Windows 7 64-bit Corrupting (Altering) Large Files Copied to External NTFS Drives
http://social.technet.microsoft.com/Forums/en-US/w7itproperf/thread/13a7426e-1a5d-41b0-9e16-19437697f62b/
continue to this thread, I have the same problems, the corrupted files only archives, zip or 7z ... and exe, there are no problems copying larg files like movies for example, no problem when copying via linux in the same laptop, it is a windows issue, I
have all updates installed, nothing missing
Ok, lets be brief.
This problem is annoying me for years. It is totally reproducible although random. It happens when copying to external drives (mainly USB) when they are configured for "safe removal". I have had issues copying to NTFS and FAT32 partitions. I have had issues
using 4 different computers, from 7 years old to brand new ones, using AMD or intel chipsets and totally different USB controllers, and using many different USB sticks, hard disks, etc. The only common thing in those computers is Windows 7 x64 and the external
drives optimization for "safe removal". Installing Teracopy reduces the chances of data corrpution, but does not eliminate them completely. The only real workaround (tested for 2 years) is activating the write cache in the device manager properties of the
drive. In that way, windows uses the same transfer mechanisms as for the internal drives, and everything is OK.
MICROSOFT guys, there is a BIG BUG in windows 7 x64 external drives data transfer mechanism. There is a bug in the cache handling mechanism of the safe removal function. Nobody hears, I've been years talking about this in forums. It is a very dangerous bug
because it is silent, and many non professional people is experiencing random errors in their backup data. PLEASE, INVESTIGATE THIS. YOU NEED TO FIX SUCH IMPORTANT BUG. IT IS UNBELIEVABLE THAT IT IS STILL THERE SINCE 2009!!!
Hope this helps.
Similar Messages
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"._" files littering my external NTFS drive
I purchased a USB external drive and formatted it on my Windows PC. I wanted NTFS rather than FAT32.
I use MacFuse on my Mac in order to write to it.
I copied around 14000 files to this drive from my Mac. No issues copying.
Now, I am on vacation with my external drive and my Windows laptop. On the drive, every single file has been duplicated with a second file that starts a "._" in the filename.
I read online that this is some odd resource fork part of the file that the Mac creates when you copy stuff to a Windows formatted drive.
I want to delete all of these ridiculous files from my external drive. I found a Mac program called BlueHarvest, but for the next two weeks, I only have my Windows XP laptop.
How can I get rid of these stupid 4k files? Is there a Windows version of a program that can do this?
Apple, in the future, how can I turn off the creation of all these worthless files, especially .DS_Store, .Trashes, .Spotlight, etc.
THanks for any advice,
ChrisNo trouble in those files or in deleting them.
Watch out for file names. Things that are valid for HFS+ are not on NTFS, and caused mayham to Vista.
What I did was just search for and delete all those files you are asking about, and more, like any of the .DS also.
The files are created to store folder and file information.
What would be better would be to use a program when copying, to skip copying hidden and invisible files. And putting "." in front of a file just makes it hidden in OS X.
You can just search and delete. I had to delete tens of thousands. And I now keep all my files on NTFS that I can. I also bought NTFS driver a year ago, having tried MacFUSE also, Paragon-Software cost $29 at the time and performed better. Haven't tried the new MacFUSE 2.x that just came out. -
Network speed affected by large file copy operations. Also, why intermittent network outages?
Hi
I have a couple of issues on our company network.
The first is thate a single large file copy imapcts the entire network and dramatically reduces network speed and the second is that there are periodic outages where file open/close/save operations may appear to hang, and also where programs that rely on
network connectivity e.g. email, appear to hang. It is as though the PC loses it's connection to the network, but the status of the network icon does not change. For the second issue if we wait the program will respond but the wait period can be up to 1min.
The downside of this is that this affects Access databases on our server so that when an 'outage' occurs the Access client cannot recover and hangs permamnently.
We have a Windows Active Directory domain that comprises Windows 2003 R2 (soon to be decommissioned), Windows Server 2008 Standard and Windows Server 2012 R2 Standard domain controllers. There are two member servers: A file server running Windows 2008 Storage
Server and a remote access server (which also runs WSUS) running Windows Server 2012 Standard. The clients comprise about 35 Win7 PC's and 1 Vista PC.
