Copying files between hard drives problem

Hello

I have problems copying files between hard drives on my computer. I was having this problem on Windows 7 and Windows Vista, but never met him on XP.  It seems that there are several similar topics, but I think I've noticed a few oddities in my own experience...

I have several drives, between 500 GB ~ 1 TB.  Problems arise when I try to copy a folder with a large number of files (pictures, records about 4 GB in size, typically).  Initially, the transfer rate would be HD burst speed, somewhere between 90 MB to 150 MB.  Speed would be reduced to about 30 MB, or even lower.  The transfer ends by becomes so slow that the operation would take hours to complete.  If I try to cancel, it would take minutes to do.  The computer run slowly for a long period of time, with an offset of intermittent until I have to reboot the system.  This occurs regardless the source and destination drives.

On some Samsung drives, this problem is actually lead to the corruption of data on the source and destination drives and i/o error messages.  CHKDSK runs at startup, try to solve the problem, but the data would be lost or unreadable disc.  I have since thrown the Samsung WD drives, do not have IO error, but the file copy problem persists.  I also disabled chkdsk at startup for all readers.

My drivers and Bios are up-to-date.  Computer is free of viruses and malware.  I have no more trouble with Windows 7.  Curiously, if I compress my folders/files in one RAR file, I have no problems copying (transfer rate remains stable at 30 ~ 50MB).  This leads me to believe that this is not a hardware problem, but a problem with the Explorer of solutions, and that respect more particularly with the number of files transferred rather than size.  (But unpacking these files also lead to poor performance sometimes...)

Is this a known issue that will be corrected?  I really like Win7, but because I work with large number of files and many backups all the time, stability during the file copying is a must.  I have perhaps to go back to XP, or use another OS entirely...

I had the same problem;

My system-

Windows 7 Pro 64
Core i7 940
7200 RPM dual 500 GB SATA
Gigabit ethernet

Gigabit ethernet switch
Gigabit router

Buffalo NAS 1 TB, RAID 0, Gigabit Ethernet

-----

I was getting speeds of transfer of a maximum of 500 / 600 KB/s between the hard drive and network storage drive. I went through a number of * fixed * on the web without success, however, I disabled "TCP AutoTuning" and "RSS" rebooted and voila, I now get speeds of transfer of 9-10 MB / s and from the network drive.

The fix
It should be noted that, in addition to this, I have updated to the latest updates for Windows and off the DRC in the Windows Options under programs/features.

How to disable TCP AutoTuning and receive scalability side

  1. Open a prompt with administrator rights.
  2. Type the following commands, and press enter (the second command on RSS is optional):

    netsh interface tcp set global autotuninglevel = disabled
    netsh interface tcp set global rss = off

  3. Restart the computer.

----------------------------------

Tags: Windows

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