HPE Smart Array P822/2GB FBWC 6Gb 2-ports-Int/4-ports Ext SAS Controller (615418-B21) is 6 Gb/s, PCIe 3.0, Serial Attached SCSI (SAS) RAID controller that provides enterprise class, second generation storage performance, maximum external scalability, and data protection for select HP ProLiant Gen8 servers. P822 Controller features two internal and four external SAS ports. Advanced storage functionality, including online RAID level migration with flash backed write cache (FBWC), global online spare, and pre-failure warning will result in peak server performance.

HPE SA P822 Controller features 24 SAS/SATA physical links distributed across six Mini SAS connectors. Two Mini SAS 4i connectors (8 physical links): for attachment to internal drive backplanes and Four Mini SAS 4x connectors (16 physical links): for attachment to JBODs and external tape drives. This also allows Mix-and-match SAS and SATA drives as needed. 

HPE SA P822 supports RAID 0, 1, 1+0, 5, 6, 50, 60, and 1 ADM and has 2GB B flash-backed write cache. This controller can support up to 227 drives depending on how it is configured.