Wow Virus, your having the EXACT same problems as me:
http://forums.overclockers.co.uk/showthread.php?t=17979886
I taken two tests, but found memory errors (not relating to my RAM in anyway).
Transferring large files to/from my PC, I found myself getting blue screens or the PC rebooting.
Ive just raised a new RMA with rexo and will be posting these tomorrow, I wish I had bought Western digital or something now instead

I emailed the test errors to both samsung and their approved dealer, and neither of them returned a single sentance, offered any support but instead told me how to use the RMA service. So bugger it, im sending both disks off to them, and I shall NOT being paying a penny if they find one of the drives to be fine, that is shoddy customer service.
With that in mind, I have 4 spinpoint F1's (1TB) in my NAS. I had one fail on the raid5 array which was a pain, but after removing that disk for repair, another disk failed which lost me the array. I sent the whole lot off to be recovered and thankfully it all was. Ive not had any problems with my nas in the last 3/4 months (touch wood).
I previously had two sammys in a raid0 in my PC, which the raid array kept falling over. I want to throw them out
Im sorry you have the same problem, but im also glad to find out its not just me
