so I've got this Western Digital 320gb Scorpio Blue drive. Looking at its smart attributes I have a Reallocated Sector count of 1635 which I am aware of being way higher than it should on a healthy drive.

My question is about the relationship of the Reallocated Sector Count and Reallocation Event Attributes. I figured the first shows the sectors Reallocated and the second shows the number of times the drive has attempted to make a reallocation but the sector count is in the thousands and the event count is 45. Its a bit strange but I may just not understand the meaning of the attributes.

I don't understand the apparent anomaly, either, but it could be that the Event count is a rolling average rather than a cumulative total.

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A backup a day keeps DR away.

One deffect may consist of hundreds sectors...
Bad track for example.
Event count shows the number of such deffects .