Supermicro accessories for server chassis 8-port SAS/SATA hard drive backplane forfor Tower/4U Chassis SC747TQ & SC747TG, support up to 8x 3.5" hot-swap SAS/SATA hard drives. Mfg. part Number: Supermicro BPN-SAS-747TQ, bulk. Features: SAS / SATA Hard Drive Backplane with SES2