ZCS - 6.0.6 OSS

I have 2 disk in a data center's server of 300 GB each . I wanted to use at-least 500 GB as zimbra store . can I create a additional store outside /opt/zimbra on disk2 and use it . if yes how can I do it ? What are the options available ?

I donot want to go Linux way , like LVM etc .

Thanks

Regards

BB