Your message dated Sat, 1 Sep 2012 20:25:19 +0000
with message-id <[email protected]>
and subject line par2 tries and fails to repair with some input data
has caused the Debian Bug report #296387,
regarding par2 tries and fails to repair with some input data
to be marked as done.
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--
296387: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=296387
Debian Bug Tracking System
Contact [email protected] with problems
--- Begin Message ---
Package: par2
Version: 0.4-2
Severity: normal
On a 700MB set of 48x15MB files I downloaded from usenet [1], par2
thinks it can repair, but the repaired file fails verification.
peter@holly:/var/cache/tmp/mst3k$ par2 r
MST3K___0206___20010709___Ring_of_Terror.vol01+02.par2
par2cmdline version 0.4, Copyright (C) 2003 Peter Brian Clements.
par2cmdline comes with ABSOLUTELY NO WARRANTY.
This is free software, and you are welcome to redistribute it and/or
modify
it under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 2 of the License, or (at your
option) any later version. See COPYING for details.
Loading "MST3K___0206___20010709___Ring_of_Terror.vol01+02.par2".
Loaded 100 new packets including 2 recovery blocks
There are 48 recoverable files and 0 other files.
The block size used was 355212 bytes.
There are a total of 1984 data blocks.
The total size of the data files is 693366677 bytes.
Verifying source files:
...
Target: "MST3K___0206___20010709___Ring_of_Terror.part32.rar" - found.
Target: "MST3K___0206___20010709___Ring_of_Terror.part33.rar" -
damaged. Found 40 of 42 data blocks.
Target: "MST3K___0206___20010709___Ring_of_Terror.part34.rar" - found.
...
Scanning extra files:
Repair is required.
1 file(s) exist but are damaged.
47 file(s) are ok.
You have 1982 out of 1984 data blocks available.
You have 2 recovery blocks available.
Repair is possible.
2 recovery blocks will be used to repair.
Computing Reed Solomon matrix.
Constructing: done.
Solving: done.
Wrote 14680064 bytes to disk
Verifying repaired files:
Target: "MST3K___0206___20010709___Ring_of_Terror.part33.rar" -
damaged. Found 40 of 42 data blocks.
Repair Failed.
I gather that Reed Solomon codes can sometimes require more par
blocks than normal, if the missing blocks form unlucky polynomial
coefficients or something... Maybe par2 isn't detecting that?
[1] My data is an episode of Mystery Science Theater 3000, which
apparently is legal to copy, see dapcentral.org :)
I won't attach my input data set to this bug report, but I downloaded it
from alt.binaries.multimedia.mst3k
b59f0c90baa2662a6c642995301ab892
MST3K___0206___20010709___Ring_of_Terror.part01.rar
60547537dd35a4b8f87a03b1e85c8913
MST3K___0206___20010709___Ring_of_Terror.part02.rar
e40fbf5800b2bbb3b7640bc364a14483
MST3K___0206___20010709___Ring_of_Terror.part03.rar
a2b259220a6354ddf1663ade239bf8d5
MST3K___0206___20010709___Ring_of_Terror.part04.rar
f25ccae1623952650b6ea212b203569c
MST3K___0206___20010709___Ring_of_Terror.part05.rar
4d9ecacaa6c86d113fe40e77e0cf16cb
MST3K___0206___20010709___Ring_of_Terror.part06.rar
53898c54ac3460e906062cf5f562e65a
MST3K___0206___20010709___Ring_of_Terror.part07.rar
43328f4903e8536800204dbb2f0f13e8
MST3K___0206___20010709___Ring_of_Terror.part08.rar
0f4d3f7f6b2c34905f78e16c50a48c6a
MST3K___0206___20010709___Ring_of_Terror.part09.rar
9901fa28c7a036f0e8f32f52851d1a6c
MST3K___0206___20010709___Ring_of_Terror.part10.rar
96929b59c640688dc2c31a6bb5155cb3
MST3K___0206___20010709___Ring_of_Terror.part11.rar
a992e215afdc371e6486d1f85af18b1b
MST3K___0206___20010709___Ring_of_Terror.part12.rar
ed4e9300bd94f7ff37d805b5b6b2650c
MST3K___0206___20010709___Ring_of_Terror.part13.rar
073d633c04e41fa5e38da4347da75485
MST3K___0206___20010709___Ring_of_Terror.part14.rar
c729fe5910f918dfc14a6dd5904119ba
