Circuit and method of DEBUG card used for simulating server input voltage abnormality

Abstract

The invention provides a circuit and a method of a DEBUG card used for simulating server input voltage abnormality. Firstly, a PSU power supply is used to supply power to a server motherboard throughthe DEBUG card, and the motherboard works normally; then an output voltage value and duration of a DC SOURCE are adjusted, power supply mode switching is carried out on the two power supplies of the PSU and the DC SOURCE through a switch, and then input voltage of the motherboard is instantaneously changed; and a different shown phenomenon and BMC log of the motherboard for a different voltage value and different duration are compared with an original fault phenomenon and BMC log, and a fundamental cause of the motherboard work abnormality is positioned. According to the technical scheme of the invention, operations are simple, for different abnormality phenomena, the output voltage value is adjusted through the DEBUG card to reproduce the abnormality phenomena, fault positioning can be rapidly carried out, and problem analysis efficiency is greatly improved. The circuit and the method are suitable for use in input voltage abnormality investigation of all server motherboards on markets, realize accurate positioning for faults, and are high in generality.

Description

technical field [0001] The invention relates to the technical field of servers, in particular to a DEBUG card circuit and method for simulating abnormal server input voltage. Background technique [0002] With the development of network applications, informatization has gradually covered all areas of society. People's daily work and life are more and more communicated through the network, and the requirements for stable server work are also increasing. When the server works abnormally, it is the most important maintenance link for customers to find out the fault as soon as possible, complete the quick repair, and make it return to normal work. In this demand environment, the DEBUG card (voltage abnormality debugging card) that can help locate the problem point as soon as possible came into being. [0003] For the problem of abnormal input voltage, two methods of power failure or DC SOURCE voltage change are usually used to simulate power failure, and then read the BMC log ...

AI Technical Summary

Problems solved by technology

Using the power-off method, there are only two states of 0V and 12V, and it is impossible to simulate the fluctuation of the input voltage; using DC SOURCE to change the voltage, the maximum rate of voltage switching is 1V / ms, which is a ramp-type voltage change, which cannot be simulated. Instantaneous cliff-like voltage changes, so in many cases the power input problem cannot be reproduced, and the troubleshooting efficiency is low

[0004] It can be seen from this that in the prior art, the troubleshooting method of the power supply is simple, and it is impossible to simulate the instantaneous abnormality of the output voltage of the power supply during the normal operation of the machine, so the failure of the sudden low output voltage of the power supply cannot be reproduced and solved. low efficiency

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