I have a hard drive that I've been trying to reformat. I tried reformatting it in the windows XP and 7 installers, and in an Ubuntu live cd with gparted. I tried using dd to 'zero' the drive as well with no success. Finally I ran across KillDisk after a search. I tried to zero the disk again with KillDisk and after 8 hours of zeroing I get the following errors in the log:

----------------------------------------Erase Session  Begin---------------------------------------
2010-03-23 19:35:54 Active@ KILLDISK for Windows Build 5.1.39 started
      Target: WDC WD2500KS-00MJB0 232.9 GB
      Located on: WDC WD2500KS-00MJB0 (Serial number: WD-WCANK9604799)
      Erase method: One Pass Zeros (1 pass)  Passes: 1
Bad (unwritable) sectors detected from 1701 to 488397167 on Hard Disk 1.
Error (the handle is invalid) refreshing device Hard Disk 1.
Error (the handle is invalid) reading sector 0 on 81h.
2010-03-24 02:28:25 Total number of erased device(s): 0, partition(s): 0
-----------------------------------------Erase Session End----------------------------------------

Is the drive dead?