Rsync

• for some reason first directory (SOURCE) should be written with a trailing slash and second (TARGET) without (?)
• use -n for 'dry run', especially if usign --del (to check what is to be _deleted_ on destination (TARGET))
• do delete .Trash Recycled and similar stuff before copying, or exclude it
• delete or exclude large files worthy of deleting (boring divx movies) beforehand, as large files slow the whole affair
• to keep backup on TARGET disk and have deleted files delete also on backup disk

rsync -avr --del SOURCE/ TARGET

-a archive mode
-v verbose
-r recursive

links

• http://lists.samba.org/archive/rsync/ mailing list / forum
• google "man rsync"