Comments for How do I fix a cyclic redundancy check error when I try to copy a file?

Comment from Naveen on 2012-01-05

2012-01-06T04:04:44Z

Thanks a lot for the above solution.
The Xcopy /c command worked like a charm!! It saved my 8 GB PST file which was stored in a bad sector location of the HDD. Using the above command I was able to copy the file to a working hard drive successfully. You are a life saver, Leo!!

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Comment from Ronald Vaughan on 2011-11-14

2011-11-14T21:10:47Z

I use a borrowed computer and burn data DVD's to archive mixed media. I used to use "Nero" software on a Windows XP PC,but the owner did away with that,and re-formatted his machines.

So now,a data DVD made months ago will no longer work because of said "cyclic error". I must retrieve this data if possible (the original flash drive it was on,was stolen.)

Nowadays I use "NCH" softsare...Excellent,but I just didn't have access to their Express Burner back then. (So would getting access to another
"Nero" Start Smart site fix the problem?)

The data files jusst won't copy onto a new disc.
Only a couple of files will play.

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Comment from Grant on 2011-10-26

2011-10-26T19:34:16Z

xcopy /c did not work.
I used jzip to zip all the files in the dir, then copied the zipped file to destination.
If only one file in a directory, make some text files, and then zip all and do the copy. Then later just delete those worthless text files.

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Comment from Caroline Parsons on 2011-10-22

2011-10-22T21:29:53Z

Thank You!!!! 3 months since I got a new computer and have lived without a third of my old data. Photos, paid for music and video. 4 hours on and I am still transferring to an external hard drive! just thrilled that I haven't lost my precious memories. Used CHKDSK coz didnt have the funds for spinrite, and so far so very very good! I love technology but not computer savy per say, this was the 1st solution I could follow and obviously it has worked. Thanks again

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Comment from Adam on 2011-10-16

2011-10-16T19:37:24Z

Jayron, to open the command prompt in Windows 7 all you need to do is press the Windows button in the bottom left of your screen, then simply type "cmd" without the quotes.

If this doesn't work hold the windows/start button on your keyboard and press the letter "R". This will open a Run window.

Type "cmd" in the Run window and press "Ok". That should bring up your command window.

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Comment from Natoya Rose on 2011-09-16

2011-09-16T23:13:29Z

SpinRite won't work if the hard drive of the machine you are using is SATA and cannot be switched to compatibility mode. ASUS notebooks are an example of a machine it won't work on.

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Comment from jayron on 2011-09-05

2011-09-05T13:13:46Z

im a user of window 7 and i have the same case for my crc error..
thers no command for window 7??
thc...

Not sure what you mean by "there's no command". All Programs, Accessories has the Windows Command Prompt.

05-Sep-2011

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Comment from Paul Olding on 2011-06-07

2011-06-07T16:59:31Z

Hi Leo - great article. Mine is .pst file. I've tried the xcopy /C you suggest to an external drive and I get a 'File create error: data error (cyclic redundancy check)'.
Any thoughts?

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Comment from Mike on 2011-06-02

2011-06-02T08:19:52Z

I have a hard drive with many bad sectors. I was not able to salvage many documents and photos off of it because of CRC errors. Chkdsk/r found and tried to repair files, but many were still not able to be copied to my new hard drive. Following your advice, I began to use SpinRite, which does seem to be an excellent tool for bit-by-bit data correction, but I realised this was impractical after an hour of correction and calculating that it would take about 200 days to correct the 80 GB drive.

Looking for a better solution, I found Roadil's Unstoppable Copier. This let me target only the files I needed and the files appear copied and readable (as best I can tell, uncorrupted). Even on files that it reported read errors, the new copy opens correctly and I do not see any errors. This all just occurred so there may be problems I don't know about, but I seriously think you should mention this product on your CRC Error page. By the way, for me at least, XCOPY /c/s stopped itself after a few errors. Apparently the /c does not keep overriding after a few error messages (more than one, less than ten).

All things to consider mentioning in your article. Thank you anyway, despite the limits of your advice.

Respectfully,
Michael Leslie

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Comment from Wm Stanley on 2011-05-13

2011-05-13T19:31:37Z

Dear Leo,
I followed the redundancy correction advice precisely several times. Though copy to nul worked just fine the xcopy /c to a different drive still gave the same redundancy failure. Any other Ideas? I will be running Chkdsk /r again tonight. Thanks for any thoughts.

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Comment from Piyush on 2011-02-02

2011-02-02T13:26:37Z

xcopy worked......!!!

thank you so much....

keep it up

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Comment from Tony on 2011-01-29

2011-01-29T11:53:00Z

CHKDSK /R worked fine for me. The icon for the faulty drive D was showing but I couldn't access any of the data and the drive wouldn't boot up. I started by installing a 2nd copy of xp on a separate drive and setting it as the boot drive in BIOS. This became C and the faulty one D. By using c:/chkdsk/r d: the 5 stage checking process began and after it finished I was able to read and access all the data and, most importantly, copy all relevant data onto C. When I'm finished with it drive D will be dumped!

