Become a and go ad-free! In the file or not?We’ll start by making sure the problem is actually with the file being copied, since it’s also possible the problem is with the location being copied to.It’s a two-step process using Command Prompt. “CD” to the folder in which the file resides. Copy the file to NUL.NUL is a special device file name that means “nothing”, so this operation copies the file to “nothing”. This is helpful because we know the only disk access that will happen is to read the file; there’s no attempt to write to the disk.First, locate the file. If you’re not sure where a PST file is, has instructions to find it. As an example, my file is at “C:UserslnoteDocumentsOutlook FilesOutlook.”.Run Command Prompt, and enter the two commands corresponding to the two steps we listed above:CD “C:UserslnoteDocumentsOutlook Files”copy Outlook.pst NUL(Replace my example location or file with yours, of course.)If a copy to NUL works without reporting an error, the problem is likely not with the file itself, but with the location you were trying to copy it to.

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My recommendation would be to copy it to a different disk entirely — perhaps a stick, external drive, or something else.If the copy to NUL fails with a CRC error, then we’ve confirmed the bad on your hard disk is actually being used by some portion of the file. Try to fix the fileIf the problem is in the file itself, we start by making as best a copy of it as we can. This preserves a copy in a state where “it can’t get any worse than this”. When all else failsIf none of the steps above repair the bad sector or otherwise recover your file, you’re a little bit screwed.It’s now time to work with the best-effort file you saved earlier and, depending on what kind of file it is, try to recover the contents. In your example, an Outlook PST file, that means running scanpst on it, which will scan the contents of the file and attempt to recover what it can. There will most likely be data loss — sometimes a lot of data loss.That’s why I encourage you to never run utilities like scanpst on your only copy of the file. You always want the original to go back to in case there’s something else in it you can recover manually.For other types of files and applications, it’ll depend entirely on the specifics of that application as to how it deals with a partially corrupt file and whether it can be repaired.

The lesson to learnWhich brings me to my last point.If this is the only copy of the file — if you will suffer significant data loss if this file has been damaged — then apparently you haven’t been backing up.Start. Now.This was a wake-up call. Even if you successfully recover your file, you should be scared.Start backing up your important data.

In fact, start backing up everything, whether you think it’s important or not.The next time there’s a problem, you may not be as lucky. Windows Explorer is a fine tool, but there are still a few things you can't easily do with it. This calls for the Windows Command Prompt.

EaseUS Todo will throw an error if one of the partitions you want to back up has an error, or isn't in an understandable format. I'll walk you through your options. Fragmentation is about how a file is stored on a disk and is not preserved across a copy. In fact, in some cases you can defragment a hard drive using copy.

If CHKDSK freezes when you run it, you may have a problem with your files or hard disk. But don't blame CHKDSK for the problem.Footnotes & references: I’m looking for a good alternative that would give us the same surface-repairing results.Posted: June 28, 2018in:This is an update to an article originally posted February 15, 2007Shortlink:Tagged:. New Here?Let me suggest my to get you started.Of course I strongly recommend you - there's a ton of information just waiting for you.Finally, if you just can't find what you're looking for,! Leo Who?I'm and I've been playing with computers since I took a required programming class in 1976.

I spent over 18 years as a software engineer at Microsoft, and after 'retiring' in 2001 I started in 2003 as a place to help you find answers and become more confident using this amazing technology at our fingertips. 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!. 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. The dhandho investor by mohnish pabrai pdf reader. 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.

—–BEGIN PGP SIGNED MESSAGE—–Hash: SHA1It sounds like the CRC error is in the filesystem itself, not one of yourfiles. This is actually more dangerous because if the filesystem itself becomescorrupt you could loose multiple files.I’d strongly recommend the SpinRite, or at least the CHKDSK options noted inthe article.Leo—–BEGIN PGP SIGNATURE—–Version: GnuPG v1.4.6 (MingW32)iD8DBQFGBHSXCMEe9B/8oqERAh9LAJ9yLp8j2IStoYUAgwf72y2iKqRKiACdFNKE3O5FomBUEN1Po+og14WRZ9I27sg—–END PGP SIGNATURE—–. 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. 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. —–BEGIN PGP SIGNED MESSAGE—–Hash: SHA1Folks, 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 harddisk 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 goodchance 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 orotherwise 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 yourquestions are already in the very article you’re commenting on.PLEASE read the article.Leo—–BEGIN PGP SIGNATURE—–Version: GnuPG v1.4.7 (MingW32)iD8DBQFGyi6ECMEe9B/8oqERAj/8AJ9LBsNb6nRFpVrRvoPZNDreOSQ95QCfXWGLa/hlvSsdNa/tBNknOENW+g43vo5—–END PGP SIGNATURE—–.

