SAS (Serial Attached SCSI) is an advanced technology for connecting hard drives and other storage devices.
It works in a similar way to the widely used SATA interface, but offers some advantages, in particular faster data transfer. In the first version of SAS, data transfers reached a speed of up to 3 Gb/s. With the next version, SAS 2, the speed was doubled to 6 Gb/s, and with SAS 3 (or SAS 12G) even 12 Gb/s is possible.