The SC4020 comes as a 2U dual-controller configuration which has 24 x 2.5" disk bays for storage. The SC4020 provides both iSCSI and fiber channel front end connectivity and SAS ports for expandability.
SC4020 supports nondisruptive expansion to 192 total drives (over 1PB raw capacity) per array, with even larger capacities available in federated multiarray configurations.