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Comment from Barry Kharbangar on 2010-12-24

2010-12-24T17:47:09Z

when i try to copy contents of a DVD, cyclic redundancy check error appears. I just got a new hard drive. And I am no good at this stuff. Please help

If you're copying a file from CD or DVD then more commonly that's where the problem is - the CD or DVD. Try reading it on a different machine.

25-Dec-2010

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Comment from Norman McCullough on 2010-11-29

2010-11-30T04:33:01Z

not sure if i entered the command correctly. What is the outlook part in the third line.

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Comment from Red on 2010-10-30

2010-10-31T06:50:24Z

Hi,

I am facing Data error (cyclic redundancy check).
in external seagate 80GB harddisk, That doest show pratition size also in my computer.when i try to open that drive it does give Data error (cyclic redundancy check). How to fix this. I have important data in that drive. Please help me.

Regards
Red

Please read the article you just commented on. It answers this question.

01-Nov-2010

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Comment from Marzieh Ghasemi on 2010-10-15

2010-10-15T19:28:25Z

Leo, I'm having CRC when I try to run a program on windows VISTA. Although this file has been run on other computers, but I do not know what the problem is.
Thanks in advance

As the article states, it's likely a problem with the hard disk on that computer.

16-Oct-2010

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Comment from Javed Akhtar on 2010-10-07

2010-10-07T12:15:12Z

I always faces problem while Burning a CD. When I burn data to a CD, Cyclic Residency Check starts automatically. Kindly tell me how to fix this problem.

Sounds to me like it's your hard disk as it reads the data to be burned. Follow the instructions in the article.

07-Oct-2010

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Comment from CG on 2010-10-05

2010-10-05T13:36:04Z

Leo, I'm having the cyclic redundancy issue running Windows Backup on Windows 7. I'm backing up the main hard drive to an external HD. My question: Does this error message always indicate a problem with the main HD, or could it be a problem with the external HD?

Thanks for this very helpful article.

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Comment from Zabeus on 2010-09-11

2010-09-12T04:52:14Z

The xcopy /c didn't work (always exact same error), but fortunately chkdsk worked like a charm and fixed the file. Thanks!

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Comment from Michael Mihalik on 2010-09-01

2010-09-01T12:08:08Z

Leo,

I am using you method to recover some of the bad files on my hard disk. I was snake bitten, my hard drive failed, with numerous CRC errors on pst files (40 and counting). Very time consuming. Went to use my External HDD backup and I dropped it and now the drive us unreadable. Any thoughts on this? I need major help.

I'd fire up SpinRite on the original drive.

02-Sep-2010

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Comment from sam on 2010-08-11

2010-08-11T10:39:06Z

i am getting the error when i open mu outlook..if i click new message or search..this error doesnt allow me to do anything plz help

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Comment from Sterrant on 2010-08-06

2010-08-06T15:02:29Z

Had exactly the same situation as your example, copying an outlook.pst file. This didn't work. This time I get "File creation error - Data error (cyclic redundancy check)

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Comment from r s on 2010-08-05

2010-08-05T17:04:39Z

I was getting a device i/o error and also sometimes a Data Error (Cyclic Redundancy Check) error when I tried to move or copy certain files from a Maxtor One Touch external hard drive. I did this below and all the error messages stopped and I could move and copy all the files that caused these errors: (WIN XP)
start
run
chkdsk e: /r
(e=Maxtor one touch drive).
try it!

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Comment from Sameer on 2010-07-19

2010-07-19T16:15:09Z

too lengthy and very less informative...... better make it as brief as possible ....... and keeping all the details abstract..... so that those who are interestd in reading it completely will click there and understand... not all of them are interested in what is happening..........

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Comment from Fish on 2010-07-05

2010-07-06T05:03:11Z

Leo - THANKS so much, your info here was very useful! i am so so glad that i copied the data off the drive as quickly as i did (due to your suggestions)... the drive died totally just before it copied the very last few files off (so i only lost maybe 5% of my files, if that). if i had waited, well... it could have been total disaster.

some other handy options for xcopy, that i found useful in this context:

/E - copy all subfolders too, recursively (and create new folders in the target, even if they are empty)

/I - indicates that the destination (if not definitive) is a (new) folder, not a file.

/H - copy hidden/system files too

so... i guess my next step is to try Spinrite. wish me luck!

cheers and THANKS
Peter "Fish" Fisera

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Comment from Jayden on 2010-07-03

2010-07-04T06:59:45Z

I bought a couple of games in bali and 4 of them arent working i tried xcopy and it gave the cyclic redundancy check error! i tried jfilerecovery but it kept freezing up the discs are basically brand new no scratches and it doesnt make sense

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Comment from Julian Harold Lopez on 2010-07-02

2010-07-03T04:47:18Z

I read recently on the net that rubbing a banana on your unplayable, scratched DVD fixes it. Yeah, right. But here is what I did for my Cyclic Redundancy Check error on my very scratched CD. I actually rubbed my foot on it as I remember. I used Turtle wax. Unbelievable!!! Do you know how many years I tried to get this CD to copy back to my puter? this is how I did it. I dipped my index in the Turtle Wax bottle, softly rubbed it around under it, and softly "played" the CD on a clean, soft towel until it shined. And shine it did. I had nothing to loose.

