Rocstor 5-Port Combo BigRoc 1U Rack Mount System (R5C1XX-4B) Supports current SATA II RAID compliant hard drives, fully backward compatible with SATA 1.0 and SATA 1.0a compliant hard drives. Connects via USB 3.0, USB 2.0, eSATA, IEEE 1394a, and IEEE 1394b ports Provides JBOD, RAID 0 (Striping), RAID 1 (Mirroring), Span, Clone, RAID 5, RAID 10 (1+0) Monitors system status via LED indicators Features a tray-less function, by inserting in the hard 3.5 hard drove user-friendly design enables effortless hard drive hot-swapping Dissipates heat efficiently with aluminum housing - Maximizes airflow with fans and mechanical designs System Requirements: Mac OS 10.5 or higher, PowerPC, Mac OS X 10.4 Intel Core Duo Microsoft, Windows 2000, XP, Vista, Windows 7, 8 Bigroc series tray-less device utilizes the simplicity of hard drive installation and removal. The Hard drive can be slide into the unit by simply pushing the drives gently into its slot; and can be removed by simply pulling a lever above the hard drive. This enables flexibility in removal and insertion of the hard drives with ease