[CentOS] RSync Issues

Hi All,

Rsyncing to a USB drive. I am in single user mode.

I am doing:

rsync -avx --stats --progress --ignore-existing --exclude 'home/backup/ 
data' / /mnt/sdb2/

But I dont see if ignoring existing. A previous rsync stalled and now  
it seems to be copying them again rather than ignoring them.

Does anyone have thoughts?

-ML