Supermicro accessories for server chassis 12-port SAS/SATA hard drive backplane for 2U chassis SC826A & 4U chassis SC847A, support up to 12x 3.5" hot-swap SAS/SATA hard drives. Mfg. part Number: Supermicro BPN-SAS-826A, bulk. Features: Supermicro BPN-SAS-826A 2U Direct Attached Backplane features: • 3Gb support • SES-2 Enclosure Management Support • SAS/SATA support • Three SFF-8087 connectors