You defragged a ext3 partition? In practically all cases it is not necessary. We are trained to think it is necessary because of the larage amount of time we have spent with Windows filesystems (FAT32, NTFS).

What is your bootloader? Grub or Lilo or Windows bootloader?

Getting grub back on the MBR - http://www.knoppix.net/forum/viewtopic.php?t=19793
Getting lilo on the MBR and info on defrag - http://www.knoppix.net/forum/viewtop...?p=86429#86429
Getting Windows bootloader back on the MBR - http://www.knoppix.net/forum/viewtopic.php?t=20540