Industry Expert Blogs

SAS (Serial Attached SCSI) continues to be the interface of choice for mission-critical storage sub-systems. SAS 24G is more than just a 2x speed-bump over previous generation of SAS 12GB, rather it’s a major overhaul of the technology.

In the previous blog – Decoding SAS 24G: New Encoding and Features, we looked at the recently introduced 128b/150b Encoding, SAS Protocol Layer(SPL) packets and Forward Error Correction (FEC) added to support transmission at 22.5Gbps. The SPL packet is a 150-bit block containing a 2-bit header, 128 bit SPL packet payload and 20-bit FEC. The FEC field of the SPL packet aids in error detection and recovery. Continuing with the SAS blog series, we shall look at Binary primitives, Extended Binary primitives and primitive parameters in this post.

Click here to read more ...