OK, got my first bad block/unreadable sector error on a hard disk drive.  The Bad block HOWTO for smartmontools" at http://smartmontools.sourceforge.net/badblockhowto.html has very detailed instructions for what to do next -- under Linux.  I've searched in vain for an reference to doing the same thing under Windows (Server 2003), though it is on 80?% of the machines today.
Any pointers to help would be appreciated.  
(Great tool)
-- Roy Zider