eleven years ago the SATA Revision 3.0 specification, which made it possible to double the peak speed of one of the most common interfaces for connecting hard drives. And today the revision of the SATA specification version 3.5. The maximum exchange rate remained unchanged and froze at 6 Gb / s. But the developers of the standard promise to improve overall performance and improve integration with other I / O standards.
Basically, innovations in SATA Revision 3.5 come down to three additional features. First, it is a technical feature of Device Transmit Emphasis for Gen 3 PHY. It allows you to focus on the transmitting device, making SATA equal to other I/O solutions when measuring their performance. This function should help at the stage of testing and integrating the interfaces of new devices.
Secondly, in the SATA specifications, a function has appeared to determine the ordering of NCQ commands or Defined Ordered NCQ Commands. It allows the host to specify the relationship between commands in the queue and sets the order in which these commands are processed.
The third new enhancement in SATA Revision 3.5 is Command Duration Limit Features. It is designed to reduce latency by allowing the host to define quality of service categories through more granular control of command properties. This feature also helps align SATA with the "Fast Fail" requirements set by the Open Compute Project (OCP) and specified in the INCITS T13 Technical Committee standard. Accordingly, the new SATA revision has incorporated all the latest updates to the T13 standard.
Finally, the SATA Revision 3.5 specifications included corrections and clarifications to the SATA 3.4 specifications.
It is expected that the optimization of command processing and bug fixes carried out in the new version of SATA Revision 3.5 will help reduce the number of cases of βcongestionβ during intensive data transfer over the SATA interface, which can only be welcomed.
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Source: 3dnews.ru