Originally Posted by TobiSGD
Well if the only thing that is different is the OS and the localization of the file, and you already tried different Linux versions to rule out the OS (and you stated that you have problems on Windows also, even if they are from a different kind), then it has to be the localization of the file (reminds me of a famous sentence from Sherlock Holmes). May be your disk has bad sectors on the ext4 partition (and may be in unused aprts of other partitions), but not in the used parts of your NTFS partition.
A disk check will make this clear. If it is not the disk I would assume that it is the motherboard or the CPU, there may be different symptoms of the same issue, because they are different OSes and act differently.
Well, I probably did not described it clearly.
I did not run check-sum test from OS windows.
I am checking ntfs files under linux OSes (installed NTFS-3G 2011.4.12) (6 different ubuntu instances on 4 different hard disks).
This weird behavior is not only on one hard drive but on FOUR DIFFERENT hard disks (and 5 different ubuntu linux instances).
Two of hard drives are connected through SATA III/II.
One hard disk is connected through USB 3.0 port but disk supports only usb 2.0.
One ext4 partition is on USB flash drive (motherboard USB 3.0 and flash-drive USB 2.0).
There is very low probability that all four drives have the same problem - especially if they are using different hardware connectivity (usb or sata) and have different hardware equipment (3 are "classic" magnetic hard disks (not SSD) , 1 is flash-memory usb stick).
There is as well low probability that all of four ext4 partitions located on 4 different hard disks are wrong the same way.
And all ntfs (8 partitions/6 hard disks) are correct. (Connected by sata or usb - internal or external HDDs.)
Thats the reason why I do not understand. Because if it would have been problem only on one disk - thats I would understand - it could be hardware problem.
But all of 4 disks have the same ext4 issue but not ntfs. So, I cannot assume that only ext4 partitions are wrong because of hardware failure and ntfs are correct. Or assume that I have ext4 partitions on wrong places and ntfs are on right places :-) That is really sounds to me as extremely low probability :-)
And why is this happening only on files bigger than 3.9 Gigabytes ?
I really made all those tests with so many combinations.
ntfs partitions have been tested with "chkdsk /r" parameter many times within last months. - no errors.
ext4 partitions have been tested without -c parameter ,not mounted, many times like "sudo fsck -t ext4 -v -y -f /dev/????" - no errors.