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Protection method for caching data of memory system

A high-speed cache and storage system technology, which is applied in memory systems, redundancy in computing, data error detection, electrical digital data processing, etc., can solve problems such as inability to protect high-speed cache storage data

Inactive Publication Date: 2009-01-28
XUZHOU LIFANG MECHANICAL & ELECTRICAL EQUIP MFG CO LTD
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  • Summary
  • Abstract
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  • Claims
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Problems solved by technology

[0006] However, this method of the known technology can only protect the data transferred from the random access memory of the storage system to its internal buffer when the system is powered off, and cannot protect the data stored in the disk cache in the random access memory of the computer system.

Method used

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  • Protection method for caching data of memory system

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Embodiment Construction

[0025] Hereinafter, preferred embodiments of the present invention will be described in detail in conjunction with the accompanying drawings.

[0026] Please refer to figure 1, this figure is a method flowchart of a method for protecting cached data of a storage system according to the present invention. As shown in the figure, the method includes the following steps:

[0027] When the storage system is started, a reserved area of ​​appropriate length is reserved at an appropriate start position of the random access memory of the storage system (S100), wherein the appropriate start position of the reserved area is the random access required for the initialization of the operating system of the storage system The memory location and the location of the hardware outside the random access memory map, and the appropriate length is calculated by the following formula: ((random access memory size) / (cache description item size)+1)*(reserved area entry size)+(UUID size), UUID is a un...

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Abstract

A data protecting method of high-speed memory of storing system is used to protect data of high-speed memory which possess function of supplying power. The invention reserves an area in system random access memory to record information of describing item of disk high-speed memory. When the storing system is power off, the data in system random access memory is protect by function of supplying power by battery. When the storing system is restarted, the data in system random access memory is protected by reserving area. And when the storing system is restarted, the data in system random access memory is written into corresponding block equipment, and realize the power off protect function for data in system random access memory.

Description

technical field [0001] The invention relates to a data protection method, in particular to a data protection method of a cache of a storage system. Background technique [0002] In a computer system, the calculation speed of a central processing unit (CPU) is extremely fast, but it takes a long time to directly read and write block devices (such as hard disks, SCSI hard disks, disk arrays, etc.), especially for block devices. At first, the CPU uses the PIO (Programmed I / O) method to read and write block devices, that is, the CPU must wait for the completion of the block device read and write operations before continuing to perform subsequent tasks, which greatly wastes CPU time and reduces CPU resources. In order to solve this problem, an interrupt method is adopted, that is, when the CPU reads and writes the block device, it can perform other tasks. task, which improves the efficiency of CPU usage. However, this method does not make full use of the characteristics of ran...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F11/14G06F12/08G06F12/0873
Inventor 王兴家郭建锋曹苍眸陈怡陈玄同刘文涵
Owner XUZHOU LIFANG MECHANICAL & ELECTRICAL EQUIP MFG CO LTD
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