Are there different kinds of EMM controllers for MD1200, or only the firmware needs to be updated?4kn disks DO work in an MD1200 as long as the controller the MD1200 is plugged into supports 4kn disks. I had 4 Seagate ST10000NM0206 working in one MD 1200 for a few months before I moved them to a different server. I also have 3 new (new to me) MD1200 each with 11 ST8000NM0065 in them. They are working no problem. Using Dell Perc h830 controllers in Poweredge R730 and T630 servers
Edit: I realize that by "the controller" you mean the HBA on the server. Does an LSI 9207-8e IT mode HBA with MD1200 support 4Kn disks?