I ran HDTunePRO today and saw that my disk has a Current Pending Sector warning:
I read in wikipedia that the lower this attribute is the better and that it is a "Potential indicator of imminent electromechanical failure".
Should I be alarmed?
Its common to have couple of sectors in current pending sector list - as long as the count doesn't increase rapidly in the new few days you should be fine
It sounds like the hard drive thinks two sectors are marginal but your reallocated sector count is zero so it looks like the two make get reallocated.
I like how wikipedia explains the two SMART parameters.
Also, keep in mind all drives will fail, so only backup the data you want to keep.