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deelix
PDIP Member
Posts: 32062
Location: Norway
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 Posted: Thu, 19th Jan 2006 23:49 Post subject: |
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| Posted: Fri, 20th Jan 2006 00:25 Post subject: |
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is it just one archive your looking to repair?
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fisk
Posts: 9145
Location: Von Oben
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| Posted: Fri, 20th Jan 2006 00:26 Post subject: |
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You cannot "repair" RAR-archives, only extract the content up to the point where the data is corrupted.
There are no magical ways to get corrupted data from a RAR-archive back, so the term "repair" is superfluous, and even misrepresentative here.
Yes, yes I'm back.
Somewhat.
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sTo0z
[Moderator] Babysitter
Posts: 7449
Location: USA
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| Posted: Fri, 20th Jan 2006 00:28 Post subject: |
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Isn't there some nonsense about .par files or something? o.O
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| Posted: Fri, 20th Jan 2006 00:33 Post subject: |
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| fisk wrote: | You cannot "repair" RAR-archives, only extract the content up to the point where the data is corrupted.
There are no magical ways to get corrupted data from a RAR-archive back, so the term "repair" is superfluous, and even misrepresentative here. |
I hate to disagree with you but my work pays for several copies of Ontracks Easy Recovery Pro to be installed on our servers, and I have used it many times to "repair" corrupt .zip / .rar archives. (yes there are sometimes when it doesn't always work, but it usually does)
http://www.ontrack.com/easyrecoveryfilerepair/
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fisk
Posts: 9145
Location: Von Oben
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| Posted: Fri, 20th Jan 2006 00:56 Post subject: |
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| tb5821 wrote: | | fisk wrote: | You cannot "repair" RAR-archives, only extract the content up to the point where the data is corrupted.
There are no magical ways to get corrupted data from a RAR-archive back, so the term "repair" is superfluous, and even misrepresentative here. |
I hate to disagree with you but my work pays for several copies of Ontracks Easy Recovery Pro to be installed on our servers, and I have used it many times to "repair" corrupt .zip / .rar archives. (yes there are sometimes when it doesn't always work, but it usually does)
http://www.ontrack.com/easyrecoveryfilerepair/ |
Whether you agree with me or not, does not change my statement:
1. Lost data is lost. There is no way to magically make it re-appear.
Perhaps you can, eg. restore parts of an archive, but the ones that have been corrupted due to lost/corrupted data are lost forever.
2. There is no way to get that [lost/corrupted] data back using any "repair"-tool.
What these so-called "repair"-tools do, is try to re-create the RAR-archive using the data that is available. But my initial statements here (1&2) are still true.
Yes, yes I'm back.
Somewhat.
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| Posted: Fri, 20th Jan 2006 02:35 Post subject: |
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If you have Par your set. If there is a Recovery Record in the .RAR your trying to fix that should also work. Anything else and I think you are SOL.
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[sYn]
[Moderator] Elitist
Posts: 8374
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| Posted: Fri, 20th Jan 2006 13:43 Post subject: |
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RAR FILES CAN BE REPAIRED USING PAR SETS
However, to get a par set you must find someone with the exact same archive set and ask them to build a par set from it. Almost 90% of "downloaded material" comes with a Par set, you should always download this and run a parity check to make sure your rar's are all up to scratch.
http://www.par2.net for more info
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arw
Posts: 1281
Location: Barry - Wales - (UK)
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| Posted: Fri, 20th Jan 2006 14:56 Post subject: |
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If there archive has a recovery record you should be able to fix it with winrar..
Goto winrar under tools tab click on show information and check if you have a recovery record if not the archive can not be repaired without par files.
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| Posted: Fri, 20th Jan 2006 15:30 Post subject: |
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Pars aren't the only way but it's one way. They all work on the same principles though of repeating binary code. Since there's no speicific block created with a par this can take any 'programmed' shape and recover any missing blocks.
You could try to decode some of the raw data.
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| Posted: Fri, 20th Jan 2006 23:27 Post subject: |
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werdercanuck
Posts: 1562
Location: Pot Capital of Canada (BC)
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| Posted: Sat, 21st Jan 2006 00:58 Post subject: |
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as far as i know, you can only repair archives (rar, zip, etc.) if they were archived with the option 'add recovery record' or something like that....
and PAR works perfectly
1F U C4N R34D 7H1S, U R34LLY N33D 70 G37 L41D
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| Posted: Sun, 22nd Jan 2006 18:45 Post subject: |
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..it works though 
