Serial Attached SCSI (SAS) is a point-to-point serial protocol that is used to move data to and from computer storage devices such as hard drives and tape drives. SAS was designed to replace the older parallel SCSI (pronounced "scuzzy") bus technology that first appeared in the mid-1980s. SAS, like its predecessor, uses the standard SCSI command set. SAS offers backwards-compatibility with second-generation SATA drives. SATA 3 Gbit/s drives may be connected to SAS backplanes, but SAS drives may not be connected to SATA backplanes.
The T10 technical committee of the International Committee for Information Technology Standards (INCITS) develops and maintains the SAS protocol; the SCSI Trade Association (SCSITA) promotes the technology.
Read more about Serial Attached SCSI: Introduction, Identification and Addressing, Comparison With Parallel SCSI, Comparison With SATA, Nearline SAS
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