Today's hard drives use SATA or SAS interfaces, which are the serial versions of their PATA and SCSI predecessors. SATA drives are found in most personal computers unless they use solid state ...

In contrast, the consumer-oriented SATA interface has only one channel. The Serial SCSI Protocol (SSP) is used for SAS drives, and the Serial ATA Tunneling Protocol (STP) is employed for SATA drives.

Of course, these days, you are more likely to find some version of SATA and — lately ... In addition to a standard hardware interface, most SCSI devices didn’t need special device drivers.