Windows 7 Forums

Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.


Windows 7: CRC errors with large files...

10 Apr 2010   #1
baralheia

Windows 7 Ultimate N x64
 
 
CRC errors with large files...

Hello all. First time poster here, and I've got a doozy of a problem. I just hope this is in the right section. Pretty much all large files are corrupt if I save them to either of my hard drives. The limit seems to be somewhere around 30mb... under that I'm fine, over that I get CRC errors out the wazoo. I get occasional glitches in Windows, and I tried to run System File Checker, but it couldn't repair a LOT of stuff, complaining of hash mismatches. I've run Scandisk and it doesn't find any problems. I ran MemTest86+ for 48 hours, without a single memory error. I've used SeaTools for Windows and both drives pass all tests; SeaTools for DOS reports the drives are fine but the file system has errors it can't fix. I ran SpinRite through on both drives... Took it a couple of days but came back without any unusual errors. I can't for the life of me figure out what's going wrong... Can anyone point me in the right direction here?

System specs can be accessed below on the "My System Specs" link.


My System SpecsSystem Spec
.
10 Apr 2010   #2
whs
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

That sounds like a corrupted MFT. Have a look at this: (check the web - there are more tools)

The MFT (Master File Table) is sometimes corrupted. If Microsoft's Checkdisk (chkdsk) failed to repair the MFT, run TestDisk. In the Advanced menu, select your NTFS partition, choose Boot, then Repair MFT. TestDisk will compare the MFT and MFT mirror (its backup). If the MFT is damaged, it will try to repair the MFT using the backup. If the MFT backup is damaged, it will use the main MFT.
If both MFT and MFTMirr are damaged and thus cannot be repaired using TestDisk, you might want to try commercial software like Zero Assumption Recovery, GetDataBack for NTFS.

Source: http://www.cgsecurity.org/wiki/Advanced_NTFS_Boot_and_MFT_Repair
My System SpecsSystem Spec
11 Apr 2010   #3
baralheia

Windows 7 Ultimate N x64
 
 

Okay, so I tried TestDisk and followed your instructions. It asked me if I wanted to fix the MFT mirror from the main MFT, I told it yes, and then it said "Failed to fix MFT mirror: Write error." Ooh boy. This doesn't look good.

A friend of mine suggested that perhaps the issue is not with the drive, or data on the drive, but instead it's in the SATA controller on my motherboard... It was my understanding, though, that if a hard drive controller was going south, you'd see errors in HDD testing tools like SeaTools. Would this be correct, or is this line of thinking way off base?
My System SpecsSystem Spec
.

11 Apr 2010   #4
CommonTater

XP Pro SP3 X86 / Win7 Pro X86
 
 

Quote   Quote: Originally Posted by baralheia View Post
Hello all. First time poster here, and I've got a doozy of a problem. I just hope this is in the right section. Pretty much all large files are corrupt if I save them to either of my hard drives. The limit seems to be somewhere around 30mb... under that I'm fine, over that I get CRC errors out the wazoo.
First step... check your cables and power connectors... It wouldn't be the first time a bad or dirty connection has sent techs flying off in a dozen directions....

If your drives are passing all non-FS diagnostics (i.e. Read/Write/Erase stress testing) it's likely you don't have a serious hardware problem. More likely you have somehow managed to corrupt your file systems ... and when that happens, the first step is a virus scan... to play it safe.

The next step is to ensure that you have proper drivers installed for your SATA controller... Check Device Manager and if there's a newer version, get it... If not, try an older version... It's entirely possible the current driver is a bit buggy...

To attempt to fix the File System corruption use CHKDSK /F /R C: from a CMD window... Note: C is the letter indicating the drive to be tested... sub in your own drive letter as needed. This is going to take a while... with 500gb drives, about an hour to 90 minutes each. Please note that when you go to do your system drive it will want to schedule it for the next reboot and you should play along...

There are third party tools but frankly I've never trusted them or found need of them.

In the extreme... You end up doing a fresh install, using the windows installer's partitioning tool to destroy and recreate all partitions on your system.
My System SpecsSystem Spec
11 Apr 2010   #5
CommonTater

XP Pro SP3 X86 / Win7 Pro X86
 
 

Quote   Quote: Originally Posted by baralheia View Post
A friend of mine suggested that perhaps the issue is not with the drive, or data on the drive, but instead it's in the SATA controller on my motherboard... It was my understanding, though, that if a hard drive controller was going south, you'd see errors in HDD testing tools like SeaTools. Would this be correct, or is this line of thinking way off base?
Yep... Diagnostics are written specifically to find problems with hardware. If the thing passes the diagnostics it's a pretty fair bet it's ok.
My System SpecsSystem Spec
11 Apr 2010   #6
whs
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

Quote:
To attempt to fix the File System corruption use CHKDSK /F /R C: from a CMD window... Note: C is the letter indicating the drive to be tested... sub in your own drive letter as needed.
CHKDSK C: /F /R might work better
My System SpecsSystem Spec
11 Apr 2010   #7
CommonTater

XP Pro SP3 X86 / Win7 Pro X86
 
 

Quote   Quote: Originally Posted by whs View Post
Quote:
To attempt to fix the File System corruption use CHKDSK /F /R C: from a CMD window... Note: C is the letter indicating the drive to be tested... sub in your own drive letter as needed.
CHKDSK C: /F /R might work better
Just a simple question...
Did you try it my way and see what happens?
Did you try it your way and see what happens?

