My understanding is that
Reallocated_Sector_Ct gives the absolute number of remapped sectors while
Reallocated_Event_Count gives the number of tries to initiate such a remapping. How could it then by that a disk has a
Reallocated_Sector_Ct of 0 but thousands of
Reallocated_Event_Count such as this Seagate ST9500420AS:
5 Reallocated_Sector_Ct 0x0033 100 100 036 Pre-fail Always - 0 196 Reallocated_Event_Count 0x000f 087 087 030 Pre-fail Always - 11481 (35561 0)
I seriously doubt that there were 11481 unsuccessful attempts to map sectors on this drive. If I would have to guess then I would say that the interpretation of these values on the interwebs does not reflect what the vendors' or at least Seagate's engineers implemented :) Is there a better explanation?