Creating Backup script to run nightly to mirror folders

Try SuperDuper:;  http://www.shirt-pocket.com/SuperDuper/SuperDuperDescription.html

or

CarbonCopyCloner:  http://bombich.com/

So i got the script to work. but it when the schedule task runs, it prompts for a password. i then have to manually type in the password to start the sync. here is my script.

time sudo rsync -a -e ssh "/Volumes/BurlyHD/*HD_Dustbin" /Volumes/MirrorBackup/DailyBackup/*Huge_HD_Dustbin --progress --updates

Here is a discussion of this problem:  http://forums.macosxhints.com/showthread.php?t=42593

Also: http://developer.apple.com/documentation/Darwin/Reference/ManPages/man8/sudo.8.html