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Comment from bilbo on 2010-06-28

2010-06-28T08:28:19Z

jfilerecovery recommended by anon worke fine here. i had to recover a pretty important videofile which worked out find. after a few retrys with smaller blocks the effective amount of data missing shrinked fom 1,3mb to 97kb in my 1,57gb file. great!

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Comment from anon on 2010-05-02

2010-05-02T11:24:45Z

Bad sectors were causing crc errors in avi and mkv. 3 gb, so was unwilling to redownload. Found this page and xcopy failed. After Wading through countless data recovery options on goggle found jfilerecovery. Portable, did not install just ran. Copied files to another partition. Reported read errors but did not freeze or hang. Copied files play without recoding although with minor glitches where data was lost.
Fast, precise and completely free. Its a java executable .jar so must have sun microsystems jre installed(15mb download, free).
If anyone else ends up here like me then would recommend this before trying/buying any recovery app.
Thank you.

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Comment from Parvez on 2010-04-04

2010-04-04T11:09:36Z

I am not able to copy the .pst file which is very imp for me . i have gone through all the way. plz help me

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Comment from Marcelo on 2010-03-16

2010-03-17T00:24:13Z

Hi all,
I had a CRC error in some DVDs recorded by my cancorder (Samsung) I would like to create some copies for my friends but I got the CRC error. I tried xcopy and I could copy all files from those DVDs to my HD then I used Nero to create DVD copies.
Thanks for that tip.

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Comment from Jinx Dojo on 2010-03-06

2010-03-06T17:37:36Z

Numerous people have commented that "XCOPY /C" does not work when attempting to copy a single file from a corrupted media. I haven't been able to test for magnetic drive corruption, but I can state with certainty that "XCOPY /C" does not allow me to retrieve a CRC-damaged file from a CD/DVD. I suspect the same is also true with magnetic drives; "XCOPY /C" only skips files with errors--it does not skip errors in files.

Another post here suggested using CDCheck: http://www.softwarepatch.com/software/cd-recovery.html . This worked well for me to recover a file from a partially corrupted disc. Sadly, I didn't make enough PAR2 files to completely restore the file. To add to Leo's reminder to backup, I want to also remind everyone (especially backup software developers) that backups are often useless without some sort of built-in redundancy. Media will, eventually, corrupt. Thus far manually creating PAR2 files has been my only option. (WinRAR also offers recovery volumes, but that of course requires archiving the files--PAR2 does not require that.)

I'd love to see more backup software (esp. partition software) include the ability to spread archives over multiple files and include redundancy/repair files automatically, based on user settings.

Good luck to everyone recovering his/her files.

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Comment from Davy on 2010-02-23

2010-02-23T20:58:05Z

thanks for the help i dont get a error anymore do i still need to replace my HD

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Comment from Neel on 2010-01-26

2010-01-26T10:07:07Z

I have tried installing a game bt at 98%, I incur the CRC error. I have then tried to copy the files on to my hard disk and thy have been copied without error. But still, running the installation, I still get the error. Is there any solution or does it have to do with registry things...Please help!

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Comment from Bruce on 2010-01-11

2010-01-11T19:57:28Z

I also tried using the xcopy /cf rather than just /c as I noted in one of the comments and I got the same result, still a CRC error. I am hesitant to try a SpinRite fix before I have some kind of backup made in case I make it worse.

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Comment from Bruce on 2010-01-11

2010-01-11T13:10:25Z

I tried the copy to NUL and confirmed the error is with the file. HOWEVER, I tried the 2nd step of xcopy /c and that, too, failed with the same CRC error. I was hopeful but it came back as 0 files copied.
Now what? Or is the next step to try and repair through something like SpinRite or Outlook PST Repair? I need to fix this so I can transfer it to my new laptop. Is there a risk in trying to fix it that I will render it unusable?

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Comment from Kenneth on 2010-01-03

2010-01-03T16:29:21Z

First copying the file normally to any location through copy-dialog in windows explorer was impopssible due to CRC fail.

than copying through cmd.exe to location "nul" went nice, then the extended /C copy failed due to CRC fail.... Why fail?? Why stop due to CRC when /C-copying? I'm sad now.

Here is cmd-text:

C:\Documents and Settings\Kikki.KIKKIS.000\My Documents\Azureus Downloads\El Lab
erinto Del Fauno[DVDRip][Spanish][www.FanCluBT.com]>copy *[www.FanCluBT.com].avi
nul
El Laberinto Del Fauno [DVDRip][Spanish][www.FanCluBT.com].avi
1 file(s) copied.

C:\Documents and Settings\Kikki.KIKKIS.000\My Documents\Azureus Downloads\El Lab
erinto Del Fauno[DVDRip][Spanish][www.FanCluBT.com]>xcopy /C *Rip][Spanish][www.
FanCluBT.com].avi E:\Peliculas
C:El Laberinto Del Fauno [DVDRip][Spanish][www.FanCluBT.com].avi
File creation error - Data error (cyclic redundancy check).

