Unzuverläsige disk

This Seagate Barracuda 7200 hard drives do not seem too much to be useful. I bought 2 years ago a NAS with 2 such plates - were just there and are so for 11-14 months in each case died a hero ... beginning with reporting more and more bad blocks to total failure. Actually, I expect even that such a panel for more than 1 year holds in 37Grad measured temperature.
The 7200.11 were each down extremely fast. The 7200.12 are slightly better,
I have these things replaced by boards of the same type (7200.11 it with 750GB by 7200.12er same size), because newer models have larger sectors and not all types can be combined as desired with Linux NAS '.
From the speed and volume that things are really great, but as I said the life is bad. Therefore, only 2 stars.
Whether the competition is better, I can not beurteien There are just consumer panels and no professional boards.