The SAS / SATA technology offers a performance improvement over traditional SCSI connections.
Serial Attached SCSI (SAS) and Serial ATA (SATA) are point-to-point serial peripheral interfaces in which
controllers are linked directly to disk drives. This technology supports full-duplex signal transmission
up to 6Gb/s. SAS devices can communicate with both SAS and SATA devices. A key difference between SAS and SATA devices is, that SAS devices can have two data ports, of which each resides in a different SAS domain. This enables complete failover redundancy. If one path fails, there is still communication along a separate and independent path.