Drobo B810i - 8 Bay SAN Storage Array for Business- iSCSI x 2 Ports (DR-B810I-3A21) 8 drive bays (3.5 SATA & 2.5 SSD). Highly scalable iSCSI SAN storage array with 64TB volume filesystem support 2x Gigabit Ethernet iSCSI ports plus a separate Gigabit Ethernet management port (cables provided) BeyondRAID for advanced data protection - Hot Data Cache & Data-Aware Tiering, Thin provisioning and reclamation, Instant capacity expansion, Automatic protection (RAID) levels, Single or dual disk redundancy, Virtual hot spare Drives of any manufacturer, capacity, spindle speed, and/or cache can be used. No carriers or tools required. Metal chassis Expandable by adding drives or hot-swapping drives with larger ones.*Units with hard drives include Seagate IronWolf Pro HDDs