Add Disk Array to R620 with MD1200

I have a R620 server running Redhat Enterprise 6.4 connecting a MD1200 disk array with a H800 card

the disk usage on the MD1200 disk array will be full soon.

Can we add another MD1200 disk array to expand the disk storage ?

We may need further 30TB. It seems the MD1200 could not provide enough disk space. What other module of disk array can we add ?

Thank you

Macus