SAS 2.0 is designed for much higher speed data transfer than previous available and backward compatibility with SAS 1.0. The 6Gb/s SAS interface supports both 6Gb/s and 3Gb/s SAS/SATA disk drives for data-intensive applications and 6Gb/s or 3Gb/s SATA drives for low-cost bulk storage of reference data. The ARC-12x5 family only support directly attach to 4/8 SAS/SATA drives without supporting the expand function.
Areca ARC-1215-4i, SAS, Serial ATA III, PCI Express x8, 0, 1, 3, 5, 6, 10, 30, 50, 60, 1E, JBOD, 6 Gbit/s, 1024 MB, DDR3
Areca ARC-1215-4i. Supported storage drive interfaces: SAS, Serial ATA III, Host interface: PCI Express x8. RAID levels: 0, 1, 3, 5, 6, 10, 30, 50, 60, 1E, JBOD, Data transfer rate: 6 Gbit/s, Internal memory: 1024 MB. Built-in processor: RAID-on-Chip, Processor frequency: 800 MHz, Processor family: Dual-Core. Depth: 169.5 mm, Height: 64.4 mm