Disk bad block processing method based on soft RAID (redundant array of independent disks)
A processing method and bad block technology, applied in the fields of electrical digital data processing, instruments, and computing, can solve the problems of reducing the reliability of data storage, unable to reconstruct bad block data, unable to deal with bad blocks, etc., so as to facilitate flexible processing, improve The effect of data reliability and efficient use of storage space
Active Publication Date: 2012-06-20
TOYOU FEIJI ELECTRONICS
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Problems solved by technology
At present, most disk array products using soft RAID integrate the RAID management function in the corresponding storage operating system, and use these functional software to build a common level of RAID. However, these array products using soft RAID have a common problem in data reliability. The problem is that they cannot deal with the bad blocks generated during the use of the disk, and cannot use the characteristics of RAID to reconstruct the original content of the bad block. As a result, when a bad block is generated on the disk, the disk needs to be replaced. RAID rebuilding wastes storage resources and reduces the reliability of data storage
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[0036] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0037] The functional software involved in this method is integrated in the storage operating system corresponding to a certain disk array, and the architecture of the whole system is shown in the attached figure 1 shown. The storage operating system is independently developed and is a Linux operating system with a kernel version of 2.6, which realizes the functions of creating, maintaining and deleting soft RAID; the system uses a self-designed U disk as the storage medium and is made into a USB boot disk format ; The prepared U disk is installed on the motherboard or controller of the disk array in the form of accessories, which is convenient for plug-in and replacement. The storage operating system is a hierarchical structure. The kernel mode program and the user mode program are sequentially constructed on the physical hardware, and the logical vol...
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The invention relates to a disk bad block processing method based on soft RAID (redundant array of independent disks). The method is integrated in a memory operating system corresponding to a disk array, a plurality of spare sectors are reserved in each disk of the disk array and used for re-mapping the use of the bad blocks of the disk, a bad block re-mapping table is customized and used for storing the bad block re-mapping relations on the disk, then the inner core drive of the memory operating system is mainly modified, and the bad blocks of the disk are processed on the basis of the situations according to the specific characteristics of whether the used disk is in a redundant state, whether the disk supports the bad block re-mapping operation, and the like. The method provided by the invention can be used for improving the data reliability in a soft RAID environment with more flexible processing mode and higher processing efficiency.
Description
technical field [0001] The invention relates to a method for processing bad blocks of a disk, in particular to a method for processing bad blocks of a disk in a soft RAID environment, and belongs to the technical field of computer data storage. Background technique [0002] In large-capacity data storage, magnetic disk is a widely used storage medium. Physically speaking, each hard disk has its own "CHS" parameters, namely the number of heads (Heads), the number of cylinders (Cylinders) and the number of sectors (Sectors), and each sector is generally 512 bytes. The number of sectors in each track of the old-fashioned disk is equal, and random access to any sector can be realized by using these three parameters. However, the recording density of the outer cylinder in this way is much lower than that of the inner cylinder, which will cause disk space loss. Waste, has been abandoned by most disk manufacturers, and instead adopts an equal-density structure to produce hard disk...
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IPC IPC(8): G06F11/00
Inventor 王道邦周泽湘张伟涛李艳国武志民章珉潘兴旺张恒
Owner TOYOU FEIJI ELECTRONICS