what is usap

USAP is a new transmission protocol developed by USB-IF for connecting serial devices through the USB interface. It provides transmission speeds of up to 20% for mass storage devices and reduces CPU utilization, data latency and Waiting time, USAP protocol provides high-performance data transmission between hosts and devices.

With the latest USB 3.0 driver and a USB 3.0 device that supports UASP, you can experience and enjoy UASP immediately Performance improvements brought about by technology. Currently, many manufacturers that work closely with GIGABYTE, including Buffalo, CyberSLIM, OCZ, Sharkoon, and SuperTalent, have launched devices that support UASP. (Recommended learning: web front-end video tutorial)

The current USB3.0 motherboards have begun to implement popular USAP

USB 3.0 has a relatively large amount of data When there are multiple and fragmented transmissions, the performance will be poor. The main reason is due to the conditions caused by the transmission technology.

USB adopts half-duplex transmission mode and BOT (Bluk Only Transfer) transmission protocol. The half-duplex transmission mode is like talking on a walkie-talkie. One party can finish talking and the other party can continue the conversation, which means that the data The transmission direction only has one-way transmission function.

The BOT transmission protocol is a single-thread transmission architecture. This architecture is like only one car on the road. No matter how wide the road is, it must wait for the next car to pass by. Cars can continue to pass.

USB acceleration method

When USB is upgraded to USB 3.0, the original half-duplex transmission mode is changed to full-duplex mode, and the speed is improved ten times bandwidth, but its architecture is still under BOT.

Although this method is still under the BOT structure, it replaces the car that was originally driving on the road with a larger bus and increases the amount of data transmitted at one time, which can reduce the number of round trips. times to achieve the purpose of acceleration.

Although the BOT acceleration mode can effectively increase the transmission speed, it still does not fundamentally solve the problem of inability to multi-process. Therefore, USB-IF (USB Implementers Forum) was jointly established by a company to develop USB specifications. In order to achieve better transmission efficiency, the non-profit organization developed the UASP (USB Attached SCSI Protocol) transmission architecture, which allows USB3.0 to transmit data in the same manner as the SCSI transmission protocol, without having to wait for the previous data transmission to complete. Carry out the action of transmitting data and improve the CPU usage, data delay and waiting time.

To achieve the UASP acceleration function, please first confirm whether your computer also supports the UASP function.

Currently, the systems that support UASP are WIN 8 and Mac OS 8 & 9. In addition to the above systems, you can also ask the computer company you purchased from if they provide relevant drivers.

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