HP Smart Array P222/512 FBWC 6Gb SAS Controller 631667-B21 is 6 Gb/s, PCIe 3.0, Serial Attached SCSI (SAS) RAID controller that provides entry-level, second generation storage performance, scalability, and data protection for HPE ProLiant servers. It features four internal and four external SAS ports (1 internal (SFF-8087)/1 external (Mini-SAS SFF-8088) x8 wide port connectors) and delivers increased server uptime by providing advanced storage functionality, including online RAID level migration with flash back write cache, global online spare, and pre-failure warning.P222 Adapter features x8 6Gb/s SAS physical links (compatible with 3G SATA). In addition, 512 MB DDR3-800 MHz 40bit Flash-Backed Write Cache provides up to 4.2 GB/s maximum bandwidth. P222 Supports the following RAID: RAID 6, 60 (Advanced Data Guarding), RAID 5, 50 (Distributed Data Guarding), RAID 1, 10 (Drive Mirroring), RAID 1 ADM, 10 ADM (Advanced Data Mirroring), RAID 0 (Striping) and Logical Drives Supported Up to 64 logical volumes up to 54 physical drives