Bad drive copy ?

[JD]

  On 10/13/2010 07:52 AM, Linuxguy123 wrote:
> I seem to be doing a lot of things with hard drives these days !
>
>
>
> I purchased an external 2 TB SATA hard drive.  I connected it to my
> laptop via a USB interface.  I partitioned it to 1 large partition and
> formatted it to ext4.
>
> I then copied about 200 GB of data to it using Dolphin.  I closed
> Dolphin while doing the copy but the process kept running as a kio.  No
> errors were reported.
>
> Tonight when I accessed some of the data, I found errors.   The file
> sizes read correctly but the data in the files is corrupted.
>
> I ran fsck on the drive.
>
> # umount /dev/sdc1
> # fsck /dev/sdc1
> fsck from util-linux-ng 2.17.2
> e2fsck 1.41.10 (10-Feb-2009)
> /dev/sdc1: clean, 128156/122101760 files, 75280327/488378000 blocks
>
> Luckily I still have all the original data, or at least 98% of it.  I
> checked the source files and they all read fine.
>
> Why do I have errors in the files I copied ?  Why isn't anything
> reporting an error ?
>
> $ uname -a
> Linux localhost.localdomain 2.6.34.7-56.fc13.i686.PAE #1 SMP Wed Sep 15
> 03:27:15 UTC 2010 i686 i686 i386 GNU/Linux
>
> Is is worth repeating the copy using cp to see if I get the same
> results ?
>
> Thanks
>
>
>
>
I suspect the cause of your problem might be the USB interface.
Can you take the drive out of the enclosure and connect it
directly to sata port and retry?