0 File(s) copied

C:\Documents and Settings\Kikki.KIKKIS.000\My Documents\Azureus Downloads\El Lab
erinto Del Fauno[DVDRip][Spanish][www.FanCluBT.com]>

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Comment from Sebastian on 2010-01-02

2010-01-02T13:36:08Z

I want to install a game from a cd.
But it stopped by CRC problem.
My question is which hard disk of mine that have some bad sector?
I have 2 hard disk
Thanks

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Comment from phil baker on 2009-12-31

2009-12-31T23:40:19Z

Hi Leo,

I've been trying to fix cyclic redundancy error in Outlook for a good two or three days. We have Outlook 2000, and resolving this is proving to be incredibly difficult. We're trying to get away from paying by the hour on the phone with Microsoft, 'Outlook PST Repair' seems innocent and truly there in the spirit of helping, but choosing files??? huh????? Baffling. Our cable service provider used to IT support of 2000 in the old days, but they don't anymore.

My question, as the problem's probably hopeless, is can we download latest ver of Outlook X and retrieve all the old stuff AND keep our old email addresses? From what I read, the 'cyclic redundancy check' is a 'game over' thing. If you could be so kind as to advise, I'd really appreciate it. Life without email doesn't feel very good.
thanks, and Happy New Year

CRC errors have nothing to do with your email address, they are simply a problem with a file on your hard disk. In this case the file is your Outlook PST file. I'd have you follow the suggestions outlined in this article. There's nothing that would cause you to lose your email address.

01-Jan-2010

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Comment from Jimmy Read on 2009-12-30

2009-12-30T08:14:32Z

CRC errors are generated because there are some bad sectors in the hard disk. These bad sectors might have damaged the PST file that you are trying to copy and hence the CRC error is generated. In order words, the PST file that you want to copy is damaged and corrupted.

Go to C Drive> Program Files> Microsoft Office> Office 2007. After doing this you will see the PST files. Right click on it and go to the Properties and then select the Compatibility tab. Click on it to clear down all the Compatibility Mode Check Box. After doing so, click on Apply and then press OK. Restart the computer and your problem is sorted out.

If still the problem persists, then opt for any 3rd party Outlook PST Repair software to get rid of the CRC errors in Outlook and repair the damaged PST files.

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Comment from Robin Clay on 2009-12-29

2009-12-29T18:54:22Z

Kevin wrote, September 17, 2009 11:38 PM

"What is correct format? I know the path C:\Documents and Settings\Kevin\Local Settings\Application Data\Microsoft\Outlook but any time I type any variation of this it tells me "whatItype" is not recognized as an internal or external command."

He received no response.

Here it is !

He should type (after the "C:\>") :-

C:\> CD "C:\Documents and Settings\Kevin\Local Settings\Application Data\Microsoft\Outlook"

DOS screeches to a halt at the first space (between "Documents" and "and"), so you have to enclose the path by quotation marks, as above.

But YOU knew that ;-)

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Comment from Darius King on 2009-12-24

2009-12-24T18:31:04Z

Is there a deleting equivalent to 'xcopy'?

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Comment from arjun007 on 2009-12-23

2009-12-24T05:48:41Z

i have already change my harddisk.but problem is still remain.so please give me tips to fix the problem of crc error while install any type of game.

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Comment from harry on 2009-12-19

2009-12-19T13:26:03Z

Hey i just had the problem. I was trying to burn a disk from my laptop while laying on the bed. Because i the laptop was slightly tilted i think it came up with the error but when i put it on a flat surface it worked.

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Comment from amel on 2009-11-28

2009-11-28T08:31:08Z

hi everybody

i just had a failure of my portable hard disk drive. It gives me CRC notification.
When i connect to laptop, system cannot read it.

How do i solve this?
Please help me, teach me step by step.
I have very important files in it.
TQ

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Comment from Chuck Simpson on 2009-10-24

2009-10-25T05:07:53Z

Just wondering Leo, don't you think it is more advisable to just replace the drive, is total failure not eminant.? when it starts to spit out crc errors. My neighbor brought me a laptop that would not boot, I installed a new operating system onit and it was fine untill I started installing programs and got crc errors. Check disk reveiled a bad block chkdsk /r found dozens of orphaned files,is this not the pretence of doom for this drive? And lastly what article at the top of this page are you refering to that I should read or this post will be ignored, I clicked on "Read the article at the top of this Page" but fail to see the relevance, with all due respect. I gave them a two year old drive from one of my machines and in 3 weeks it failed on them. They must have dropped it or the dog knocked it off the table, so why not tell people that it could be the end of the line for their drive and casper it to a new drive and remain worry free for a few years.
Later
Chuck

The article at the top of the page is the article you're commenting on. People regularly post comments when it's clear that they haven't even bothered to read the article, hence my admonition that they do so.

