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#1 2012-11-15 16:59:29

Pacopag
Member
Registered: 2011-05-29
Posts: 256

Bad CRC when unzip-ing large file

Hi.  I downloaded a bunch of .zip files and I'm trying to unzip them via

unzip filename.zip

It works fine on all the files except for one.  It's the largest of the bunch at about 120M.  When I try to unzip it, I get this

bad CRC 41041f89  (should be f5255afc)

File-roller chokes too, but I'm guessing that it's just calling unzip behind the scenes.

BUT....If I unzip it in windows using WinRAR, it works fine.

I've read that unzip commonly chokes on large files, but also that it would be fixed in version 6.0.  But this file isn't even THAT big.  Anyone know what might be going wrong?  Maybe some options might help?

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#2 2012-11-15 18:28:47

Lord Bo
Member
Registered: 2012-11-11
Posts: 151

Re: Bad CRC when unzip-ing large file

Pacopag wrote:
bad CRC 41041f89  (should be f5255afc)

This tells you, that the Cyclic Redundancy Check for this file failed. And that means, that the file is corrupted. Either it got corrupted whilst it was tranferred from the remote server to you, or it was already corrupted on the server. You have to download it a second time. If it still says that the CRC is 41041f89, the file was alredy in corrupt state stored on the server.

Last edited by Lord Bo (2012-11-15 18:31:19)

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#3 2012-11-15 18:37:58

Lord Bo
Member
Registered: 2012-11-11
Posts: 151

Re: Bad CRC when unzip-ing large file

Pacopag wrote:

BUT....If I unzip it in windows using WinRAR, it works fine.

Well, ok, I overread this. This could mean that there is an error with the unzip command, but I rather guess, that WinRAR did unpack the file, though there were errors (maybe was even able to correct them). I don't know, if that is possible with unzip, too, read the man page.

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#4 2012-11-15 18:41:55

Lekensteyn
Member
From: Netherlands
Registered: 2012-06-19
Posts: 179
Website

Re: Bad CRC when unzip-ing large file

Such errors do also occur when you have bad RAM. I suggest you to run memtest.

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#5 2012-11-15 19:40:33

Pacopag
Member
Registered: 2011-05-29
Posts: 256

Re: Bad CRC when unzip-ing large file

Unzipped fine with 7za.  I don't think it's the ram, because the error happens on any computer I try it on.  I think the problem is with unzip.

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