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Can a bad spot on HDD cause CRC's errors in rar files ?

post #1 of 7
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I have a question is it possible that a unstable OC could make corrupt rar files ? I ask cause I recently had to rar about 50 iso's about 1-4 gig each.

After I was done I xfer'ed them to a ext HDD dock station. The next day I happen to need two of those rar'ed ISO's so I rexfer'ed them back to my main HDD where I orginally rar'ed them. Out of the 50 had two so far that were corrupt. When I tried to unrar them the winrar program said crc's errors neither files would unrar.

So far I've did a scan disk check and also checked the box to fix auto I did this for the ext and the results said there was no problems found on my USB3.0 ext HDD.

I also ran the same disk check for my main HDD, but you know when you run a disk check for your main OS HDD, it don't tell you any results so you don't know, when it's done it boots to your desktop, so who knows.

I've not check all 50 ISO rar files. My ram is not OC'ed I'm pretty sure my OC'ed cpu is stable.
I've rar'ed some 5 more ISO's since then, xfered back and fourth to my USB3.0 ext HDD and I've had to no problems with those rar files.

I'm thinking maybe it's the HDD. Maybe I should run a third party program to scan the HDD completely but which program ?

When I did a scan check if it did find bad spots shouldn't the OS know that now and mark those spots as bad and not put data there in the future ?

What should I do I just want to rule stuff out. thanks
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post #2 of 7
how long did it take to compress these ISOs? if it does it rather quickly i don't think it is due to instability. you could run prime 95 for 12hrs to see if it is unstable. if it is a bad sector on either hard drive you would have gotten a write error. If it was only two of them I don't know that I would jump to the conclusion that its a hardware error.
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post #3 of 7
I wouldn't worry about crc error being caused by broken HDD. I get these error from time to time and when I pack it again it will work well so it's mostly just error in compressing files
post #4 of 7
Thread Starter 
Quote:
Originally Posted by DSP1 View Post

how long did it take to compress these ISOs? if it does it rather quickly i don't think it is due to instability. you could run prime 95 for 12hrs to see if it is unstable. if it is a bad sector on either hard drive you would have gotten a write error. If it was only two of them I don't know that I would jump to the conclusion that its a hardware error.

Well it depends some ISO's can be rar'ed in mins and some can take 10 mins depending how much filler is in the ISO, it's always been like this since the last 4 PC's I've had. So that isn't in question.

Ok if my rar is bad when I made it, then why when I xfer'ed it to my ext HDD dock station why didn't I get a write error then at that point ? I did not get a write error sending it to my ext HDD and neither when I sent back my main drive. I do know what your talking about a write error I've had them before the file would not xfer between HDD's. But in this case it did xfer fine. thanks


Quote:
Originally Posted by nikolauska View Post

I wouldn't worry about crc error being caused by broken HDD. I get these error from time to time and when I pack it again it will work well so it's mostly just error in compressing files

I have the latest winrar version installed I have a hardtime to believe it failed on me. thanks
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post #5 of 7
CRC errors are generally due to corrupted signals or bad cables. The data recieved by the controller does not exactly match the data packet sent from the HDD.


Each packet of data sent from the HDD uses 8b/10b encoding.... for every 8 bits of data, the packets contains 10 bits of data + ECC. If the ECC value does not match the expected value, it triggers a CRC error.
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post #6 of 7
Thread Starter 
Quote:
Originally Posted by DuckieHo View Post

CRC errors are generally due to corrupted signals or bad cables. The data recieved by the controller does not exactly match the data packet sent from the HDD.
Each packet of data sent from the HDD uses 8b/10b encoding.... for every 8 bits of data, the packets contains 10 bits of data + ECC. If the ECC value does not match the expected value, it triggers a CRC error.


This really make sense now finally. My pc new I built this year. This is the docking station I bought new http://www.newegg.com/Product/Product.aspx?Item=N82E16817153133
everything is plugged in tight. I've since redone the same operation again this problem has not happened again since a few weeks ago, granted I don't rar that many iso's often. Is it possible it was a fluke and theres absolutly nothing wrong with my settup and not to worry ? What are the odds it could happen again ? What should I do & what would you do ? What to do in the future. thanks man


Can you please comment on this question I had earlier:
I know it's not the HDD causing the problem and it's the due to corrupted signals or bad cables. But I'm still curious the answer to this following question. I was concerned that maybe it was my main HDD that had a bad spot/sector on it.
When I did a Error-check on my main HDD, if it did find bad spots/sector's does the OS make a note of it ? and mark those spots as bad and not put data there in the future ?
Edited by Subzero11 - 11/29/11 at 3:44pm
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SSF
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post #7 of 7
Yes, if there's some bad sectors on the hard drive, unrar-ing can be a problem.
I just had an issue on my laptop a week ago. I knew the hard drive was failing beforehand.
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