help needed with /etc/fstab

[Wolfgang]

Hi,

I've added a new hard drive for my data but I dont manage to adapt the 
fstab file to get it loaded automatically.

I can mount it with: sudo mount -t ext3 /dev/sda /sontiges/

I read the UUID with sudo vol_id -u /dev/sda and inserted this line to 
fstab:

UUID=6a5cabf0-87d2-4000-93e3-7c25e372992e	/sonstiges	 ext3	 defaults	 0	 2

But after a reboot it is not mounted. Can anybody give me a hint what I 
do wrong?

Thanks
Wolfgang