Solve : weird hard disk troubleshooting plz help?

1.	Solve : weird hard disk troubleshooting plz help?
Answer» I have a WD-2500KS SATA II devided in 2 partitions....the problem is that the second partition reacts rather weird....when i try to move a file/folder to a different DIRECTORY in the same partition that file/folder BECOMES instantly not accessible!....i cannot undo the movement and in properties it appears to be 0 size as if it had never been moved there but the file/folder does not appear in the first location either!!!.... I cannot understand what the censored is happening,the other partition DOESNT have such problem,and this way i am losing data that becomes not accessible if i try to move them,data that were previously accessible if i execute them in their former location!....i tried scandisk but nothing happened,and defrag isnt working either! Plz any IDEAS.... :-?

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