One correction to Sam's post. As per the PERC H810 manual (as you have a 12th generation PowerEdge, this is the PERC you'd want to get for an MD1200/1220) on page 18, you cannot reconfigure a spanned raid set (raid 10, 50 and 60). downloads.dell.com/.../poweredge-rc-h310_User%27s%20Guide_en-us.pdf So you won't be able to expand a raid 10. Only raid 0 (not to be used for production data), 5 and 6 can be reconfigured to grow them. The PERC H800 had the same limitations.
I need to add more storage to a PE R420. I use this server for backing up other servers using Arcserve. The additional storage would primarily be used for backup storage in a Disk-to-Disk-to-Tape process. I am considering using an MD1200/PERC H800 combination with (6) 4 TB SAS near-line drives setup in a RAID 10. Down the road, when I need to add storage capacity by adding additional drives to the MD1200, what are my options? Let's say I add (4) more 4 TB drives. Would I be able to add this capacity to the existing RAID 10 and add to existing volumes or create new volumes or would I have to create a 2nd RAID 10 with a separate volume(s)? Thanks.
Adding MD1200 to PE R420