When I copy or move a large file from the 2008 Storage Server to my Win7 client other staff experience massive slowdowns when accessing the network. Recently I was moving several files from the Storage Server to my local drive. The files comprised pairs
(e.g. folo76t5.pmm and folo76t5.pmi), one of which is less than 1MB and the other varies between 1.5 - 1.9GB. I was moving two files at a time so the total file size for each operation was just under 2GB.
While the file move operation was taking place a colleague was trying to open a 36k Excel file. After waiting 3mins he asked me for help. I did some tests and noticed that when I was not copying large files he could open the Excel file immediately. When
I started copying more data from the Storage Server to my local drive it took several minutes before his PC could open the Excel file.
I also noticed on my Win7 client that our email client (Pegasus Mail), which was the only application I had open at the time would hang when the move operation was started and it would take at least a minute for it to start responding.
Ordinarlily we work with many files
Anyone have any suggestions, please? This is something that is affecting all clients. I can't carry out file maintenance on large files during normal work hours if network speed is going to be so badly impacted.
I'm still working on the intermittent network outages (the second issue), but if anyone has any suggestions about what may be causing this I would be grateful if you could share them.
ThanksWhat have you checked for resource usage during one of these copies of a large file?
At a minimum I would check Task Manager>Resource Monitor. In particular check the disk and network usage. Also, look at RAM and CPU while the copy is taking place.
What RAID level is there on the file server?
There are many possible areas that could be causing your problem(s). And it could be more than one thing. Start by checking these things. And go from there.
Hi, JohnB352
Thanks for the suggestions. I have monitored the server and can see that the memory is nearly maxed out with a lot of hard faults (varies between several hundred to several thousand), recorded during normal usage. The Disk and CPU seem normal.
I'm going to replace the RAM and double it up to 12GB.
Thanks! This may help with some other issues we are having. I'll post back after it has been done.
[Edit]
Forgot to mention: there are 6 drives in the server. 2 for the OS (Mirrored RAID 1) and 4 for the data (Striped RAID 5). -
Qosmio X500-148 - Large file copy stucks
Large file copy (~5-10gb) between USB or Firewire disk stucks the PC. It goes up to 50% then slows down and there is no possibility to do anything including cancel the task or open the browser or WIn Explorer or Task manager.
Event viewer does not show anything strange.
This happens only with Windows 7 64bit - no problem with Windows 7 32bit (same external hardware). No problem when copying between internal PC disk.
The PC is very powerful - Qosmio X500-148The external Hardware is:
1.5 TB WD Hard disk USB
1.0 TB WD + 250GB Maxtor + 250GB Maxtor on Firewire
I have used standard copy feature - copy and paste - as well as
Viceversa Pro for folder sync with same results
Please note that the same external configuration was running properly on a 1 core PC - Satellite - running on Win7 x86 without problems. Since I have moved on Win7 x64 on my brand new X500-148 I have a great del of copying problems
Installed all Windows upgrade and the Event Monitor doesn't show anything strange when copying -
Unable to copy very large file to eSATA external HDD
I am trying to copy a VMWare Fusion virtual machine, 57 GB, from my Macbook Pro's laptop hard drive to an external, eSATA hard drive, which is attached through an ExpressPort adapter. VMWare Fusion is not running and the external drive has lots of room. The disk utility finds no problems with either drive. I have excluded both the external disk and the folder on my laptop hard drive that contains my virtual machine from my Time Machihne backups. At about the 42 GB mark, an error message appears:
The Finder cannot complete the operation because some data in "Windows1-Snapshot6.vmem" could not be read or written. (Error code -36)
After I press OK to remove the dialog, the copy does not continue, and I cannot cancel the copy. I have to force-quit the Finder to make the copy dialog go away before I can attempt the copy again. I've tried rebooting between attempts, still no luck. I have tried a total of 4 times now, exact same result at the exact same place, 42 GB / 57 GB.
