Storage expansion on existing RAID 6 with a PERC H730 controller without data loss??

Hello, 

Could anyone confirm please if I can add physical drives to my existing RAID 6 storage array, expanding the capacity from 24TB raw to 32TB raw, without wiping out the existing data?

The PERC H730 is in a R730 XD XL. 

I heard from other IT sources that it is possible, using Dell's OpenManage sw but would like to get this confirmed here.

Any help is appreciated!