The DataPort 4 Bay Mini SAS/SATA Storage Subsystem puts a very large capacity, high-performance, Business Class storage in a small desktop enclosure. Version available to support four hot swap up to four 3.5" hard drives using DataPort 25 removable drive enclosures.SAS and SATA both support max transfer rates up to 3Gb/s. SAS goes beyond SATA by adding full duplex data transfers, so when commands are queued in SAS, both read transfers and write transfers can occur concurrently at 3.0Gb/sec., effectively providing a total bandwidth of 6.0 Gb/sec. SAS also features dual port point-to-point architecture through multi-lane, or "wide", connections, so a 4x connector provides up to 24Gbps aggregate, bi-directional throughput.