DISK0S3 how delete it??

Hi everyone

i have an partition in my desktop that´s called "DISK0S3"?
i´ve tried to go to disk utility and can´t erase from there.

there´s any way for me to delete it from terminal? i go to the terminal and i type:diskutil list, and this is what i got:

#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *320.1 GB disk0
1: EFI 209.7 MB disk0s1
2: Apple_HFS Machintosh HD 311.3 GB disk0s2
3: Apple_HFS DISK0S3 8.3 GB disk0s3



(i cant proceed in boot camp as well)

thank you everyone, and sorry about my english.

In order to erase or remove the 8.3 GB partition, you have to boot the machine with your install DVD and use Disk Utility. You can not erase or remove a partition or otherwise do anything else to the disk while it's mounted.

Regards.