Any ideas?Still no breakthrough from Apple. They're telling me to terminate the VMWare processes before attempting the copy, but had they actually read my description of the problem first, they would have known that I already tried this. Hopefully they'll continue to investigate.
From a correspondence with Tim, a support representative at Apple:
Hi Tim,
Thank you for getting back to me, I got your message. Although it is true that at the time I ran the Capture Data program there were some VMWare-related processes running (PID's 105, 106, 107 and 108), this was not the case when the issue occurred earlier. After initially experiencing the problem, this possibility had occurred to me so I took the time to terminate all VMWare processes using the activity monitor before again attempting to copy the files, including the processes mentioned by your engineering department. I documented this in my posting to apple's forum as follows: (quote is from my post of Feb 19, 2008, 1:28pm, to the thread "Unable to copy very large file to eSATA external HDD", relevant section in >bold print<)
Thanks for the suggestions. I have since tried this operation with 3 different drives through two different interface types. Two of the drives are identical - 3.5" 7200 RPM 1TB Western Digital WD10EACS (WD Caviar SE16) in external hard drive enclosures, and the other is a smaller USB2 100GB Western Digital WD1200U0170-001 external drive. I tried the two 1TB drives through eSATA - ExpressPort and also over USB2. I have tried the 100GB drive only over USB2 since that is the only interface on the drive. In all cases the result is the same. All 3 drives are formatted Mac OS Extended (Journaled).
I know the files work on my laptop's hard drive. They are a VMWare virtual machine that works just fine when I use it every day. >Before attempting the copy, I shut down VMWare and terminated all VMWare processes using the Activity Monitor for good measure.< I have tried the copy operation both through the finder and through the Unix command prompt using the drive's mount point of /Volumes/jfinney-ext-3.
Any more ideas?
Furthermore, to prove that there were no file locks present on the affected files, I moved them to a different location on my laptop's HDD and renamed them, which would not have been possible if there had been interference from vmware-related processes. So, that's not it.
Your suggested workaround, to compress the files before copying them to the external drive, may serve as a temporary workaround but it is not a solution. This VM will grow over time to the point where even the compressed version is larger than the 42GB maximum, and compressing and uncompressing the files will take me a lot of time for files of this size. Could you please continue to pursue this issue and identify the underlying cause?
Thank you,
- Jeremy -
if you delete a large file from the mac hard drive does it also delete it from time machine on the external hard drive ?
As the others say, no, the backup copy won't be deleted immediately, but it will eventually.
If you want to delete all backups of a selected item, such as for space or security reasons, see #12 in Time Machine - Frequently Asked Questions. -
How can I transfer files off an external hard drive formatted for windows?
I just bought my first mac (yay!) and am trying to transfer my files off of my old pc. The problem is that I stored all my personal files on an external hard drive, which is of course formatted for windows. My mac will open it, but it is "read only." I tried plugging it back into my pc and using the Migration Assistant to transfer my files over, but it was not detected (rest of the pc was).
However, the second time I tried plugging it in to my pc, it told me it would need to be formatted first. Obviously my mac has changed something on it, and now all my personal files are on a hard drive that is unusable by either my old pc or my new mac!
Any suggestions would be appreciated! Heads up though, I am not especially computer literate, and my pc needs to stay intact as the husband needs it and some of the programs on it for school. Also, I have a second external hard drive that is brand new with nothing on it, if that will come in handy.
Thanks!Format the extra HDD to EXFAT as previously indicated. There are two ways that can use to transferr the data.
1. Connect both drives to the PC and the copy the files to the newly formatted (EXFAT) drive from the HDD with the data . Then connect the EXFAT drive to the MBP and transfer the data to same.
2. Connect both drives to the MBP and open DISK UTILITY>RESTORE. Drag the drive with the data on it to the 'Source' field. Drag the EXFAT drive to the 'Destination' field. Click on the 'Restore' butt is on. After the transfer has been completed, close DISK UTILITY and place the data on the MBP where you want it.
Ciao. -
I cannot copy my doc and photos and videos from one external hard drive to a second external hard drive -- both plugged in to my MacBook Air -- I get Error 8062 and the copying (which seemed to be going on for 10 minutes) stops and nothing gets copied.