As for advising them to discard a drive - it's a tough call. The fact is that a "rash of CRC errors" need not mean that the drive is about to fail completely. It could, of course, but it's also not guaranteed. Very often running a tool like SpinRite will both recover the data (something giving up will not do), and refresh the media such that the bad areas are either repaired (magnetic errors) or avoided (physical errors). Data recovery is, after all, an important consideration. With drives being as cheap as they are these days, it's hard not to argue for replacement if recovery isn't an issue, but even then it's not always a simple call.

25-Oct-2009

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Comment from DragonWingz on 2009-10-21

2009-10-21T21:41:37Z

This also happened with DvDs while using DvD Shrink on protected discs. This will fix your DvD problems:
Cyclic Redundancy Check Error � Data Error While Burning Dvds

.-=DragonWingz=-.

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Comment from Dan on 2009-10-15

2009-10-16T04:49:05Z

Hey Leo, I dont understand the command prompt functions. if i get a crc error on drive F, how would i type it in on the command prompt? thanks

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Comment from Kevin on 2009-09-17

2009-09-18T06:38:03Z

Hello Leo I have a very basic question. I am trying to follow the instructions; however, I do not know what exactly to type into the first command prompt to tell it where to find the file. What is correct format I know the path C:\Documents and Settings\Kevin\Local Settings\Application Data\Microsoft\Outlook but any time I type any variation of this it tells me "whatItype" is not recognized as an internal or external command. I am using Windows XP...

Much thanks !

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Comment from Kaizer Christ on 2009-08-31

2009-08-31T17:02:37Z

hello everyone....i believe i have had this CRC error long time ago...the problem may look little but can be very effective since using variable registry softwares and change of directory doesnt actually solve the problem....the first time i had this problem i tried every possible way to fix the problem...but later on i found the only issue tht has brought to this problem is the RAM itself....sometimes the RAM may work well but not necessarily the RAM is working well for installing softwares or games....i suggest tht a RAM checkup is necessary orelse the only other issue can be coz of the Motherboard...

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Comment from William Surya Permana on 2009-07-07

2009-07-08T06:54:45Z

When I tried "C:\>CHKDSK /R"
The console said:
"The type of the file system is NTFS.
Cannot lock current drive."
What should I do?

It should also have asked if you want to schedule the chkdsk for the next time the system is rebooted. Say yes.

- Leo
08-Jul-2009

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Comment from YUREX on 2009-06-15

2009-06-15T16:09:54Z

Leo, thanks a million!

XCOPY /c failed three times. I then used the XCOPY with /cf attributes and that worked!

I was able to copy and read the corrupted excel file!

Thanks Again,

Sales at MantraMediaStore.com

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Comment from vinay eletem on 2009-06-06

2009-06-06T11:55:17Z

''how do i fix a crc error when i try to copy or install a file from dvd?''

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Comment from omkar singh on 2009-06-03

2009-06-03T13:22:22Z

i want instal a game name super dragonball z but some problem there i cant able to install it it so some crc error.........so how can i install it?

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Comment from adigo on 2009-03-29

2009-03-29T22:26:05Z

Thank you Leo,
I just followed your steps and after the "CHKDSK / R" I am now able to work with my files again !

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Comment from Animepsyco on 2009-03-08

2009-03-08T19:43:16Z

I have a ton of cyclic redundancy errors on my drive not only that but certain files on my drives are not showing up but I know there there but on vista I can't even open the folder without it telling me I have to reformat the disk before I can use it.WTF?

Did you read the article you just commented on? It has the steps you should take.

- Leo
09-Mar-2009

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Comment from JINNY on 2009-01-11

2009-01-11T16:10:09Z

LEO, I'm having huge problems with this CRC error. I can't install corel draw which i really need right now, and i'm installing it from free downloaded trial version from OHP of Corel. I'm having the same error, when i try to check my large format photos in a folder. My laptop just stops for a while.
And when i download some files and try to extract them using WINRAR, i get the same problem.
I've done the register cleaning, scanned with antivirus programmes.
I repaired my Windows XP for the 5th time now.
PLEASE HELP!

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Comment from Ed on 2009-01-04

2009-01-04T15:55:16Z

Hi again...A follow up to my post of October 8.

That fix didn't work long term, the Outlook.pst because corrupt again.

I believe I have a real fix for the Outlook issue. After going after many of the solutions xcopy etc, I decided to try something very basic. I exported each section of Outlook ie Calendar, Contacts...etc...etc. to a seperate file outlook calendar.pst etc on a seperate hard drive. I had 2 HD's in the system and plan to trash the bad one, only using the 2nd HD in the system once it's reformatted. I copied each folder seperately. To test it, I imported each of the pieces to the Outlook Archive file and it worked perfectly, all of the information is in tact.

One other interesting note, for those that mentioned their Outlook.pst is over 1 gig, my corupt file is 1.19 gig, the archive.pst file is only 128 meg. I guess Outlook does a great job wasting space.

I am going to move both the seperate files and the archive.pst to the new Outlook once the machine is totally refreshed.

Good luck.

