Question : Problem: Corrupted files

I have hard disk SAMSUNG 250GB.
I connected it through ATA (motherboard is GIGABYTE GA-8IP775); BIOS recognized it properly without any problems, but when I tried to partition it under windows 2000 - it was recognized as 130GB. So I connected it through USB interface and managed to create 250 gigs partition. I put ~100GB data onto it (AVI/MPG movies). Afterwards repartitioned it with partition magic into two equal partitions (about 116 gigs each). So far so good.
Then I connected the disk through ATA again, put some data onto empty partition, restarted windows. While booting black screen appeared - I guess it was fixing something. Some movies put while disk was connected through USB interface are still working properly, but others are not - when I run them screen is black and voice strange mix of sounds. Those on partition filled through ATA are working without any troubles. I ran chkdsk, some other programs (like avifix, easy recovery, partition table doctor) - but no luck. I'd really appreciate any help.

Thanks,
Grzegorz

Answer : Problem: Corrupted files

...  just to confirm that you're not still just having 48-bit LBA issues have you tried putting the drive back in the USB case (which clearly DOES support 48-bit logical block addressing) ??

If that doesn't work (and I suspect it won't), then as I said above, there  "... May not be anything you can do about it ..." => and with the further testing you have done it's clear you can NOT do anything.   So just learn the lesson about NOT writing to a disk that's having problems until you know what the issue is ... and be sure you're mindful of the need for 48-bit LBA support with large disks.   In this case, Chkdsk almost certainly did the damage while it was "fixing" what it thought were problems.