As any Macbook Air owner knows, there is SO LITTLE storage capacity on the computer that you have to back up big files onto an external hard drive to avoid getting the other annoying error that says you have no more memory/storage capacity/whatever the proper term is, and you cannot use the computer.
Backstory: Before this error cropped up, I had backed up lots of files to an external drive and then removed them from my computer. But then the external hard drive got corrupted and I could not access my entire photo library. Had to pay $850 to Kroll Ontrack to recover those files. I have now bought 2 new external 1 Terrabyte hard drives as protection against another such disaster. BUT I cannot copy the files from the first hard drive where all my reovered files now sit, to another backup hard drive.
Feeling vulnerable. Please help.
SusaninNYFrom the menu bar, select
▹ System Preferences ▹ Energy Saver ▹ Power Adapter
and uncheck the box labeled Put the hard disk(s) to sleep when possible, if it's checked.
If the drive has more than one interface (USB, FireWire, Thunderbolt, eSATA), try one of the other interfaces.
Check that the data cable is securely inserted at both ends.
Try a different cable.
If you're connecting the drive through a hub, connect it directly to a built-in port on the Mac.
If you're connecting it directly, try a different port.
Disconnect all other devices on the bus, or as many as possible.
Test the drive with another Mac. Test another drive with this Mac.
If the drive is bus-powered, but has an AC adapter, connect the adapter.
Start up in Safe Mode and test.
If the drive doesn't work under any of the above conditions, and if another drive does work with the same Mac, then the drive has failed. You may be able to salvage the mechanism by removing it from the enclosure and installing it in another one, or in a drive dock. -
I am a long time iTunes user but a new MacBook owner! I keep the majority of my music files on an external hard drive. I'm trying to view all those files on my MacBook through iTunes. With windows you would go to : File/Add To Library, and iTunes would add all your selected files to your music library BUT WOULD NOT COPY THEM TO YOUR HARD DRIVE. In other words, if the external hard drive was connected, you could listen, drag/drop, and edit the files. When I tried the same thing with my new MacBook... it actually started coping the files to my MacBook harddrive. I don't want that, it's millions and millions of mp3's that I don't want to keep on my computer, only my external hard drive. Can anyone help? I'm sure it's something easy, I'm just so new to the Mac world. Being an iPhone owner for many many years I'm picking up things fast, but this is getting the best of me! Help !
In iTunes 11 uncheck the preferences setting in in the iTunes Preferences panel "Advanced > Copy Files to iTunes Media folder when adding to Library"
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How can I copy files from an external hard drive without creating copies on the disk?
I recently purchased a MacBook Air as part of a requirement for schoolwork. I decided to use it to sync music to my iPod and iPhone, and it worked perfectly well, however, i keep most of my music files on an external hard drive. Recently, it started sending me messages about the hard drive being almost full. I checked on the about this Mac screen, and it said that up to 95 gigabytes on the disk drive had been taken up by music. This was not my intention, as i had previously assumed the music was kept on my external hard drive as it had been on windows. I attempted to delete the folder, but it now said that my disk drive was taken up by "other" files. I want to still use my iTunes without these files copying. How?
Hi flyingroastchicken,
If the songs are being stored on your Mac, then make sure that the location of where the iTunes media is being store. Take a look at the article below to verify that you have it set up the way you want.
iTunes for Mac: Moving your iTunes Media folder
http://support.apple.com/en-us/HT201562
Take it easy,
-Norm G. -
I have an iMac 2013 running OSX 10.9.4. I want to use Carbon Copy Cloner to backup user files to an external hard drive to free up space on my iMack Hard drive.
So, say I make the backup today, delete iphoto libraries from my iMac, and then backup my iMac in a week. What happens to the iphoto libraries that are on the external backup drive now that I am backing up the iMac where they no longer exist?
I will have them backed up to a separate second external drive as well.
I'm just very cautious about removing them from the hard drive.
Thanks for helping and understanding my crazy caution!I'd like to store my Aperture /IMovie Libraries on an external hard drive.
