Data backup- (udev problem)

hi, in order to backing up of the data , I wrote a script that uses the rsync command. This script have to be launched manually, and the data are saved on a USB Hard Disk, which (obviously) must be mounted. The mounting of the partitions for the back up on the USB HD is made permantly at boot of the computer (the name of the backup-partitions is wrote in the file / etc / fstab) : UUID=376214F24CC07CE0 /media/BKx_data-personal ntfs defaults 0 0 UUID=479F99A324FF4D1D /media/BKx_programming ntfs defaults 0 0 UUID=EA8266EA8266BB29 /media/BKx_data-common ntfs defaults 0 0 This script works fine. However, this solution for backing up the data is problematic, because *I always receive messages with the request of access to the partitions ** of the “backup-partitions”** by "nautilus"* - every time that I use the "find" command. I can consider that this problem is connected with the *permanent * *mounting* of the partitions on the HD-USB (on the file /etc/fstab). To avoid these problems I actually removed the permanent mounting of the partitions by registering them on the file fstab and now I'm looking for an alternative solution for the back up the data. I think this solution can go in the following directions: - mounting the partitions (commanded by the script) before executing the rsync command and unmounting them immediately afterwards. - alternatively, giving appropriate orders to the “udev feature” about the backup partitions (I think this is possible to do, but I do not know how to do it). I would like to have some suggestions and advice about it. Regards Angelo