Supermicro accessories for server chassis 12-port SAS/SATA hard drive backplane with single SAS Expander for 4U server chassis SC847E1, support up to 12x 3.5" hot-swap SAS/SATA hard drives. Mfg. part Number: Supermicro BPN-SAS-826-7EL1, bulk package. Features: Supermicro BPN-SAS-826-7EL1 2U SAS Expander Backplane features: • Scalability through cascading • 3Gb support • Inband SES-2 Enclosure Management • SAS/SATA support • Single Input/Output via SFF-8087 connectors