Really... It might be an idea to check these things before you go correcting people...
My System SpecsSystem Spec
11 Apr 2010   #8
whs
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

Quote   Quote: Originally Posted by CommonTater View Post
Quote   Quote: Originally Posted by whs View Post
Quote:
To attempt to fix the File System corruption use CHKDSK /F /R C: from a CMD window... Note: C is the letter indicating the drive to be tested... sub in your own drive letter as needed.
CHKDSK C: /F /R might work better
Just a simple question...
Did you try it my way and see what happens?
Did you try it your way and see what happens?

Really... It might be an idea to check these things before you go correcting people...
No, I did not check it your way. I just suggested the "official" cmd syntax. But maybe you can tell me what your way does in contrast to the cmd syntax. All I know is that cmd is very iffy when it comes to syntax errors.

CHKDSK [volume[[path]filename]]] [/F] [/V] [/R] [/X] [/I] [/C] [/L[:size]] [/B]

volume Specifies the drive letter (followed by a colon),
mount point, or volume name.
filename FAT/FAT32 only: Specifies the files to check for fragmentation
/F Fixes errors on the disk.
/V On FAT/FAT32: Displays the full path and name of every file
on the disk.
On NTFS: Displays cleanup messages if any.
/R Locates bad sectors and recovers readable information

PS: I just checked your way. It does work. I apologize - did not mean to be wise guy. That is the first time that cmd works when I deviate from the given syntax.
My System SpecsSystem Spec
11 Apr 2010   #9
CommonTater

XP Pro SP3 X86 / Win7 Pro X86
 
 

Quote   Quote: Originally Posted by whs View Post
PS: I just checked your way. It does work. I apologize - did not mean to be wise guy. That is the first time that cmd works when I deviate from the given syntax.
Ok... apology accepted.

FYI... I've been working professionaly in computers since before MS-DOS. I started out as a service tech working on IMSAI and ALTAIRE *kits* then moved over to the Intertec Superbrain, Victor 9000 and then PCs. I'm pretty sure that when I quote a simple dos command I'll get it right.
My System SpecsSystem Spec
11 Apr 2010   #10
whs
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

Quote   Quote: Originally Posted by CommonTater View Post
Quote   Quote: Originally Posted by whs View Post
PS: I just checked your way. It does work. I apologize - did not mean to be wise guy. That is the first time that cmd works when I deviate from the given syntax.
Ok... apology accepted.

FYI... I've been working professionaly in computers since before MS-DOS. I started out as a service tech working on IMSAI and ALTAIRE *kits* then moved over to the Intertec Superbrain, Victor 9000 and then PCs. I'm pretty sure that when I quote a simple dos command I'll get it right.
Thanks for your generosity. Unlike you, I spent my life on large systems (since 1961) and am still wrestling with the intricacies of the PC. But with some patience, I might get there - if I live long enough, LOL. The forums are a great asset in this regard.
My System SpecsSystem Spec
Reply

 CRC errors with large files...




Thread Tools




Similar help and support threads
Thread Forum
cannot copy large RAR/ISO files
Well I've been browsing a lot of these threads, and I've come across topics similar to mine, but none have solved this problem. Basically, I am running Windows 7 64bit on an Intel core duo HP pc. I'm trying to copy RAR or ISO files larger than 4 gb's from a Maxtor external hard drive onto my pc's...
General Discussion
Copying Large Files
Is there any way to copy a large file of 8 GB and above from one directory to another in an NTFS system?:cry:
General Discussion
Checking Drives for errors and difference between portable and large
I was wondering what the best way to make sure your external drive is functioning as it should? Also, how much damage is done if your drive loses power abruptly? Also, why would someone want a larger drive that needs an additional power source compared to a portable drive?
Hardware & Devices
How to stream large files
Greetings, I need to stream large files between two computers (htpc & other is just for storing large files) that are separated by a wall. Both are connected to powerline network adapters and a third computer has a powerline adapter hooked up to a wireless router, all are connected via windows...
Network & Sharing
How do I identify large files on my HDD?
Hello everyone, I have recently started using iPhone with Windows 7, and I *think* that some of the videos and photos transferred from iPhone to Windows 7 HDD may be using up much of my HDD space. Besides the obvious: Checking each file and folder for size and contents, is there a...
Performance & Maintenance
Copying Large Files
I am having some problems copying large files to my computer from an external hard drive. The copying process starts but then seems to freeze after a couple of minutes. Is this happening to anyone else and is there anything I can do?
General Discussion


Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd

All times are GMT -5. The time now is 19:30.
Twitter Facebook Google+ Seven Forums iOS App Seven Forums Android App