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Comment from ravishekhar on 2008-12-24

2008-12-24T14:14:35Z

my system saying eror and to run chaeck disk
but when i run chkdsk on windows and ms dos it says it will be done at system restart but it not don what to do
pls can any body help me
[personal email address removed]

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Comment from Donish on 2008-12-13

2008-12-13T13:56:02Z

i recovered my data by this software CDCheck 3.1. It is free!

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Comment from doug battaglia on 2008-12-03

2008-12-04T02:40:25Z

I tried to do the procedure using the dos prompt to xcopy /c my archive.pst file that had been giving me crc errors. the xcopy /c command resulted in 0 files copied, crc. Any thing else I can try to recover this archive.pst? Thanks.

In your shoes, I'd try SpinRite. It's not free, but it could allow you to recover the file(s) on your disk in a situation like this.

- Leo
04-Dec-2008

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Comment from Garth on 2008-10-14

2008-10-14T17:03:12Z

I tried the xcopy but it gave an "Access denied" message. Also if I try the chkdsk first, and if that doesn't recover everything, can II still use spinrite later or will I have changed the structure of the file and therefore loose any chance to recover the rest?

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Comment from Sumit on 2008-10-14

2008-10-14T15:51:46Z

Leo, Can you please tell the best way to clean up the registry. above Ed mentioned that he cleaned up the registry with some tool, can you please share the name. My laptop was working fine but now its extrmely slow. Yes I installed and uninstalled lot of applications, lot of them just downloaded as free software from net.

Please help.
Thanks
Sumit

Try this article: What's the best registry cleaner?

- Leo
15-Oct-2008

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Comment from Rashin Wurie on 2008-10-09

2008-10-09T20:59:31Z

Hello leo.
I'm trying to reinsall win-xp-pro,but i keep getting this error,(data error cyclic redundancy,one of the components that windows need could not be installed).How can this problem be fixed? And how can i fix this problem if there's no operating system on my (Desktop PC? Because i'm stuck,it started 1/2way and stopped,so now i'm stuck with no os. please help me.Oh,and also i tryed to use my recovery disc,and it went 1/2way and an error popped up again please help me.

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Comment from Ed on 2008-10-08

2008-10-08T18:09:12Z

Leo, thanks for your help on this. I tried all of the above when my Outlook began having problems. It didn't work. Amazingly, I did the following:

1. Did a simple Disk Cleanup.
2. Used a utility to clean up the registry.
3. Believe it or not, DEFRAGED the harddrive.

Outlook is as good as new. It must have moved the file off of the bad areas. I did a diskcheck and yes, I had a bad areas. So now it's going to be, clean up the harddrive and get ready for a replacement, just to be safe.

I just wanted to pass this along.

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Comment from CD problem on 2008-09-30

2008-09-30T18:33:58Z

Hi, I was having trouble getting a file from a cd because I kept getting this CRC warning so I download a program called CDcheck which works wonders...

http://www.softwarepatch.com/software/cd-recovery.html

It continues to copy the file even after the CRC warning and it also works by copying from one destination to another on hard drives or folder to folder. It also gives you a detailed report of how many errors you recieved so that you can, for example, clean the cd and see if you get less errors which would mean more data would be recovered. Very usefull program I do recommend.

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Comment from RK_Tech on 2008-09-02

2008-09-02T13:36:00Z

Hi I have problem in My HDD for PST file where Bad sector is causing to read pst file. I am unable to transfer to another HDD or can not take backup for PST. I tried CHKDSK /R and SANPST but did not help. how can I fix this without buying SPINRITE, PST file is about 1.9 MB, please help me I am stuck using outlook for 3 weeks.

SpinRite remains my next recommended step. Yes, it may not work (you can get your money back, I believe), but I know of no other tool that does what it does as well as it does it.

-Leo

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Comment from Beki on 2008-09-01

2008-09-01T15:36:58Z

I have bought a WD passport essential (250 GB) external hard disk! There were some setup files (included software with synchronization and recovery)....even I didn't removed or replaced these files in WD, I tried to copy and nothing (cyclic redundancy and some I/O errors-even the usb ports are well installed -no driver problems)...then I have formatted it, and still the same problem ...Also, I read and proved your advices, and still :( nothing...Please help me, because I spend a lot of money for this device and I cannot use it.....

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Comment from M P Singh on 2008-08-21

2008-08-22T03:12:51Z

At times a file or software being downloaded from the internet may get corrupted . The corrupted file or software will not work and will give the cyclic redundancy check data error when one tries to delete it from the hard disk. Running CHKDSK can help in deleting the file or software completely.

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Comment from Chris on 2008-06-17

2008-06-17T23:27:13Z

Hello leo.
I'm trying to reinsall win-xp-pro,but i keep getting this error,(data error cyclic redundancy,one of the components that windows need could not be installed).How can this problem be fixed? And how can i fix this problem if there's no operating system on my (ACER ASPIRE/5050 LABTOP)? Because i'm stuck,it started 1/2way and stopped,so now i'm stuck with no os. please help me.Oh,and also i tryed to use my recovery disc,and it went 1/2way and an error poped up please help me.

