par-v1.1.tar.gz".
[...]
The make run (par2cmdline-0.4) fails...
reedsolomon.cpp:54: error: explicit specialization of bool ReedSolomon<Galois<8u, 285u, unsigned char> >::SetInput(const std::vector<bool, std::allocator<bool> >&) must be introduced by template <>
reedsolomon.cpp:54: error: template-id SetInput<> for bool
ReedSolomon<Galois<8u, 285u, unsigned char> >::SetInput(const std::vector<bool, std::allocator<bool> >&) does not match any template declaration
reedsolomon.cpp:54: error: invalid function declaration
And a lot more.
...
With the values I use, I should be able to recreate upto 5 missing
files, or significantly more files if dd can copy most of the data.
Interesting :-)
What are you using, where did you get it from?
Source code from sourceforge, patched it to handle GCC4, and then built
an RPM for it. I keep copies of it built for multiple versions of SUSE
here:
<URL:http://www.davjam.org/~davjam/linux/par2/index.htm>
Ah! So you had to modify them...
But... that is version "par2-0.4-5". At
<http://sourceforge.net/projects/parchive> I can only see release 0.3 (feb
2006). Where does the 0.4.5 comes from?
Now I wonder if the "dar" we have in the distro has that implemented [...]
it seems it does.
Dar may have PAR support built in but, since PAR2 hasn't been included
in SUSE, I don't think it'll have PAR2 support. It may have but, since I
haven't used dar, I've no idea.
No, it is "par" - form man dar:
This has of course its limitations, in particular when a data
corruption occurs in the vital part of the backup, i.e. the few
first bytes of each slice, and the last part of the archive (the
catalogue). In case you need to store archive on a bad quality
medium, you could protect each slice with a Parchive recovery file.
(see NOTES for more information about Parchive, and how to
transparently run Parchive from dar)
- --
Cheers,
Carlos E. R.
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