U.2 interface multi-hard-disk management backboard and method

Abstract

The invention provides a U.2 interface multi-hard disk management backboard and a method, and the backboard comprises a PSOC microcontroller of which the first control end is connected with the fourthcontrol end of an uplink interconnection interface; a GPIO expander of which the sixth control end is connected with the second control end of the PSOC microcontroller; a seventh control end of the GPIO expander is connected with an eighth control end of the downlink interconnection interface; a CLK BUFFER chip of which the first input end is connected with the fifth control end of the uplink interconnection interface, the second input end of the CLK BUFFER chip is connected with the third control end of the PSOC microcontroller, and the output end of the CLK BUFFER chip is connected with theninth control end of the downlink interconnection interface; a downlink interconnection interface which is connected with the uplink interconnection interface through a data channel; the downlink interconnection interface is a U.2 interface and is used for being connected with a storage medium of the U.2 interface; the U.2 hard interface hard disk is managed through the method, and safer hot plugof the NVME hard disk is achieved.

Description

technical field [0001] The invention relates to the technical field of backplane design, in particular to a U.2 interface multi-hard disk management backplane and a method thereof. Background technique [0002] At present, hard disks using the U.2 interface standard have been widely circulated. The U.2 interface is also called SFF-8639. The U.2 interface combines the characteristics of SATA and SAS interfaces. U.2 supports the NVMe protocol and is compatible with SAS, The SATA protocol specification can connect different types of hard disks such as SAS, SATA and NVME. Among them, the interface hard disks of SAS and SATA include both mechanical hard disks (HDD) and solid-state hard disks (SSD), and NVME is a solid-state hard disk based on the NVME protocol. [0003] For different types of SAS, SATA, and NVME hard disks, their backplane management solutions are often different. For some existing backplanes, SAS and SATA hard disks use the SGPIO management scheme, and NVME hard...

AI Technical Summary

Problems solved by technology

[0004] In addition, on the existing U.2 interface backplane, the differential clock signal is directly transmitted from the pins of the upstream interconnection interface to the pins of the downstream interconnection interface, that is, the pins of the U.2 interface. The length of the pin is shorter than the length of the pin that transmits the differential clock signal to the NVME hard disk, which will cause: when the NVME hard disk is plugged in with power, the hard disk connection has not been detected, and the differential clock signal pin has already transmitted signals to the NVME hard disk; When the hard disk is powered on and pulled out, it has been detected that the hard disk is pulled out, but the differential clock signal pin is still transmitting signals to the NVME hard disk; in this way, when the NVME hard disk is hot-swapped, the differential clock signal of the hot-swappable interface will generate noise. If the differential clock signal is not effectively controlled, the noise generated by it will have a negative impact on the NVME hard disk, and even cause irreversible damage to the hard disk

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