Some time ago there was a conference in the US trade association SCSI, which is being developed under the auspices of interfaces for enhanced storage reliability and performance. The next development of SAS standard 24 Gb / s. It is reported that commercial supply drives with the new interface will start in 2018 or 2019. If we believe the presented slide demonstration the first products from the SAS interface 24 Gb / s is expected in 2017.
The updated interface will get not only high data rate, reaching in the theory of up to 3 GB / s, but also a number of new features. For example, the expected emergence of a completely new mechanism for encoding using the 128/150-bit keys, 20-bit error correction mechanism without re-transmission of data and other innovations. In particular, it is necessary to update the interface connector, but backward compatibility is retained.
From a purely practical point of view modern interfaces such as SATA Express and protocol NVMe could replace the SAS bus 24 Gbit / s in that niche where they are needed - in server systems and storage systems for mission-critical tasks. The SAS 24 Gb / s requires the extensive use of storage in the form of hard drives, which are written off early today, and it would be premature even after five or more years.
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