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Comment from Jen T on 2008-04-09

2008-04-09T19:02:31Z

Thanks for the tips! My users OST file was corrupted and I could not copy it to "null". Since we are lucky enough that we keep it on the server, I was able to delete his ost file and it re-created itself when I reopened Outlook.

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Comment from Clark Gregory on 2008-02-12

2008-02-12T14:56:41Z

Dear Leo,
I am out of ideas!

I have 1 disk 2 partitions. Back-up C: to D: with Ghost works fine. Have done it multiple times. Also Wondows / properties / Chkdsk does not find a problem. This would indicate no problem with the hard drive.

But - back-up to DVD, I get a CRC error on the last DVD consistently on both DVD-R & DVD-RWs for either partition. Got a new DVD, still get the error.

Ran �ignore bad sectors� and it seems to work.

Tried using Nero-7 backitup, still copies to multiple DVDs then fails with CRC error at the end.

So disk to disk works, but disk to DVD fails on two DVDs in the same manor and after creating first 3 DVDs correctly but on the end of the 4th.

If it�s the hard drive, why would it work disk to disk. If it�s DVD, why always on last DVD and on different DVD drives. Should I be looking at cable, mother board, etc.

I have not tried to connect the DVD as a secondary drive on the first IDE cable yet.

Many thanks,
Clark

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Comment from Anthony Terlicker on 2008-02-09

2008-02-09T13:33:43Z

I purchased a program that has an application CD and an application update CD. Then there are 6 CD's that install the data. Mostly .cab files that contain large single files that are spanned. When I get to the 5th CD, there are two cab files. one contains the remainder of the 4th CD spanned cab file and the beginning of another cab file that spans to the 6th CD. When installing, the 5th CD stalls just before the end of the cab that flows into the 6th CD, but then it pops up a window that says installation complete. it doesn't ask for the final disk and I can not access any of the data or the program at all. If I try to copy the cab or extract the file it contains, I get Cyclic redundancy error. If I copy it from cmd prompt with a c switch, it still errors CRC because it's all one big file. I tried an error fixing program that got through the file transfer to HD, and I burned it to a new disk, but it still is premature installation and won't work. The file in the cab is called rfile002.001 and spans data5.cab (disk5) and data51.cab (disk 6). any ideas? I know it is the 5th disk and not my drive.

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Comment from Mark on 2008-01-27

2008-01-27T17:52:26Z

Just quick message to Rob, I would start to break out that PST into several, perhaps by year. In my former life as an admin, I know that when you start to approach 2gb size in PST files they tend to corrupt very easily.
I used to break out users' PST files by 2002, 2003, 2004, etc, leaving the last two years or so in the current PST file.

Also, thanks for the article, it was helpful

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Comment from Bob on 2008-01-14

2008-01-14T23:59:34Z

Several people have noted that XCOPY does not, in fact copy files with CRC errors, to which Leo responded

"Folks, PLEASE read the article. The whole article. It's pretty clear:

If this copy fails, then we've confirmed that the bad sector on your hard
disk is actually being used by some portion of your file."

Leo, PLEASE read your own article, to wit, the context of the sentence you took out of context was when copying to NUL, not when using XCOPY:

"
C:\wherever>copy Outlook.pst NUL
1 file(s) copied.

This reads the entire file by copying it "nowhere". If this succeeds the problem is not actually with the file itself, but the location you were trying to copy it to. My recommendation would be to copy it to a different disk entirely, or a different machine on your local network.

If this copy fails, then we've confirmed that the bad sector on your hard disk is actually being used by some portion of your file."

AND...

"Two important things to note here: we've used the xcopy (for eXtended copy) command, and we've added the "/C" switch which keeps copying even if errors are encountered. As you've already experienced, the default behavior of both COPY and XCOPY is to stop if an error occurs.

Now that we've got a "no worse than" backup copy, we can start attempting to repair the disk. "

All of this was a discussion of recovering a single file. You failed to recognize that XCOPY skips a file with a CRC error and keeps copying OTHER files, rather than stopping altogether. This is irrelevant when attempting to recover a single file.

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Comment from A on 2007-09-26

2007-09-26T11:36:58Z

I tryin to copy avi files from a dvd . The files Seem so play usin media player or win amp but gets stuck at certain point . . Some copy and play perfectly others say cyclic refuncy check . . How can i copy these files which play but dont copy . . I tried to copy it to another removal disc so its not my hard drive that has a problem . .Wat do i do

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Comment from Rod Beckwith on 2007-08-30

2007-08-30T16:50:40Z

Hi Leo,

All I can say is THANKS for introducing me to Spinrite...had a little trouble with my bios at first, but the tech support got right back to me with the solution and now I have fully recovered my 1.7GB PST file.

I HIGHLY recommend Spinrite to anyone having problems with their HD.

Thanks again,

Rod

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Comment from Leo A. Notenboom on 2007-08-20

2007-08-21T00:14:37Z

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Folks, PLEASE read the article. The whole article. It's pretty clear:

"If this copy fails, then we've confirmed that the bad sector on your hard
disk is actually being used by some portion of your file."

