Method and device for hot plug of card

Abstract

The invention discloses a device for the hot plug of a card, which comprises a front jointed sub card and a rear jointed plate, wherein the front jointed sub card is plugged in the rear jointed plate to perform power on reset, perform hot plug communication handshake with the rear jointed plate, and perform initialization operation; and the rear jointed plate is to be plugged in by the front jointed sub card, performs hot plug communication handshake with the front jointed sub card, resets the front jointed sub card, loads a driving program on the front jointed sub card and initializes the front jointed sub card. Correspondingly, the invention provides a method for the hot plug of the card, which comprises: plugging the front jointed sub card in the rear jointed plate to allow the front jointed sub card to perform power on reset and perform hot plug communication handshake with the rear jointed plate; and after the hot plug communication handshake succeeds, allowing the rear jointed plate to load a driving program on the front jointed sub card and initialize the front jointed sub card. Therefore, the method and the device make the hog plug of the card simple, convenient and flexible and reduce the influences of the hot plug on the system.

Description

technical field [0001] The invention relates to a single board hot plug technology in a hardware system, in particular to a board hot plug method and device. Background technique [0002] Hot plugging (hot-plugging or hot swap) is live plugging, sometimes also called hot replacement (hot replacement), hot addition (hot expansion) and hot upgrade (hot upgrade). The hot-swap function allows users to take out and replace damaged hard disks, power supplies or boards without shutting down the system or cutting off the power supply, thereby improving the system's ability to recover from disasters in a timely manner, scalability and flexibility. Usually, hot plugging uses isolation and buffering processing on signals to protect components and chips of hot plugged devices. For example: Some disk mirroring systems for high-end applications can provide the hot-swappable function of disks. Hot plugging first appeared in the server field, and it was proposed in order to improve the pr...

AI Technical Summary

Problems solved by technology

[0004]1) The technical solution proposed in this patent application document adopts the I2C two-wire serial bus, and the I2C bus interface controls the hot-swappable state of the board, so that the board must be added The I2C interface processing device increases system overhead and usage limitations; in addition, the hot-swap isolation processing system must be electrically connected to each hot-swap board through the I2C bus, which also limits the composition of the system

[0005]2) In the technical solution proposed in the patent application document, the number of I2C bus external boards is limited, and the I2C bus communication increases the burden on the main processor , which increases the complexity of the system, increases the difficulty of system development and reduces the reliability of the system

[0006] Another example: in the document of U.S. Patent Publication No. US6026458 "system with pluggable adapter card and hot-swap interface controller" (pluggable adapter card and hot-swap interface controller system), it is proposed that P-channel MOS transistors be used to power on the hardware Slow start to judge and realize the hot plug of the board, that is, to protect the slow start of the power supply, but there is no direct protection for the hot plug of the single board bus and other communication interfaces, and the biggest shortcoming is the use of one-way The protection of the other party's hot-swapping impact is not enough, which increases the burden on the device and reduces the reliability of the system.

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