For beginners to happily confirmed, if the order was made from Amazon, fortunately, everything is taken care of.
Detail:
As for me, I ordered 2 HD204UI disks (Samsung Spinpoint F4 2TB EG), to be installed on a NAS protected by UPS 24/24 (which already contains other disk ... Samsung Spinpoint F3 including 1 5 TB).
After 650 hours or 27 days, 1 disk HS 2 is ...
NB: Its predecessor (on a pair of F3 1.5TB) held about 19,000 hours or just over 2 years and 1 month ... just after the end of warranty ...