Anti-power-down linux system startup method

Abstract

The invention discloses a power-down prevention Linux system startup method. The method is a union file system method and comprises an initialization step and a folder recovery step. In the initialization step, four key folders such as / etc, / root, / var and / tmp of a root file system are remounted into four empty read-write folders of a memory file system in a way of remounting of a file system; in the folder recovery step, the first three empty read-write folders of a memory file system is combined with corresponding read-only system folders on a disk by calling related commands of union folders, so that the first three empty read-write folders comprise the contents of the corresponding read-only system folders on the disk. By the method, in the process of system startup and operation, system folders are written in the memory instead of the disk, so the file system is protected and a perfect power-down prevention scheme is realized.

Description

technical field [0001] The invention relates to a starting method of a Linux system, in particular to a starting method against power failure. Background technique [0002] In information publishing systems and set-top box systems and other similar Linux customized systems, there will be such a requirement in practical applications, that is, after the user directly cuts off the power, the operating system in the box can still start normally, and it is not allowed to occur due to sudden power failure. As a result, the file system is damaged and the operating system cannot be started normally. [0003] For this type of situation, the common practice is to use a log-type file system, that is, to check and repair the disk based on the log, and greatly reduce the file system used to restore the consistency of the file system when it encounters unpredictable events such as power failures. It can be said that this method can basically solve the problem of file system damage caused...

AI Technical Summary

Problems solved by technology

[0004] As far as the file systems commonly used under Linux are concerned, whether it is EXT2, EXT3, XFS, or REISERFS, regardless of whether they support the log writing function to the disk, they cannot avoid writing to the disk.

And as long as there is physical writing to the disk, there is the possibility of file damage, and the operating system also has the hidden danger of instability or even complete inoperability due to file loss or damage.

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