A multi-hard disk management backplane with u.2 interface and method

Abstract

The invention provides a U.2 interface multi-hard disk management backplane and method, the backplane includes: a PSOC microcontroller, the first control terminal of which is connected to the fourth control terminal of the uplink interconnection interface; the GPIO expander, the sixth The control terminal is connected to the second control terminal of the PSOC microcontroller; the seventh control terminal of the GPIO expander is connected to the eighth control terminal of the downlink interconnection interface; the first input terminal of the CLK BUFFER chip is connected to the fifth control terminal of the uplink interconnection interface, The second input end is connected to the third control end of the PSOC microcontroller, and the output end is connected to the ninth control end of the downlink interconnection interface; the downlink interconnection interface and the uplink interconnection interface are connected through a data channel; the downlink interconnection interface is a U.2 interface , which is used to connect the storage medium of the U.2 interface; the method is used to manage the U.2 hard interface hard disk, so that the NVME hard disk can be more safely hot-swapped.

Description

technical field [0001] The invention relates to the technical field of backplane design, in particular to a multi-hard disk management backplane with a U.2 interface and a method thereof. Background technique [0002] At present, hard drives using the U.2 interface standard have been widely circulated. The U.2 interface is also known as 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 be connected to different types of hard disks of SAS, SATA and NVME. Among them, the interface hard disks of SAS and SATA include both mechanical hard disks (HDD) and solid-state disks (SSD). NVME is a solid-state hard disk based on the NVME protocol. [0003] For different types of SAS, SATA, and NVME hard drives, their backplane management solutions are often different. For some existing backplanes, SAS and SATA hard drives use the SGPIO management solution, and N...

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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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