unreadable sectors, what to do?

[Neal Becker]

I have a raid0 array, and I'm getting this:

 Currently unreadable (pending) sectors detected:
        /dev/sda - 48 Time(s)
        2 unreadable sectors detected
 
 Offline uncorrectable sectors detected:
        /dev/sda - 48 Time(s)
        2 offline uncorrectable sectors detected

What should I do?  Run badblocks?