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 harddisk 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:wherevercopy Outlook.pst NUL1 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. 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). I know it is the 5th disk and not my drive. 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 🙁 nothingPlease help me, because I spend a lot of money for this device and I cannot use it. 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 wondersIt 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. 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.Ed. Hi againA 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, Contactsetcetc.

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.Ed. 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!.

Hello everyone.i believe i have had this CRC error long time agothe 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 problembut 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. 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.LaterChuck. 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. Kevin wrote, September 17, 2009 11:38 PM“What is correct format? I know the path C:Documents and SettingsKevinLocal SettingsApplication DataMicrosoftOutlook 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 SettingsKevinLocal SettingsApplication DataMicrosoftOutlook”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 😉.

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 software to get rid of the CRC errors in Outlook and repair the damaged PST files. 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??? 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. 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 stop due to CRC when /C-copying? 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:. 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.

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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.

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. I read recently on the net that rubbing a banana on your unplayable, scratched DVD fixes it. 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. 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. 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 tooso i guess my next step is to try Spinrite. Wish me luck!cheers and THANKSPeter “Fish” Fisera. 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!. 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. 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” softsareExcellent,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.

For me, the xcopy failed with error “File creation error – Data error (cyclic redundancy check). Then I tried chkdsk like you suggested. Chkdsk seems to go into an infinite loop.

In the first pass, it completes the 5 stages of DASD cehcks. It also fixes two files with messages like “windows replaced bad clusters in file 28294 of name “. Then it reboots and windows XP gets to chkdsk again. I can barely see messages like volume is clean and Windows has just finished chkdsk. And there comes the BSOD (blue screen of death). This cycle has repeated at least thrice with exactly the same results each time. I guess this is some iNifinte chkdsk loop.

The BSOD by the way is about SESSION5INITIALIZATIONFAILED.does it mean I should not hope to recover this file I have? Or the only hope is to go for some kind of commercial recovery softwares? Notenboom,This is Chandrasekar, even for me also I have faced this problem that if I have copy the Outlook pst data file to any other location while copying process at the end of the stage it will say that ” Data redundancy check error”I have done all excerise that chkdsk /r /f & scandisk ( virus scan) and scan the PST recovery tools, XCOPY, Copy.there is no possible results,Simple way but we have to check,Finally, I used to recovered the NTBACKUP tool to backup the PST files, restore in another disk. Work was done not this was resolved my issue& It Works.Regards,J Chandrasekar. Dear Leo,Thank you very much Leo for your advice on spinrite.When I read your suggestions I decided to buy my own copy.

I have run spinrite, first at recovery level and later again level 5.spinrite fixed all the bad spots and even succeeded in recovering 25 lost files. Just one file was left unrecovered. Lucky for me it was not an important file. I am vigourous in making online and offline backups with acronis, which was how I discovered that bad spots were starting to arise. I will follow spinrites advice to regularly run it in order to prevent near future bad spots occuring, or if they do, to be in time to mark them as unusable.Thanks again; $89 well spent.greetings,Richard. Over my years in computer & network (well i wouldn’t say network at this point cuz i can only fix what’s happening on the clientside) repairs this is the first kind of problem that i’ve encountered, February 2016, mark the spot.

That me & a bunch of other network technicians in google.com, can’t figure out. (checked the whole internet for anyone who had pin-point the problem, no luck.). I suspect modem or the ISP side at this point. Planning to call on their technician to either check the physical connections or force them to download something at my end that is not corrupt.my problem is the CRC failure only happen to huge files. It turns the text files in those big files into gibberish which shows corruption of course. I did checked my RAM, hard disks, spyware, viruses, defragmentation, drivers update, safe mode, unsafe mode, everything pass. Rolled back drivers on the network card & nothing wrong with that.

Then check the modem for packet loss, some ping tests, called the ISP if there’s problem on their side. Its like im on weed or something. Problem is there but at the same time problem isn’t there. Heck i even thought windows update causes it and started to uninstall all the window update i downloaded this year.

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And surprise surprise, nothing came up. Diagnose shows that all of my network and laptop is running smooth as a baby butt.so my final attempt to diagnose this, is to borrow someone else working laptop and try to download from their’s, if it comes out okay then BAM.

My laptop’s faulty. But if its CORRUPTED. I will buy weeds and smoke it. Before i drag the ISP technician ass here and not make him leave until he fixes it.

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