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. The offering here covers: Lenovo ThinkServer RAID 520i PCIe Adapter (4XC0G88840) Lenovo ThinkServer RAID 520i RAID 5 Upgrade (4XC0G88841) Lenovo ThinkServer TS450 12 GB RAID Expander Card (4XC0G88843) Lenovo ThinkServer 9380-8e PCIe 12 GB 8-port External SAS RAID adapter by LSI-Avago (4XC0G88845)Support 6 GB SATA / SAS drives Support up to 8 disks