A method and device for obtaining bad block information of a hard disk

Abstract

The invention discloses a method and device for obtaining bad block information of a hard disk, which relate to the computer technical field. The invention discloses the method for obtaining the bad block information of the hard disk, comprising running an independent target buffer page in user space of an operating system; if the contents to be read in the hard disk are read to the target cache page in the operating system buffer, establishing a communication channel between the user space and the kernel space of the operating system; if the latest indication bit of the target buffer page changes, determining that the reading content of the target buffer page fails, and judging whether the request of the target buffer page is a write request; if yes, using the kernel space to send the badposition of the request of the target buffer page to the target buffer page through the communication channel. The invention makes the result of writing the hard disk operation failure transferred from the kernel of the operating system to the file system, so that the file system can obtain the result of writing the hard disk operation failure, and shortens the processing flow of the hard disk bad block fault.

Description

technical field [0001] The invention relates to the technical field of computers, in particular to a method and device for acquiring bad block information of a hard disk. Background technique [0002] An operating system (English: operating system, abbreviated as OS) is a computer program that manages computer hardware and software resources, and is also the core and cornerstone of a computer system. The operating system needs to handle basic affairs such as managing and configuring memory, determining the priority of system resource supply and demand, controlling input and output devices, operating the network, and managing file systems; the operating system also provides an operation interface for users to interact with the system; application programs Through the general read operating system call provided by the operating system (such as Linux and Windows, etc.), the hard disk data is read. Due to the existence of the operating system cache mechanism, the file system can...

AI Technical Summary

Problems solved by technology

[0003] During the write operation, if an irreparable bad block is encountered (the hard disk bad block that cannot be repaired by the write operation is called an irreparable bad block), the ATA (Advanced Technology Attachment) driver will get the result of "write operation failed", but in When the write operation is in progress, the write operation of the file system has already ended, and the result of "write operation successful" has been obtained. In this regard, the operating system cannot feedback the result of writing to the hard disk to the file system, and the file system cannot know the irreparable damage of the hard disk. Block information, hard disk bad blocks will cause the drive to fail to read the hard disk, and when storing data, the stored data may not be stored in the hard disk, resulting in data loss

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