Serial Attached SCSI or SAS, is an interface for serial data transfer, the successor to SCSI (Small Computer System Interface) parallel, but still uses SCSI commands for interacting with SAS devices. It increases speed and allows connection and disconnection quickly. The first version appeared in late 2003: SAS 300, getting a bandwidth of 3 Gbit/s, which increased the speed slightlyits predecessor, the Ultra SCSI 320 MB/s (2.560 Gbit/s). The next evolution, SAS 600, achieves a speed of up to 6 Gbit/s, while expected to reach a speed of about 12 Gbit/s circa 2010.

The SFF connectors are distinguished by their smaller size, they are ideal for saving space. The SFF connectors also increase port density cards, switches etc ..

Gbps (Gb/s, Gbit/s) is the speed with which information is transmitted. It is normally used to measure the speed information in the ADSL/fiber addresses transmitted.

• 1 Gb/s is equivalent to 1,000,000,000 b/s.
• 1 Gb/s is equivalent to 1000000 kb/s.
• 1Gb/s equals 1000 Mb/s.