You have a bad sector on your hard disk.

Again, as the article outlines: chkdsk may help, spinrite stands a very good
chance of helping.

But some CRC errors cannot be corrected. Again quoting the article:

"At this point, if none of the steps above have repaired the bad sector or
otherwise recovered your file, you're just a little bit screwed."

I hate to see everyone waiting for a response from me, when my answers to your
questions are already in the very article you're commenting on.

PLEASE read the article.

Leo

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Comment from Leo A. Notenboom on 2007-07-15

2007-07-15T22:52:32Z

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

If you're positive that the files can all be played completely, then they can
be read, and I would assume that the CRC error is happening on the device
you're writing too. Try copying them to a different drive or device.

Leo

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=u6UN
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Comment from Salman on 2007-07-14

2007-07-14T18:08:04Z

Hello My name is Salman from Afghanistan.I have some sound files in a CD. There are about 70 .RM files on a CD all of them are fine but when I want to copy some of them there is this error.
I read the above instruction. but I want to ask you that is there a software to fix it? is there a good way to solve it?
because I need my files please tell me about it as sson as possible.the file itself is fine it works and can be read. but when I want to copy there is this error Data Error (Cyclic Redudancy Check) What should I do with this error? Thank you very much

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A comment on: How do I fix a cyclic redundancy check error when I try to copy a file?

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Comment from Jim Witkam on 2007-06-17

2007-06-18T04:02:33Z

Correction regarding my own previous post:
In fact there actually was a bad sector, when I did a real CHKDSK (from the command line), and some of my Outlook data was lost.

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Comment from Jim Witkam on 2007-05-03

2007-05-03T10:41:13Z

Hi Leo,

I also got a "cyclic redundancy check error" when trying to copy my Outlook.pst file. Interestingly, I never got any crc errors with any other file on this harddisk and I don't even use Outlook very much (hardly at all in fact).

What's more, I found your webpage because I googled for "hard disk error bad sector cyclical redundancy", so I wasn't even looking for Outlook related information.

All this makes me suspect that Outlook somehow "creates" these errors. (CHKDSK didn't report any bad sectors anyway).

Hope this info is useful somehow.

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Comment from Leo Notenboom on 2007-03-23

2007-03-24T00:46:06Z

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It sounds like the CRC error is in the filesystem itself, not one of your
files. This is actually more dangerous because if the filesystem itself becomes
corrupt you could loose multiple files.

I'd strongly recommend the SpinRite, or at least the CHKDSK options noted in
the article.

Leo
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Comment from Ileana G. on 2007-03-22

2007-03-23T01:49:34Z

Hey Leo,

First off I want to thank you for your site. It's incredibly helpful when things like DELL Help Center fail to come through.

But I do have a problem. I know the above article deals with copying a file, but my problem is deleting a file. I first got the cyclic redundancy check error message when I tried to empty my Recycle Bin. A window popped up stating the following:

Cannot delete Dc224: Data Error (cyclic redundancy check)

Well, I'm sure its a particular file that's the problem, because I can go into the Recycle Bin and manually delete everything. But even if I delete all the files shown, the recycle bin still reports the presence of one file. I believe that one of the files I tried to delete did not do so completely. But I'm not sure. I'm not sure where to go from here. Should I even keep deleting the files in the Recycle Bin one by one?

Up till now, my computer hasn't had any problems and now this. It's always something.

Even if you don't reply, your article was incredibly helpful in informing me of this type of error. Thanks for your time.

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Comment from Leo Notenboom on 2007-03-14

2007-03-15T01:45:48Z

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Not that I'm aware of. I'd recommend backing up and copying off as much
of that hard drive as possible, and replacing it.

Alternately, you might try getting and running spinrite - it may be able
to recover/repair the drive. http://www.grc.com/spinrite.htm

Leo
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Comment from Nicole S. on 2007-03-14

2007-03-14T21:07:22Z

Hi Leo,

First of all I just want to let you know how critical and helpful your site has been, particularly this page. Maybe you don't think about it but you are really able to have a huge impact on people's lives.

For example, my boyfriend is a grad school student in the middle of an important project with a deadlne, and as is usually the case, his computer crashed at the worst possible time. I'm helping him by trying desperately to back up his data and save his hard disk because he can't, and because I have a little more computer experience than he does; without having found your site on my computer we would not have known what the "cyclic redundancy" message we kept getting was. It is a good thing we ran the check disk command when we did because every time we started his computer, even in safe mode, more data was being lost to the point where we were almost unable to start it at all the last time. So without your help, we would have a huge loss on our hands, and being students we just don't have the money to buy a new computer. I just wanted to say thank you very much for what you do! You are indeed a lifesaver- or at least a semester-saver!

One question I have- Running the chkdsk command, literally hundreds of bad clusters are being repaired. After the scan is done running, will we be able to access any record or list of what has been repaired? There are simply too many to keep track of, and seemingly no way to save.

Thanks again, Leo!

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