SFF-8485 agreement fault-tolerant analyzing method based on sequence flow detecting

Abstract

The invention provides an SFF-8485 agreement fault-tolerant analyzing method based on sequence flow detecting. The method comprises the following steps of: 1) redefining the starting sign of agreement analysis, namely continuously generating the low level of four clock periods on an SLOAD signal line, in the next adjacent clock period, and the level of the SLOAD signal line being changed to high level, and namely the SLOAD having rising edge step change; on the SLOAD signal line, under the match of a clock signal, detecting the set sequence flow '00001' of the starting sign of agreement analysis, namely continuous four low levels and one high level; 2) when no sequence flow of the starting sign of agreement analysis is detected, not responding to any change of an SDATA signal line; and when the set sequence flow '00001' of the starting sign of agreement analysis is detected, starting the analysis for the state data of a hard disk, temporarily storing the analyzed state data of the hard disk, and meanwhile continuously detecting the sequence flow '00001' of the starting sign of agreement analysis.

Description

technical field [0001] The present invention relates to the field of computer communication, and specifically uses a SFF-8485 protocol fault-tolerant analysis method based on sequence flow detection to solve the lack of fault-tolerant analysis and identification of the SFF-8485 protocol in the passive identification method of the current actual product SFF-8485 protocol problem, greatly improving the real-time analysis capability of the SFF-8485 protocol, and improving the fault tolerance for protocol identification. Background technique [0002] With the increasing integration of servers, the simplification of signal connection paths between servers and peripheral components has been highly valued by manufacturers and users, and various serial protocols that save signal channels have emerged, among which the SFF-8485 protocol is one of them. It is widely used in the status monitoring of disk arrays; since most applications have a collection of multiple hard disks, that is, ...

AI Technical Summary

Problems solved by technology

[0003] In the real-time analysis of the SFF-8485 protocol, the passive acceptance method is mainly used at present, that is, as long as there is data transmission on the SFF-8485 protocol bus, and there is a rising edge transition on the SLOAD signal, the data on SDATA is sequentially read, and Forcibly assigning data to the hard disk status indicator, this passive protocol identification method, in many cases, for example, the signal based on the SFF-8485 protocol sent by the main controller is incomplete or there is interference on the transmission line, which will lead to errors in the hard disk status instructions, it is easy to mislead the user, such as when the hard disk is positioned incorrectly, the user replaces the wrong hard disk, which will result in the loss of RAID data and the inability to complete data reconstruction, etc.; therefore, this passive SFF-8485 protocol identification method, cannot fully guarantee the reliability of the system work; for the lack of fault-tolerant analysis and identification of the SFF-8485 protocol in the current practice, according to the characteristics of the SFF-8485 protocol itself, through in-depth analysis, we have summarized a sequence-based SFF-8485 protocol fault-tolerant analysis method for flow detection

Images