ThinkServer always meets the demand for performance enhancement and feature enablement by way of continuous improvement on products and options. Upgrading your systems with the new options will bring you great value with flexibility, scalability and field-proven reliability.Dedicated IOC (I/O controller) supporting 6 Gb SATA and SAS RAID 0/1/10 Can be upgraded to RAID5 with Lenovo ThinkServer RAID 510i RAID 5 Upgrade option Support up to 8 disks.