That is fine and recommended.. use the fastest disk you can afford.. ie Thunderbolt>USB3>FW800>USB2.
In addition, I'd like to partition the external hard drive so that Time Machine can use it to both back up my IMac and the external library drives.
Let me be clear.. you want to partition the one disk.. use it for TM and move your files to the external disk.. and then backup to the same disk.. You can do it.. but that is not a backup.. that is an experiment in how long you can get away with running files and backups on the same disk before you lose everything.. like Russian Roulette.. pull the trigger enough times and laws of probability will do you in.
You must have backups on a different disk .. otherwise it is pointless.
Can I set up a RAID 5 format for redundancy?
No.. you can buy special USB and Thunderbolt external drives that support RAID..
BUT that is still not a backup.. let me show why.. you make a silly move and corrupt your file in aperture.. it is not that rare.
Raid will corrupt all copies of the files.. it is replicated across all disks.
Delete a photo it is deleted across all disks.. you have no recovery.
Alway, always consider RAID system one disk.. backup onto another disk.. and if the photos or movies are at all important to you.. ie your family .. make another copy and store in a relatives house.. There is no such thing as too much redundancy. -
How do i copy my files from my external hard drive onto my imac
how do i copy my files from my external hard drive onto my imac
You should be able to 'migrate them' without having to do so during a reinstall, from an external drive. In some cases, you may be able to use TimeMachine software even if the drive had not been used as a backup.
The usual way, though, is to drag & drop copy from one to another (volume or folder) you created in there and have open. Or drag an item on top of the icon of a hard disk drive when it is mounted on the desktop. I'm used to working with open folders and windows, because that works best; and then see if I want to change how things look inside their destination. This helps should I later want to burn them to a DVD and have it correct. And I want to know where they are.
I had more links to some information about importing or migrating data into a Mac from an external, a week ago, but can't find them now. A few good links to pages, but I think I posted what I did find directly to answer someones question about it; and believe the info was in an Apple Support article about TimeMachine, near the lower part of the page with blue words with a disclosure triangle, so you could read more in that page. But I don't believe these two are correct in that TimeMachine (some versions) only allow wireless backup to a drive in a base station unit such as Apple sells, for this. The link I saw simply said how to work around not using the wireless stuff. Maybe it was a dated item, not in these?
See a main general portal to TimeMachine support,
here: http://www.apple.com/support/timemachine/
Or basics that may not provide optional copy methods:
Mac Basics - Time Machine backs up your mac:
http://support.apple.com/kb/ht1427
Perhaps a search of Apple Support database (or even ASC discussions?) would yield ideas, and perhaps find what may work for the kind of files you want to copy, and where they can be found & used later. Are the files for specific applications? Or images, music, etc?
Good luck & happy computing!
edited. -
I have macbook pro 13" I want to know how to copy files from my mac to the external Toshiba Hard Drive. I can't even delete files from my external hard drive. please help me my macbook HD is almost full and I have to copy my images to the Toshiba HD
To delete files from your external HDD, attach it to your MBP and drag the unwanted files to trash and then empty trash.
Then you select the files that you want to transfer by 'drag and drop' to the external HDD and trash the files on your MBP.
Ciao. -
Why Can't I Copy Files from an External Hard Drive or SD Card?
Major problem here... Why when I try copying files from an external hard drive or an SD card onto my internal iMac hard drive, it doesn't work? The status bar that pops up, shows that it completes the transfer of the files to 100%; however, when it does in fact finish, the files actually do not appear on my hard drive.
Any help would be greatly appreciated. This is one of many problems I have been finding with OS X Lion and am very much on the verge of going back to Snow Leopard.
Thank you.Have u tried the usual? Safe boot. Delete finder plist files? etc. And the drives are formatted for mac yes?
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i would like to copy files from an external hard drive to my Mac. I intend to do this several times. Will Mac copy the same files every time or can it segregate and only copy new files from the external hard drive?
Only copies the file or files you select. The selection will remain unless you change it in case you wish to repeat the same copy to another location. Multiple and different copy operations can be run simultaneously.
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