mounting ext4 partition

[Jim]

I have some hard drives in my computer that I back up using Grsync.  I 
have one of those USB hard drive docking stations I put another drive in 
when I'm ready to do a backup.  The backup works fine, but when I go to 
unmount the drive containing the backup, the system prompts me for my 
password.  Is there some change I can make in fstab to stop the system 
nagging me for my password?  Here is the entry in fstab for one of the 
backup drives.

UUID=797f7b69-9b84-4b22-8e64-73f9104eb79e /media/delboy/boffo ext4 
noauto,user        0    0

thanks