The answer is yes and no. YES if you have a RAID 0,1,5, or 6. OCE/RLM can expand your RAID array by adding disks to it. (On the H7x0, you can also expand by replacing disks with larger ones.) NO if you have a nested RAID level (10, 50, and 60). NO if you have multiple arrays configured across the same set of disks (slicing). 
Hi- We'd like to expand our current RAID5 VD for our data partition. Can we dynamically add more disk "without" wiping the array and re-initializing? Meaning, would our data be intact on our Windows NTFS partition and "not" have to backup & reformat FS? We've talked to Dell support in the past and had to wipe a RAID10 array and reformat, etc. for a T620 w/ an H710 adapter. For ourT610 - PERC 700 adapter - there is a tech spec from Dell - it mentions "online disk expansion" - what exactly does this mean? --> www.dell.com/.../perc-technical-guidebook.pdf Thanks for any clues or help.  -SP     
T610 - PERC H700 Internal Integrated