Rus V. Brushkoff wrote: >> So the Hitachi ones are lighter than the WD ones and behave like mobile >> hdds in that respect. > > Yes, these Hitachi is lighter and more sensitive to vibrations - even > hanging on wires is sufficient for twice perfomance drop - the whole > vibro silence is requred for it to reach the max speed. I think this > is mostly the hardware design flaw of this particular model - will > return all of them. Well, you said that the 2.5" WD drives showed the same symptoms, so I don't see how you conclude the problem is Hitachi-specific. It seems more likely to be an interaction between some (or all) 2.5" drives and the particular case/fan combination. How are the 2.5" drives mounted in the cases? Perhaps it would be fixable by using low-vibration fans or fan mounting kits. Perhaps mounting the drives on a lump of solid metal to bring them up to the same mass as a 3.5" drive would fix it. Perhaps resilient mounting of the drives would fix it. Perhaps a stiffer/heavier case would fix it. Now that you know the problem is hardware-related, the same symptoms should show up using Windows (or any other OS). So maybe Hitachi (and WD and the case and fan manufacturers) might now be interested in finding a better cure, or at least warning potential customers. -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
