HD 'Analysis'

[L. V. Lammert]

Been trying to build a replacement HD for a system, .. and it seems 
impossible to verify whether a disk is bad or not (having wasted some hours 
rsync'ing data only to have the HD lock up the system when doing the final 
rsync).

What is the best way to do a surface analysis on a disk? badsect seems like 
a holdover from MB-sized disks, and it doesn't do any analysis.

        TIA,

        Lee