Hard disk power down protection method, device and hard disk, and hard disk power down protection system

Abstract

The invention discloses a hard disk power-off protection method and a hard disk power-off protection device. The method comprises that when the power-off of the hard disk is detected, the battery power supply input wire which is pre-arranged on the hard disk is switched to receive the power supply of the battery; furthermore, the power supply of the battery is used for carrying out local power supply for the hard disk cache and carrying out the data protection in the hard disc cache. The invention also discloses a hard disk and a hard disk power-off protection system. In the embodiment of the invention, the battery power supply input wire is one of hard disk interface lines and used for connecting with the battery power supply; furthermore, the voltage of the battery power supply does not exceed the set protocol standard voltage of the hard disk interface line. The invention can guarantee the security of the data in the hard disk cache with low cost and high reliability and can realize the compatibility with existing system by further hard disk interface settings.

Description

technical field [0001] The invention relates to a hard disk power failure protection method and a hard disk power failure protection device, and also relates to a hard disk and a hard disk power failure protection system. Background technique [0002] Power-down protection is a technology widely used in high-reliability and high-availability systems. When the system loses power due to an abnormal power supply system, it maintains power supply for a period of time to avoid data loss caused by power failure. [0003] For example, a system with high reliability requirements for data uses UPS (Uninterruptible Power Supply, uninterruptible power supply): after the main power supply fails, the UPS continues to supply power to the system; [0004] For another example, Chinese patent application CN101183801A discloses such a technical solution: after the system is powered off, the backup power supply equipment, such as BBU (Backup Battery Unit, battery backup unit) supplies power fo...

AI Technical Summary

Problems solved by technology

[0007] 1. UPS is expensive, which leads to higher system cost; especially for some systems that use a large number of hard disks, it is necessary to use multiple sets or high-power UPS, which costs more;

[0008] 2. The UPS is bulky, which requires the system to provide sufficient installation space, which increases the difficulty of design and implementation

[0009] Obviously, the prior art does not provide a practical and effective power-down protection scheme for the hard disk

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