Data transfer method for dual controllers

Abstract

The invention provides a data transmission method of double controllers. The data transmission method comprises the steps of monitoring electric signals at insertion state pins to obtain insertion states of a first controller and a second controller; if insertion is monitored, monitoring electric signals at a second pin to obtain heartbeat signals of the first controller and the second controller, wherein the heartbeat signals are used for knowing whether the opposite side runs normally or crashes; if monitoring that the heartbeat signals are normal, monitoring electric signals at a position monitoring pin to obtain position states of the first controller and the second controller; and determining that one of the first controller and the second controller is a transmitting side and the other one is a receiving side based on the monitoring result of the position state, waiting for receiving a first package by the receiving side when the transmitting side transmits the first package, carrying out data integration by combining with information per se by the receiving side and returning a second package after integration to the transmitting side after the receiving side receives the first package, and then receiving the second package by the transmitting side; repeating the transmitting and receiving motion continuously until a transmission stop message is received.

Description

【Technical field】 [0001] The invention relates to a data transmission method of dual controllers, in particular to a data transmission method of dual controllers which can avoid reading and writing failures. 【Background technique】 [0002] In storage device products (such as: Just Bunch of Disks, JBOD), if there is a redundant design, there will be a requirement for the data and status of the two controllers to be exchanged with each other, and the most commonly used method is It is to exchange data between two controllers through a set of docking IIC interfaces, such as the controller's system environment information, voltage value, hard disk remaining space, and hard disk configuration information. Generally speaking, multiple IIC devices can be connected to one IIC bus. Some of these IIC devices are IIC masters, and the rest are IIC slaves. The mode of operation is that the IIC master reads and writes to the IIC slave. However, on an IIC bus, if multiple IIC masters si...

AI Technical Summary

Problems solved by technology

However, on one IIC bus, if multiple IIC masters simultaneously read and write to the same IIC slave, it may cause read and write failures.

Although the IIC protocol itself has a mechanism designed to avoid this situation, the implementation of various chip vendors may not 100% meet the requirements of the IIC protocol, and it may not be possible to make corresponding adjustments

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