MST3K___0206___20010709___Ring_of_Terror.part15.rar
b4c996b030306b477d5988ce3625fde2
MST3K___0206___20010709___Ring_of_Terror.part16.rar
4333d1b49be6894c5ee3070aef732007
MST3K___0206___20010709___Ring_of_Terror.part17.rar
e14e6377d4e08b52665e6fa5e278dd19
MST3K___0206___20010709___Ring_of_Terror.part18.rar
f302bed250c299882c2d839b71f2b094
MST3K___0206___20010709___Ring_of_Terror.part19.rar
092f0390c2fe55d820aa87a8995e295a
MST3K___0206___20010709___Ring_of_Terror.part20.rar
bbad13589840277f513243180ee72bc6
MST3K___0206___20010709___Ring_of_Terror.part21.rar
46d5c89aa15189b78729e021feea8913
MST3K___0206___20010709___Ring_of_Terror.part22.rar
b77153e0191bbd5324fb43901454812f
MST3K___0206___20010709___Ring_of_Terror.part23.rar
b7ad1a60cb0e861b4ef98a70a72ed044
MST3K___0206___20010709___Ring_of_Terror.part24.rar
1366b6abd26a5615e7b329975dfbf57b
MST3K___0206___20010709___Ring_of_Terror.part25.rar
88917d559e2f88535d51b9c1c251c62f
MST3K___0206___20010709___Ring_of_Terror.part26.rar
e003212a721b1c1b736b3e2be930f2cd
MST3K___0206___20010709___Ring_of_Terror.part27.rar
644b9ed8bada10b6c8ece4e7afb2a0ca
MST3K___0206___20010709___Ring_of_Terror.part28.rar
09a0417bfcb43ef090773e7bdb8dba77
MST3K___0206___20010709___Ring_of_Terror.part29.rar
a11bdd77171b9c1f3ed9f4766c1b2cee
MST3K___0206___20010709___Ring_of_Terror.part30.rar
6cc73909bc5e5deaa0b7f7423741b428
MST3K___0206___20010709___Ring_of_Terror.part31.rar
aeee6dbb2f91168be48ca30837e67beb
MST3K___0206___20010709___Ring_of_Terror.part32.rar
8cecbea9c2d84d86a4d9d762f5060744
MST3K___0206___20010709___Ring_of_Terror.part33.rar
9cc5e8adeca81dead220ecb5cb20e410
MST3K___0206___20010709___Ring_of_Terror.part33.rar.1
0b2ba2066591bec9a9a77681a61a9877
MST3K___0206___20010709___Ring_of_Terror.part34.rar
b7d740d3dff7ed7b5b52ea6cfc6dfb13
MST3K___0206___20010709___Ring_of_Terror.part35.rar
3235a30de7b9689484a4e1191da27741
MST3K___0206___20010709___Ring_of_Terror.part36.rar
4bbba684c187c82a481e439d2acc0243
MST3K___0206___20010709___Ring_of_Terror.part37.rar
396314c10ff1a2e6fcaa045cc77a0201
MST3K___0206___20010709___Ring_of_Terror.part38.rar
a8b94582ccc5bfa05d71e213a763340d
MST3K___0206___20010709___Ring_of_Terror.part39.rar
a69014a8313e0e5854e98c2b630582f2
MST3K___0206___20010709___Ring_of_Terror.part40.rar
37742f95b2f507da878f9ad61f71d8ff
MST3K___0206___20010709___Ring_of_Terror.part41.rar
5a00755ab55df2334e5470d53ea259e7
MST3K___0206___20010709___Ring_of_Terror.part42.rar
7c421558a6a4fbc9827edc06a6f43067
MST3K___0206___20010709___Ring_of_Terror.part43.rar
d71ac043277aa8cf527c1b866864d407
MST3K___0206___20010709___Ring_of_Terror.part44.rar
b38d65875d0f871f6dcff78287521bb3
MST3K___0206___20010709___Ring_of_Terror.part45.rar
bbfdefdb9783a8f669ee2513ba146464
MST3K___0206___20010709___Ring_of_Terror.part46.rar
c79e14647bd03e592d533e3fe2b82e78
MST3K___0206___20010709___Ring_of_Terror.part47.rar
01bf81d93d1baf97a55ecb0cd6dcf724
MST3K___0206___20010709___Ring_of_Terror.part48.rar
b7f8aaf29c886530a4c55bddc49c35e3
MST3K___0206___20010709___Ring_of_Terror.vol01+02.par2
email me if you want me to do something like put these files on a web
server where you can get them.
BTW, this is reproducible. My computer doesn't randomly have data
errors, and I've stress-tested it quite thoroughly.
-- System Information:
Debian Release: 3.1
APT prefers testing
APT policy: (990, 'testing'), (500, 'unstable')
Architecture: i386 (i686)
Kernel: Linux 2.6.10-rc2-mm4-vanilla
Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968)
Versions of packages par2 depends on:
ii libc6 2.3.2.ds1-20 GNU C Library: Shared libraries an
ii libgcc1 1:3.4.3-6 GCC support library
ii libstdc++5 1:3.3.5-8 The GNU Standard C++ Library v3
-- no debconf information
--- End Message ---
--- Begin Message ---
Closing old unreproducible bug.
--- End Message ---
